:MO "TERRA NOVA" EXPEDITION. 



l)ixtrilttioii. Atlantic from 41 N., to 43' S. Indian Ocean from Bay of Bengal 

 in lo S. Red Sea, south-east Arabia to near Australia, 111 40' E. Pacific Oceau ; 

 Yellow Sea, China Sea, ami from 20'N. to 8 8' S. (Pelseneer, 1887, ami Meisenheimer, 

 1905). 1 15' N. 123 C 37' E., and near Samau Island (Tescli, 1904). 



4. Cavolinia inflexa (Lesueur). 



Hyalaea inflc'.'a, Lesueur, 1812-1813. 



dc^ressa, d'Orb., 1836. 



., inflexa and lablata, Souleyet, 1852. 



vaginellina, Cantraine, 1840; Gegenbaur, 1855. 



inflexa, Boas, 1886. 



(s.g. Diacria) laliiata and inflexa, Sowerby (in Reeve, Conchol. Iconica), 1877. 

 Cavolinia inflexa, Tiberi, 1879 ; Locard, 1886 ; Pelseneer, 1889 ; Tesch, 1904 ; J. Meisenheitner, 

 1906; A. Vayssiere, 1913. 



-"N.E. of Rio de Janeiro. New Zealaud(off N. end of). New Zealand (off N. end of). 



Station 47, three. Station 80, one. Station 109, six. 



,, 49, three. ,, 89, one. ,, 1 10, fourteen. 



North Atlantic. ,, 92, seven. 111, one. 



Station 61. two. ,, 93, fifty-seven. ,, 118, two. 



G2, three. 106, one. 130, two. 



107, thirteen. ,, 143, one. 



The specimens taken at Station 93 were chiefly young. 



Distribution. A widely distributed species in all seas between about 40 N, ami 

 about 40 S. Not observed in lare swarms further than 30 N. 





5. Cavolinia, sp. 



Station 61, N. Atlantic, one. 



Station 93, off N. end of New Zealand, one. 



These are young specimens, minus shells, and an attempt to isolate the radula, in 

 the specimen from Station 61, failed. Both have the blunt end to the body 

 characteristic of C. longirostris, Les., and ('. quadridentata, Les. The specimen from 

 the north of New Zealand measures 3 mm. in total length and the median tooth of the 

 radula agrees very well with that of Vayssiere's illustration (1915, table II, fig. 5 1m) of 

 the median tooth of ('. longirostris, Les. It has ten denticles at each side. There are 

 twelve rows at least in the radula although the specimen is so young. The radula of 

 C. quadridentata seems to bear a close resemblance to that of C. longirostris and the 

 lateral teeth of the present specimen agree better with the figures of that tooth given 

 by Vayssiere (op. rit. y pi. Ill, fig. 52 1) of C. i/tniitn'<li'ii.ftif<t, Les. As, however, two 

 examples of ( '. longirostris were taken the previous day at a few miles distance, and 

 C. ijiiiidriili'iitntii is not represented in the "Terra Nova" collection, it is more likely 

 that this little specimen belongs to the former species. The lateral appendages are 

 thicker in proportion to their length than in the adult specimens of C. longirostris. 



