00 



1 879- Triptera coliimnella, cancellata Pfefter, Uebersicht der auf S. M. Schift" "Gazelle" und 

 von Dr. Jagor gesammelten Pteropoden, Moiiatsber. d. k. preuss. Akad. d. Wis- 

 sensch. Berlin, 1879, p. 243, figs. 18 — 19. 



1886. Cuvierina cclitiiinclla Boas, Spolia atlantica, Bidrag til Pteropodernes Morfologie, etc., 

 p. 132, pi. 3, fig. 39; pi. 6, fig. 95; pi. 4, fig. 56. 



Empty shells: 



Stat. 59. 10° 22'. 7 S., 



Stat. 157. o°32'.9 S., 



Stat. 178. 2° 40' S., 



Stat. 208. 5° 39' S., 



Stat. 211. 5°4o'.7 S., 



Stat. 241. 4° 24'. 3 S., 



Stat. 300. io°48'.6 S., 



123° 16'. 5 E. I spec. 



1 19° 8'.5 E. I spec. 



1 1 9° 40' E. I spec. 



120° 37'. 5 E. I spec. 



1 20° 44' E. 5 spec. 



130° 1 4'. 6 E. I spec. 



I28°37'.s E. 3 spec. 



122° 12' E. 2 spec. 



1 20° 45' E. 2 spec. 



1 29° 49'. 3 E. 1 1 spec. 



123° 23'.! E. I spec. 



The only known species of this genus has been recorded from three stations. Only 

 empty shells have been found. 



Boas (see the Hst of synonyms), who changed the generic name Cuvieria Rang, into 

 Cuvierina^ as the title Cuvieria was already given to other animals before 1827, distinguished 

 two varieties. 



One of them, the var. typica, already known to the discoverer of the species, is elongated, 

 and the constriction behind the aperture is more marked than in the second form. This is var. 

 ni'ccolaris, which was regarded by M0RCH (see above) as a distinct species, as Pfeffer has 

 done too [Triptera cancellata, see above). This variety is shorter and more bulgino-. These 

 two forms, however, are linked by gradual transitions. According to Boas, typica occurs in the 

 Atlantic, in the Indian Ocean, and East-Pacific, while urceolaris is found in the China Sea and 

 the West-Pacific. It was to be expected, that the two varieties should occur together in the 

 Indian Archipelago. The Siboga-specimens must be referred to urceolaris, but other specimens 

 (with the animals in the shells) from Sunda Strait (Utrecht Zoological Museum) belong partly to 

 tirceolaris, partly to typica. . 



Remarks upon Anatomy. 



I could only study a few specimens from the Utrecht Zoological Museum, two of which 

 I have sacrificed for anatomical purposes. The same authors who studied the anatomy of Clio, 

 have also occupied themselves with the investigation of Cuvierina. 



I could state that Ctivieritta shows great resemblance with the subgenera Stvliola and 

 Clio (s. sir.). The left tentacle, however, though situated on the same transverse line with the 

 right, is much less developed, and very small. The fins agree with those of Clio (s. str.J, but 

 the posterior lobe of the foot is notched in the middle of its free margin ; this was already stated 

 by SoULEYET ') and b)- Pelseneer "), but the figure of this last author does not show it sufficiently 



1) Voyage de la Bonite, Zoologie, vol. II, p. 199, pi. XII, figs, i — 3. 



2) Chall. Rep. L.KVI, p. i6, pi. II, fig. 6. 



SIBOGA-EXPEDITIE LII. 



