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only applies to the first of the two finds included in this work of Brada ’s. The specimens from
the Pacific have not been investigated by me.
The form C. spinirostris described by Ch. JUDAY, 1906 also shows very far-reaching
agreement with the species described by me above. With regard to the above-mentioned
cha-racters this writer states: Length of shell: <$ = 1,0—1,1 mm., Ç = 1,1—1,4 mm. The e-bristle on
the male firet antenna: ,,the distal eleven or twelve pairs of hooks large, strong and closely set,
foliowed proximally by ten or twelve much smaller ones which are farther apart.“ The b-bristle
on the endopodite of the male second antenna is furnished with two long hairs.
Finally the form described by G. H. Fowler, 1909, under the name of C. spinirostris,
,,Stage II (spinirostris stage)“ is certainly identical with the species dealt with here. The
follow-ing information is given about the above-mentioned charactere: Length of shell: <$= 0,9 to
1,0 mm.; Ç = 1,0—1,2 mm. E-bristle on the male first antenna: ,,about 8—11 pairs of
saw-teeth and 8—9 pairs of spine-teeth“. The b-bristle on the endopodite of the male second antenna
has two long hairs. With regard to the armature of the e-bristle this writer must certainly
have made a mistake; the ,,eight or nine pairs of spine-teeth“ mentioned certainly represent
a single row of eight or nine spines.
It will be seen form this that the forms included in the list of synonyms given above show
very little variation with regard to the three charactere in question, the length of the shell, the
armature of the e-bristle on the male first antenna and the b-bristle on the male second antenna.
C. spinirostris C. CLAUS is also included in G. W. MüLLER’s large work of 1906 a. In
this work we find the folio wing information about the three charactere just mentioned: Length
of shell: S — 0,95—1,4 mm.; $ = 1,1—1,6 mm. E-bristle on the male first antenna: ,,die
Zähnchenreihe der Hauptborste beginnt distal mit einer Doppelreihe sehr dicht stehender breiter
Zähne, welche nur wenig Raum zwischen sich lassen. Etwa beim 14. Zahn nähern sich beide
Reihen und schieben sich zwischeneinander, so daß sie eine einzige, wenn auch nicht ganz gerade
Reihe bilden. Von derselben Stelle an rücken die Zähne weiter auseinander, werden
borstenförmig. Man sieht im Profil 30—40 Zähne resp. Borsten (wobei die Doppelreihe einfach gezählt
ist)“. The b-bristle on the endopodite of the male second antenna is furnished with ,,eine kleine
Gruppe von langen Haaren (fehlen öfters, abgebrochen)“; in pl. XXII, fig. 23 there are five
long hairs on this bristle. The difference between these Statements and those given above is
not inconsiderable.
Among the material investigated by me there were also two mature males, caught at
S. A. E., PI. station 4 b (lat. 25° 51’N., long. 21° 29’ W. ; at the surface; 9. XI. 1901; temperature,
22, 50° C.), to which no attention is paid in the description given above. These individuals
différée! in the foliowiug respects from those previously described by me.
Shell: — Length, 1,3—1,4 mm. ;it was thus rather considerably longer than in those
descri-bed by me above, but agreed with that of the longest ones investigated by G. W. MÜLLER, 1906 a.
First antenna: — The armature of the e-bristle agreed with that given by
G. W. MÜLLER, 1906 a, i. e. the distal spines were situated in pairs to about the fourteenth
spine and one saw in profile about forty spines (the distal double row being counting singly).
The distal ones of these spines had more weakly developed distal plates.
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