. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. NEMERTEANS 259 end of the stomach is about twice as thick as the basement layer which is considerably thicker than the circular muscle layer. The longitudinal muscles are well developed. There appears to be no distinction between oeso- phagus and stomach. A large folded tube passes through the region of the brain and opens by a frilled mouth under the proboscis pore. The tube enlarges slightly posteriorly. Branches of the anterior caecum reach the brain. The proboscis possesses thirteen nerves a
. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. NEMERTEANS 259 end of the stomach is about twice as thick as the basement layer which is considerably thicker than the circular muscle layer. The longitudinal muscles are well developed. There appears to be no distinction between oeso- phagus and stomach. A large folded tube passes through the region of the brain and opens by a frilled mouth under the proboscis pore. The tube enlarges slightly posteriorly. Branches of the anterior caecum reach the brain. The proboscis possesses thirteen nerves and is stout and muscular. There is no dorsal strand in the lateral nerves. The cerebral organs are small and only just reach the brain. Their short canals open ventro-laterally. There are about fifteen eyespots on each side. The specimen was a male with immature testes. I have separated this worm from the other Amphi- porids on the nerves in the proboscis and the position and size of the cerebral Fig. 32. Amphiporus inexpectatus, Transverse section at the extreme tip of the head with the protruded proboscis, p. hg, head glands. Amphiporus lecointei, Burger, 1904 a (Plate XVI, fig. 9; Figs. 33-35, 36B)- This species was taken at the following stations: St. 27. 15. iii. 26. DL, nom. 1 (N 114). St. 140. 23. xii. 26. OTL, 122-136 m. 4 (N 45). St. 156. 20. i. 27. DLH, 200-236 m. 2. St. 158. 21. i. 27. DLH, 401 m. 2. St. 159. 21. i. 27. DLH, 160 m. 4. St. 195. 30. iii. 27. OTM, 391 m. 2. St. WS 25. 17. xii. 26. BTS, 18-27 m- 2 (N I20)- St. WS 93. 9. iv. 27. N 7-T, 133-130 m. 6 (N 125). St. MS 71. 9. iii. 26. NCS-T, 110-60 m. 1 (N 115). One specimen (N 45) was examined and sketched in life and afterwards sectioned. This, though similar in many respects to A. michaelseni, Burger, has been separated from it by reason of the cerebral organs, armature and the number of nerves in the pro- boscis. It has been identified with A. lecointei, Burger, on the shape, head glands, br
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