^ 2 NUDIBRANCHIATE GASTEROPODA. 



The bulb its pharyngeus was of an oval form, o-8 mm long. The hinge-part of the man- 

 dibles (fig. 24a) was strongly yellowish, otherwise they were almost colourless; the not short masti- 

 catory edge had a single series of pointed denticles of a height of o , oo45 mn ' (fig. 24 b). The lengthened, 

 narrow tongue showed a very slightly yellowish radula containing 46 tooth-plates (34 on the lower 

 side, 12 on the upper one), and two were further found lying loose posteriorly at the base of the 

 tongue; in the radula-sheath 20 tooth-plates were seen, of which the three hindmost ones were not 

 yet fully developed; thus the total number of tooth-plates was 66 1 ). The tooth-plates were yellowish; 

 thev had a breadth of o-o6 mm by a height of ot)4 mm , and were of the earlier described form with 6 

 pointed denticles on each side of the but little strong hook (figs. 25 — 27). 



The liver-lobes were as before mentioned. The pyriform cnidocyst was in the largest pa- 

 pillae o-30 mm long; the cnidse were roundish, their largest diameter 0-007 — croi3 mm . 



The penis was as described before; the colourless hook that was slightly curved, and at the 

 end, as it were, obliquely cut off, (fig. 28 a) was about cro7 mm long. 



Galvina, Aid. et Hanc. 



R. Bergh, System der nudibranchiaten Gasteropoden. 1892. p. 1026 — 1027. 



The Galvinae form a rather well marked g oup. Even their exterior is remarkable by the 

 dorsal papillae being, as it were, somewhat inflated; they show, however, especially a quite 

 peculiar structure of the radula, which has strong median teeth, the hooks of which are, as it 

 were, bent down and situated below the level of these teeth; the lateral teeth are very broad, 

 and their inner part projects backwards in a lanceolate hook. 



The Galvinae seem chiefly to belong to the less warm tracts of the sea. 



Galvina sp. (anonyma). 

 PI. IV, figs. 21—25. 



Together with some specimens of Coryplulla salmonacea (mentioned above) another little Aeo- 

 lidia was taken, which, in a short notice, is said to have been whitish with red dorsal papillae. 



The individual, which was only middlingly preserved in alcohol, was of a yellowish white 

 colour. Its length was io mra , by a breadth of the body of up to 3 mm , and a height of up to 2'5 mm . 

 The rhinophores were 2 mm long, the tentacles i mm , and the (remaining) dorsal papillae likewise only 

 i mm long. 



The form was the common one. The lateral parts of the back that were covered with pa- 

 pillae, were more narrow than the naked middle part; the number of series of papillae was not large, 

 and the number of papillae in a series exceeded scarcely 6. The papillae were conical , partly some- 

 what inflated, a great deal had fallen off. The foot was anteriorly rather broad, almost without 

 projecting corners. 



To spare the only known individual, only the bulbus pharyngeus was examined. It showed 

 the usual form, the radula formed a cone on the hinder end; the length was 2'3 ra "', by a breadth 



J ) The number of tooth-plates in the (3) earlier examined specimens was 67, 61, 64; in A. cocrulea it was 60, 57, 60. 



