Full resolution (JPEG) - On this page / på denna sida - Sidor ...
<< prev. page << föreg. sida << >> nästa sida >> next page >>
Below is the raw OCR text
from the above scanned image.
Do you see an error? Proofread the page now!
Här nedan syns maskintolkade texten från faksimilbilden ovan.
Ser du något fel? Korrekturläs sidan nu!
This page has never been proofread. / Denna sida har aldrig korrekturlästs.
is translatée! by ,,tke tootlied edge“. The „proximale und distale Zahnleiste“ = „the proximal
and distal tootk-lists“. The „Zahnplatte“ or „Zahnwulst“ is called in the present work „the
masticatory pad“.
This terminology differs in a number of respects from that used by G. W. Müller.
Thus this investigator calls (1890 a) „the toothed edge“ and the two tooth-lists sometimes the
first, second and tliird, sometimes the tliird, second and first „Zahnleiste“; cf. pl. XXVIII,
figs. 18 and 20. In this investigator’s work of 1894 these parts are similarly called „Zahnleiste“,
but they are not enumerated. In the genus Conchoecia „the masticatory pad“ is divided into
two more or less well difEerentiated parts; the distal one of these is called by G. W. Müller
„Zahn“, the proximal one „Wulst“, both in his work of 1890 a and in his large monograph.
In the present work the term tube-bristle is given to a distally blunt (somewhat
rounded) bristle with — in comparison to the side-walls — an exceedingly thin-walled distal
point; on account of this structural peculiarity bristles of this type have a somewhat tubedike
appearance, whence the naine tube-bristle. The point of a bristle of this sort is, when seen from
the side, almost always furnished with two exceedingly short and fine points. (Only apparently?
Do these two spines correspond to a closed ring? On account of the smallness of these forms
I have not been able to decide this question with certainty. It does not, however, seem
abso-lutely impossible.) No terminus tecnicus has so far been found for this type of bri.stle, as this
peculiarity of structure has not been observed by previous writers.
Upper lip: — The two comb-like parts of the postero-ventral edge of the upper lip,
which are furnished with a row of more or less powerful hairs, are called below simply the combs
of the upper lip.
Which genus of this
sub-fam ily is the most.
primitive?
Transitional forms
between the genera.
Number of joints of
the first antenna in
Conchoecia and
Il alocypris.
Remarks: — Which of the four genera belonging to this sub-family is to be considered
as the most primitive? It must be admitted that this question is exceedingly difficult, not to
say impossible, to answer at present. They are ail variations of the same theme and the variations
are not profound. In this matter I have nothing to add to what has been said by G. W. Müller.
1894, pp. 223 and 224.
No transitional forms between these genera are known. It is true that there are
Statements about such forms, but these are only due to lack of knowledge about the forms in tins
group; as an example I may mention J. Lubbock’s statement (1856, p. 34) that Conchoecia
atlantica (LUßB.) is an intermediate form between the genera Conchoecia and H alocypris.
There has been a certain amount of difference of opinion as to the explanation of the
joints of the first antenna in the genera Conchoecia and Halocypris.
With regard to the first antenna of the males of the genus Conchoecia we find the following
Statements in the literature: G. O. Sars writes 1865, p. 116: „antennae superiores .... in
mare .... distincte 4 articulatae“. In this writer’s work of 1887 it is pointed out (p. 71)
that this antenna is composed of „5 tydeligt begraendsede Led“, i. e. of five distinetly defined
joints. — In C. CLAUS’s work of 1874 b, we find (p. 10): „der Endabschnitt besteht auch nur aus
zwei Gliedern, neben denen freilich der obere ringförmig abgesetzte Theil des zweiten
Schaftgliedes den Eindruck eines dritten Gliedes macht“; thus according to this view* this antenna
<< prev. page << föreg. sida << >> nästa sida >> next page >>
