NUDIBRANCIIIATE GASTEROPODA. 



33 



Cor. salmonacea (Couth.). 



CoryphcUa salmonacea (Couth.). R. Bergh, anatom. Bidr. til Kundsk. 0111 Aeolidierne. Kgl. D. Vidensk. 



Selsk. Skr. 5. R., naturv. og mathem. Afdel. VII. 1864. p. 227 — 237. Tab. IV. 



PI. IV, figs. 18— 19; PI. V, figs. 2— 8. 



To this species may with rather great certainty be referred 3 specimens, taken on 65°34' L,at. N., 

 54° 31' Long.W. (station 29) at a depth of 68 faths (temp. o°2). — One large individual was quite eviscer- 

 ated, of the other the bulbus pharyngeus was taken. 



According to an accompanying note the living animals were white with brown dorsal 

 papillae 1 ). The specimens that had been preserved in alcohol, were as a rule of a yellowish white 

 colour. 



The length of the two large individuals was now 2 - 5 cm , while the little one only measured 

 i"5 cra ; the breadth of the body was in the two former 8 mm , in the latter 3"5 mra , the height of the body 

 respective!}' j mm and 3""". In the large specimens the tentacles had a length of 5 mm , the rhinophores of 

 6 mm , and the dorsal papillae of up to 3'5 mm ; the foot rose to a length of 6-5 ram and a breadth of 5 - 5 mm , 

 the corners of the fore edge were only little produced, the foot-brim was narrow, the tail short. 



The form was as usual. The head was as before (1. c. pi. IV, figs. 34, 40) described. The not 

 broad, papillose lateral parts of the back showed close-set, indistinctly separated, and often displaced 

 transverse and oblique series of papillae, the series mostly containing 4 — 6 papillae. The papillae were 

 lengthened-conieal , and did not easily fall off. From the region of the strong genital papilla the 



intestine was seen very distinctly shining through in its direct course to the anal papillae, projecting 

 at the dorsal edge a little behind the middle of the length of the body; the fine renal pore was seen 

 (above the intestine) midway between the genital and the anal papilla. The foot was powerful, 



rather broad. 



The white central nervous system was as before (I.e. fig.41) described by me; the right 

 pleural ganglion sent forth a rather long N. genitalis forming a rather large ganglion (of a diameter 

 of o-24 mm ) with one large cell (diam. o - i6 mm ) and several smaller cells. 



The almost sessile eye situated in front of the cerebro-pedal connective, is globular, of a dia- 

 meter of o-i2 mm . Close behind the eye the otocyst is seen of a diameter of o-i4 TT " n with a not great 

 number of clear otoconia. 



The bulbus pharyngeus is large and powerful, in the two large individuals of a length of 

 5-5 — 6 mm , by a breadth of 4— 4-5""" and a height of 3 - 25 mra . Its form was as has earlier been described 

 (I.e. figs. 1 — 3); the labial disk large, the radula sheath projecting in a knoblike manner; in situ the 

 mandibles were seen of a light grayish brown colour. The}- were of the earlier (I.e. figs. 4 — 6) de- 

 scribed form, greenish yellow with a not strong hinge-part, short and powerful masticatory process; 

 the masticator}- edge rather broad with mostly 8 — 9 series of obtuse or, on the edge itself, pointed 

 denticles (fig. 2). The secondary oral cavities were not small, but their opening narrow (comp. 1. c. 

 figs. 4, 10); their hinder wall is, for the greater part, covered with a strong, yellow cuticle, crossed 



') According to the MSS of the Greenland investigator Moller (comp. I.e. 1864. p. 228) the animals are said to be 

 semitransparent, pink, with gray-brown or red papillse with white point. 



The [ngolf-Expedition. II. 3. 5 



