704 TAGE SKOGSBERG 



only applies to the first of the two finds included in this work of Brady's. The specimens from 

 the Pacific have not been investigated by me. 



The form C. spinirostris described l)y C'li. Ji hay, 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: o = 1,0 — 1,1 mm., $ = 1,1 — 1,4 mm. The e-bristle on 

 the male first antenna: ,,the distal eleven or twelve pairs of hooks large, strong and closely set, 

 followed proximally by ten or twelve much smaller ones which are farther apart." The b-bristle 

 on the endopodite of the male second antenna is fm-nished wnth 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 characters: Length of shell: (J= 0,9 to 

 1,0 mm.; ? — 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. ^A^ith 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 characters 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. spiniroslris C. Claus is also included in G. W. Muller's large work of 1906 a. In 

 this work we find the following information about the three characters just mentioned: Length 

 of shell: o = 0,9.5 — 1,4 mm.; $ = 1,1 — 1,6 mm. E-bristle on the male first antenna: ,,die 

 Zahnchenreihe der Hauptborste beginnt distal mit einer Doppelreihe sehr dicht stehender breiter 

 Zahne, welche nur wenig Raum zwischen sich lassen. Etwa beim 14. Zalm nahern sich beide 

 Reihen und schieben sich zwischeneinander, so daB sie eine einzige, wenn audi nicht ganz gerade 

 Reihe bilden. Von derselben Stelle an rlicken die Zahne weiter auseinander, werden borsten- 

 formig. Man sieht im Profil 30 — 40 Zahne resp. Borsten (wobei die Doppelreihe einfach gezahlt 

 ist)". The b-bristle on the endopodite of the male second antenna is furnished with ,,eine kleine 

 Gruppe von langen Haaren (fehlen ofters, abgebrochen)"; in pi. 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. XL 1901; temperature, 

 22, 50'' v.), to which no attention is paid in the description given above. These individuals 

 differed in the following 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. MCller, 1906 a. 



First antenna: — The armature of the e-bristle agreed with that given by 

 G. W. MOller, 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. 



