Discovery reports (1934) Discovery reports discoveryreports09inst Year: 1934 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, A, transverse section towards the anterior end of the body, bm, base- ment membrane; cm, circular muscle layer; dv, d
Discovery reports (1934) Discovery reports discoveryreports09inst Year: 1934 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, 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. 330 07'40' S, 40 30'20' E. N 450 H, 2000 (-0) m. 'Scarlet' (N 168). St. 89. 29. vi. 26. 340 05' 15' S, 16° 00' 45' E. TYF, 1000 (-0) m. 'Dull orange' (N 160). St. 100c. 26. 330 20'to 33°46'S, 150 18' to i5°o8'E. TYF, 2500 (-0). 'Bright brick red' (N 167). St. 101. 33°5o' to 340 13'S, i6°04' to i5°49'E. N 450, 1310-1410 m. 'Orange red' (N 164). The sizes in spirit were: Serial Length Greatest breadth Depth No. mm. mm. mm. N 168 20-0 5-o 3'° N 160 7-0 *'3 1-2 N 167 30-0 6-o 4-0 N 164 21-0 5'0 4-0 9-2
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