XmiBRAXCHIATE GASTEROPODA. 



Bathydoris Ingolfiana, Bgh. n. sp. 

 Corpus quasi subgelatinosum, dorsum subpellucidum. Rhinophoria et tentacula bruunea, brau- 

 chia et genitalia externa aurantiaca, podarium e nigro purpureum. 

 Hab. M. atlant. arctic. 



PL I; PI. II, fig. i—2. 



The only specimen of this remarkable form was taken on 59°i2' Lat. X., 51" 08' Long. W. (the 

 broad part of the Davis Strait, about West of Cape Farewell) from a depth of 1S70 fathoms, by a 

 bottom temperature of i - 3° C. According to the kind communication by Prof. Juugersen, the trawl 

 here brought up a whole cart-load of large, firm blocks of clay, the substance of which reminded of 

 potters clay, and seemed to contain no organisms, and also a fluid, yellowish mud, in which were 

 only found some Rhizopoda, small Crustacea (Isopoda, Tanaidae, Amphipoda, Ostracoda), and a few 

 dead shells of Yoldia-like small bivalves, of Dentalia, and of a form of Buccinida. The swabs were 

 empty, and accordingly the bottom must certainly have been poor. Of larger animals the same trawl- 

 ing only brought the common little deep-sea fish Cyclothone microdon, a pair of curious Actinia, and 

 a longstalked, cupshaped silicious sponge, as well as a characteristic red Planaria swimming edgewise, 

 and furthermore a Xemertine. Moreover was found in the meshes of the trawl an immense number 

 of colourless lumps of jelly, warty on the surface, and about the size of a hazel-nut 



The nature of the mentioned lumps of clay caused this animal to come up in a partly some- 

 what rubbed condition. It gave no sign of life at all, and did not contract when touched. It was 

 immediately put into 70% alcohol, and is said to have neither contracted much therein, nor altered 

 its form. 



The animal in its fresh state is stated to have been of an, as it were, somewhat gelatin- 

 ous consistency, and the somewhat scraped dorsal side quite transparent, so that the intestines might 

 be seen through it. With the exception of the almost colourless back the animal was of a dark-brown- 

 violet colour, but much darker on the foot. 



The animal, which is rather well preserved in the alcohol, showed on the back a light green- 

 ish white ground-colour, crossed through by a network with wide meshes of branched and anastomotic 

 blackbrown stripes, in the crossings of which were often seen small black rings with whitish centra 

 (partly from broken-off papillae?), similar very small and small rings were moreover found spread in 

 the meshes. Towards the foot the colour became velvet-black, and of this colour was also the back 

 of the neck and the upper side of the foot. The rhinophoria were yellowish, the fore part of the 

 head black brown, the tentacles brownish yellow; the exterior genitalia were yellowish; the gills were 

 dirty brown, as was also the sole of the foot. The length of the animal was c/3 cm by a height of 

 6-5 cm and a breadth of 6 cm ; the foot was 6 cm long by a largest breadth of s^™" 1 ; the footbrim was 

 13— I 5 mm broad, the tail 6 mm long; the fore end of the head was about 2-6™ broad, each tentacle be- 

 sides projecting r^ m , the club of the rhinophore 1™ high; the diameter of the flat gills was 1— r5 cm 

 the height of the anal papilla ; mm ; the prseputinm projected 6 ,nm . The colossal folds of the vulva 

 were vy™ high, and when spread from each other they had a breadth of 3™ by a length from above 

 downwards of 2'5 cm . 



