NEMERTEANS 



281 



The alimentary canal opens at the frilled mouth ; there is no oesophagus. The branches 

 of the gut are small but numerous anteriorly, and they reach forward to the brain. 



The proboscis has twenty-four nerves and is armed by the usual curved rod , although no 

 stylets could be seen . The rhynchocoel wall consists of interlaced longitudinal and circular 



Fig. 57. Bathynemertes hardyi, n.sp. A, transverse section towards the anterior end of the body, bm, base- 

 ment membrane; cm, circular muscle layer; dv, dorsal vessel; ep, epithelium; Im, longitudinal muscle layer; 

 In, lateral nerve; ov, gonad; re, rhynchocoel. B, section of the body wall, from A, magnified. 



fibres. The brain is not large. Its structure, with the strands of nerve fibres passing 

 from the dorsal ganglia into the lateral nerves, corresponds with the description given by 

 Brinkmann for B. hubrechti. I could find no dorsal nerve between basement membrane 

 and circular muscles such as Burger, 1907 (1912), describes in DrepanopJiorus pelagicus. 

 The specimen was a female with small eggs. The gonads were only seen towards the 

 ventral side close to the lateral nerves. 



Bathynemertes hubrechti, Brinkmann, 1917 (Figs. 58, 59). 



Four specimens of fair size were collected at the stations given below 



St. 85. 23. vi. 26. 33 07' 40" S, 4 30' 20" E. N 450 H, 2000 (-0) m. "Scarlet" (N 168). 



St. 89. 29. vi. 26. 34 05' 15" S, 1 6° 00' 45" E. TYF, 1000 (-0) m. "Dull orange" (N 160). 



St. 100c. 4.x. 26. 33 20' to 33°46'S, 15 18' to i5°o8'E. TYF, 2500 (-0). "Bright brick 

 red" (N 167). 



St. 101. 15.X.26. 33°5o' to 34 13'S, i6°04' to i5°49'E. N 450, 1310-1410 m. "Orange 

 red" (N 164). 



The sizes in spirit were : 



9-2 



