30 R- C. Punnstt. [No. 2 



The proboscis sheath extends throughout the length of 

 the worm. 



Alimentary mnal. The oesophagus and rhynchodaeum are quite 

 separate in the pre-cerebral region only joining at the terminal 

 pore. The intestinal diverticulum reaches forwards a little 

 past the posterior limit of the brain. 



The vascular system does not differ from the usual metanemertean 

 plan. 



The exeretory system reaches forwards to the brain region (Pl. I, 

 fig. 12) and backwards nearly to the level where the oesopha- 

 gus opens into the intestine. A single duct occurs on either 

 side at the level of the hinder part of the brain. 



The gonads are not fully developed in any of the specimens ex- 

 amined. The dncts are hardly formed but would apparently 

 be dbrso-lateral in position. 



The nervous system. The structure of the brain shews no special 

 features. The median dorsal nerve is well marked and a 

 supra-anal nerve commissure is present. The cerebral organs 

 aie large and no part of them lies in front of the brain, by 

 the side of which they are found (Pl. I, fig. 12). The cili- 

 ated canal opens ventrally at the level of the anterior limit 

 of the brain. 



20. Ainphiporus inRgnus n. sp. 



Locality. Pysfjord from 500 metres on coral bottom (Lojjliohelia pro- 

 lifera). Temperature 6.3° C, Salinity 35.1 %. Two specimens. 



Extemal features. A large stout form measuring after preservation 

 about 8 cm. in length and nearly 10 mm. in breadth. Colour 

 during life light orange-brown. 



Body tvall. The basement membrane is very strongly developed and 

 is somewhat thicker than the epithelium. The circular muscle 

 layer is also strong and nearly as thick as the basement mem- 

 brane. The longitudinal muscle layer is very powerful, being 

 considerably tliicker than the above three layers together. 

 The gelatinous connective tissue inside is not exceptionally 

 developed. 



The proboscis though stout is not very long. It contains 20 nerves. 

 The central stylet is of the same length as the base. I was 



