NUDIBRANCHIATE GASTEROPODA. 



The oral aperture bears a strong, almost ringshaped labial plate, composed of densely set, 

 rather high, a little hooked elements with cleft points. The radula has small median tooth-plates and 

 a row of erect lateral plates with denticulated margins. — Glans penis is provided with rows of small thorns. 



Of the genus only a few species are known, chiefly from the cold seas, and their specificness 

 is not beyond all doubt, possibly these forms belong to one and the same species. 



i. C. repanda (A. et H.). 



M. atlant. or. et occ. 

 C. glabra (Friele et Arm. Hansen). 

 M. atl. or. septentr. 



3. C. Clarae, Jher. 



M. mediterr. 



4. C. pacifica, Bgh. 



M. pacific, septentr. 



Cadlina repanda (Aid. et Hanc). 



R. Bergh, I.e. 1S79. p. 115 (171)— 120 (176). PI. V, fig. 15; PI. VI, fig.2i — 22; PI. VII, fig. 9— 18; 

 PI. VIII, fig. 3-6. 

 1. c. 1894. p. 169 — 171. Taf. VII, fig. 4 — 11. 



PL II, fig. 16—19. 



At station 27 i. e. on 64 54' Lat. N. and 55- 10' Long. W. a single specimen of this species was 

 taken at a depth of 393 faths (temp. -)- 3°8). 



The specimen that had been preserved in alcohol of 70% showed a chiefly whitish colour, and 

 was of a somewhat stiff and frangible consistency. The length was 13™' by a breadth of 7 mm and a 

 height of 5 mm ; the breadth of the foot was 3 mm , the length io mm ; the breadth of the mantle-edge was 

 j. -mm. t ] ie l! el ght of the almost outstretched rinophoria 2 mm , and of the retracted gill likewise 2 mm . 



The outer form was as usual in this species. The club of the rhinophoria strongly perfoliate; 

 there appeared only to be seven gill-leaves; the genital papilla as usual. 



The skin was densely stuffed with very long, slightly yellowish, cylindrical spicules, sometimes 

 slightly and sparsely rugged on the surface, strongly calcified, and measuring 0-025""" m diameter. 



The bulbus pharyngeus was strong, of a length of 275 mm with the radula-sheath 

 strongly conspicuous on the under part of the posterior end; the elements of the broad, yellow, ring- 

 shaped labial plate reached a height of o-075 mm (fig. 16). The tongue was broad and flat; the almost 

 colourless radula contained 36 rows, and further backward appeared still 50 rows, the four hindmost 

 of which were not yet quite consolidated; thus the total number of rows was 86. The number of 

 tooth-plates in each row was in the hindmost part of the tongue 44 q. The tooth-plates were almost 

 quite colourless; the length of the median teeth rose to o-04 mm , and the height of the lateral teeth rose to 



') The number of the series of teeth in the |6) before examined individuals was 51 — 70 and 96; the number of tooth- 

 plates in each row was 22-29 an d 3 1 - I" Cadlina pacifica the number of the series of teeth was 67 — S5, and of the plates in 

 the rows 27— 7,% 



