224 THE GENERA OF NEMERTEANS. 



32. Amphiporus hastatus Mac Intosh. 



This species is not common at Naples. In six months I 

 received only one specimen , which corresponded to the des- 

 cription given by Mac Intosh. I have only to add that 

 neither the proboscis nor the proboscidian sheath extend 

 as far as the posterior part of the body, such as it is the 

 case in the other Amphipori ; that the two lateral nerves 

 merge into one in the tail by a commissure situated above 

 the intestine , and that the mouth and the opening for the 

 proboscis seem to have coalesced in one opening which is 

 situated ventrally , near the tip of the snout. All these and 

 some other points by which they show to differ from the 

 other species of Amphiporus will perhaps necessitate, after 

 a more detailed study of their anatomy , the establishment 

 of a separate genus for this species and the following. 

 There is a certain probability that Grube established his 

 genus Akrostomum on a spirit-specimen of this species , in 

 which case his generic name might be re-established and 

 more closely defined. However provisionally I propose to 

 leave them with the Amphipori. 



33. Amphiporus pugnax n. sp. 



Different from the former by having no fewer than seven 

 accessory styliferous vesicles in the proboscis and a diffe- 

 rently shaped central stylet as well. 



The colour is a pale vermilion, gradually merging into 

 a greyish white. The body is not flattened but cylindrical 

 as in the foregoing species. Two small eyes seem to be 

 present near the tip of the snout as in A. bioculatus Mac 

 Intosh. Mouth serving at the same time as opening for the 

 proboscis. Externally a small lateral opeuiug is visible. 

 A cephalic furrow was not clearly made out. 



Notes Irom tlie Leyclen. ]Museum. 



