bO FROCEEDINGS OF THE ACADEMY OF [Feb., 



SOME BEEMUDA OLIGOCH^ffiTA, WITH A DESCRIPTION OF A 

 NEW SPECIES. 



BY J. PERCY MOORE. 



During two visits to the Bermuda Islands in the summers of 1898 

 and 1901, Prof. A. E. Verrill, while devoting most of his atten- 

 tion to marine zoology, was able to gather a collection of Oligo- 

 chseta which adds materially to our knowledge of the fauna of 

 these islands. The character of the collection and the circum- 

 stances under which it was gathered indicate the probable occur- 

 rence of additional forms. Of the six species hitherto recorded 

 from the Bermudas in several of Beddard's papers, all but one, 

 and that the very common and widely distributed Perichceta bermu- 

 densis Bedd. (Pheretima hawayana (Rosa) Mich.), are represented 

 in Pi'of. Verrill's collection. In addition the material includes two 

 species of Pheretima not previously known from the Bermudas, a 

 new species of Enchytrceus and an immature Helodrilus having a 

 combination of characters not known in any hitherto described 

 species, but which is not now characterized because of the lack of 

 suitable material. 

 Enchytraeus marinus sp. nov. 



The alcoholic specimens measure exactly 10 mm. in length and 

 about .7 mm. in greatest diameter. There are 73 somites in the 

 type specimen and 71 in the other, which is crushed at about the 

 middle into two pieces. The prostomium is broadly rounded. 

 Toward the anterior end the length of the somites is about two-thirds 

 their diameter, w'hile the posterior ones become very short, about 

 one-quarter their diameter. The terminal three or four of the 

 latter taper abruptly to the anus. 



AVith the exception of somites III and IV, in W'hich there are 

 three, the ventral sette are two j^er bundle throughout the entire 

 length of the body; but they are absent entirely from I and 

 XII. From II to X, inclusive, the dorsal bundles contain 8, on 

 all other somites 2 setic. All setse are nearly straight externally 

 and strongly hooked within the body wall. They are stout, some- 

 what thickened at the middle, and taper to the ends. Those com- 

 posing each bundle are of equal length and thickness. In the 



