258 



DISCOVERY REPORTS 



The body is more elongated and slender than that of A. gerlachei, though the posterior 

 end of the body is flattened as in this species (Fig. 36 D). The anatomy is similar except 

 that the oesophagus does not open into the stomach until after the brain. This is similar 

 to A. lecointei, but from this form A.falklandicus differs in colour and shape. There are 

 twelve nerves in the proboscis and an accessory armature of two reservoirs with from two 

 to six stylets. Head glands and cerebral subepithelial glands are present and the cerebral 

 organs persist behind the dorsal ganglia. 



Male and female specimens were included in the collection and the ova of the latter 

 contained the "paranucleus" remarked upon by Hubrecht in A. marioni. 



Amphiporus gerlachei, Burger, 1904a (Figs. 31, 36 C). 



This species appears to be fairly common, though it was not captured in King 

 Edward Cove and no sketch was made of the living animal. From a colour note and 

 three series of sections I have identified it with 

 A. gerlachei, Burger. Seventeen specimens 

 taken from the base of a large hollow sponge at 

 St. WS 225 were noted as " bright pink " in life 

 (N94). 



The lengths and breadths of preserved speci- 

 mens were : 35-0, 6-o mm. (N 63) ; 35-0, 5-5 mm. 

 (N64); 30-0, 7-0 mm. (N94); 40-0, 7-0 mm.; 

 50-0, 7-0 mm. 



The anterior end is cylindrical, the posterior 



very flat (Fig. 36C). The oesophagus opens Fig. 31. Amphiporus gerlachei, Burger. Trans- 

 into the stomach in front of the brain (Fig. 31). verse section of the head in front of the brain. 

 In other ways the anatomy corresponds to that " s ' cerebral sube P ithelial S lands ; «> e y es P ot = 



r /i 7 • ■ mi , A?> head glands; p, proboscis; s, stomach. 



ot A. lecointei. 1 here are twelve nerves in the 



proboscis, and the accessory armature consists of two reservoirs with from two to five 

 stylets. The sex was determined in one specimen only — a male. 

 A. gerlachei was taken at the following WS stations: 



WS 225. 9. vi. 28. OTC, 162-161 m. (N 94). 



WS 246. 19. vii. 28. OTC, 267-208 m. 



WS 249. 20. vii. 28. DLH, 166 m. (N 63, N 64). 



Amphiporus inexpectatus, n.sp. (Fig. 32). 



This species is represented by serial sections of a single specimen (N 108) taken at 

 St. WS 231 off the Falkland Islands and not noted in life. The preserved specimen was 

 16-0 mm. long and 2-0 mm. in diameter, round in section and bleached of all colour. The 

 proboscis was protruded but no armature could be made out after clearing. 



Anatomy. The head glands open at the tip of the head above the proboscis pore. 

 They form a thick strand close to the rhynchocoel and do not stain with haematoxylin 

 (Fig. 32). They disappear before the brain. The epithelium at the level of the posterior 



