62 



KR. BONNEVIE. 



[REP. OF THE "MICHAEL SARS" NORTH 



B 



C 



=^7 



Fig. 52. Median and lateral teeth of: A. Fowlerina hjortii, n. sp. B. Notobranchaea tetrabranchiata, n. sp. 



C. Microdonta longicollis, n. sp. 



Notobranchaea Pelseneer. 



Radula: Median tooth of the family type, the den- 

 ticles of the margin forming two lateral arched rows, with 

 a median row of three small denticles between them. 



Lateral teeth hook-shaped, increasing in size towards 

 the middle line of the radula. (Textfig. 52, B) 



Jaw: A series of hollow spines forming a continuous 

 row 1 ) on the ventral wall of the buccal cavity. 



Hook-sacs shallow, with short hooks, dorsally bor- 

 dered by a group of very large clear cells. 



No buccal cones. 



Posterior gill generally present. 



Foot with a median tubercle. 



Proboscis and buccal mass relatively small and 

 slender. 



This genus is based upon two species (N. inopinata 

 and N. macdonaldi) described by Pelseneer (1888), charac- 



l ) In the two other genera of this family, this row of spines is continued on each side into a series of single spines, forming together 

 a line bordering the entrance of the buccal cavity. 1 have not been able to determine with certainty whether such a line may be present 

 also in Notobranchaea. 



