39 



divergence of the latcral niargins, and the direction of the t(>rminal point, which does not exhibit 

 the strong- curvature of Cavolinia nnciiiata at all, but is almost straight (PI. II, figs. 32 — 33). 

 The variety affinis in its most extreme forms, had been recorded already from the East- 

 Pacific Ocean (Boas, Spolia atlantica, p. 116). 



The variety h'uncata of this author (South-Atlantic and western part of Indian Oceanj 

 was not found among the Siboga-specimens. 



4. Cavolinia itncinafa (Rang). 



1836. Hyalaea iincinata Rang, in: d'Orbignv, Voyage dans rAmérique meridionale, vol. V, 



p. 93, pi. V, figs. II — 15. 

 1S50. CavoUna uncinata Gray, Catalogue of the Alollusca in the Collection of the British 



Museum, pit. II, Pteropoda, p. 7. 

 1880. Hyalaea iincinatifonnis Pfeffer, Die Pteropoden des Hamburger Museums, Abh. aus d. 



Geb. d. Naturw. herausg. vom Naturw. Ver. Hamburg, Bd. VII, p. 83. 

 1888. Cavolinia uncinata Pelseneer, Chall. Rep. LXV, p. 84. 



Living animals: 



Stat. Wj^. i°i5' N., 123° 37' E. 3 spec. 

 Stat. 303. Haingsisi, Samau Island. i spec. 



Empty shells : 



Stat. 



Stat. 



Stat. 



Stat. 



Stat. 



Stat. 



Stat. 



Stat. 102 



Stat. 105 



Stat. 117". i°i5 



Stat. 136. Ternate. 



Stat. 137. o°23'.8 N., 



45- 



52. 



59- 



65». 



88. 



90. 



95- 



/ 



9° 3 

 10° 22 



7° o 

 o°34 

 i°i7 



5°43 

 6° 4 

 6° 8 



24' S., 



■•4 S., 



7 S., 



S., 



.6N., 



'.5 N., 



5N., 



iN., 



N., 



N., 



Ii8°i5'.2 E, 

 ii9°S6'.7E 

 I23°i6'.5 E 

 120° 34'. 5 E 

 119° S'.sE 



ii8°53' E 

 1 1 9° 40' 

 1 20° 44' 

 121° 19' 



12; 



E. 

 E. 

 E. 

 E. 



Stat. 139. 



Stat. 151. 



Stat. 159. 



Stat. 178. 



Stat. 208. 



Stat. 212. 



Stat. 221. 



Stat. 267. 



0° 1 1' S., 



0°I2'.6 S., 



o°59'.i S., 



2° 40' S., 



5° 39' S., 



5° 54.5 s., 



6° 24' S., 



5° 54' S., 



Stat. 300. 10° 48'. 6 S., 

 Stat. 312. 8° 19' S., 



127° 29' E. 

 i27°25' E. 

 129° 48' E. 

 i29°48'.8E. 

 i28°37'.5E. 

 122° 12' E. 

 120° 19'. 2 E. 

 124° 39' E. 

 [32°56'.7E. 

 123° 23'.! E. 

 117=41' E. 



1 spec. 

 10 spec. 



2 spec. 

 2 spec. 



31 spec. 

 I spec. 



15 spec. 

 14 spec. 



I spec. 



I spec. 



1 spec. 



7 spec. 



2 spec. 

 4 spec. 



17 spec. 



32 spec. 

 9 spec. 



8 spec. 

 2 spec. 



1 spec. 



2 spec. 

 I spec. 



Cavolinia uncinata^ chiefly represented by empty shells, is a very common form. 



Some specimens are remarkably hyaline, but in the sculpture of the shell, the curvature 

 of the posterior point, as well as in the direction and size of the lateral spines, all the 

 specimens are very much alike. 



