526 A. E. Yerrill — Marine N^emerteans 



Poseidon affinis Gr'd, p. 258=]y[icrura affinis Ver., vol. viii, p. 428. 



Dr. Girard originally (1854) described this Bay of Fundy species 

 from Stirapson's colored drawings ; his original description is now 

 merely reprinted. The caudal cirrus was evidently overlooked by 

 Dr. Stimpson. In all other respects the brief and imperfect descrip- 

 tion applies well to the bright red Micrura^ very common in the 

 Bay of Fundy, which I have always identified with Girard's species.* 



Cerebratulus cylindricus Pack. ; Gr'd, p. 60=Lineus viridis Yer., vol. viii, p. 



418. 

 Cerebratulus olivaceus Packard; Gr'd, p. 260=C. fuscus Ver., vol. viii, p. 438. 

 Cerebratulus"" truncatus Hubr. ; Gr'd, p. 261 — Lineus truncatus Ter., vol. viii, 



p. 427. 

 Cerebratulus medulatus Hubr,; Gr'd, p. 262=Do. Yer., vol. viii. p. 441. 



This may be identical with C luridus Ver. 



Cerebratulus Spraguei (superfluous new oame) Gr'd, p. 262 = C. fuscus Yer., 

 vol. viii. p. 438. 



Dr. Girard based this supposed new species entirely on a brief 

 note of its form and color published by mef under the designation 

 *' Cerebratulus, sj?.," in 1873. It is only a greenish color-variety of 

 C. fuscus. 



Cerebratulus augulatus (Ersfc. ; Gr'd. p. 263 =C. fuscus (Fabr.) Yer,, vol. viii, 

 p. 438, pi. xxxvii. 



In my former paper I have given the much involved synonymy of 

 this common Arctic species. It is suflicient to remark here that the 

 Planaria angulata of Fabr., Fauna Gronl., and of Miiller, is an 

 Am2yhiporus (= Cosmocepliala Stimpsoni Gr'd, see., ^. 524), and 

 that Planaria fiisca Fabr. is evidently the present species of Cere- 

 bratulus. I have had specimens of both species from Greenland for 

 comparison with our New England forms. 



The Micrura fusca Mclnt. is a distinct species of Cerebratulus 

 and should receive a new name. I would, therefore, propose to call 

 it Cerebratulus maculosus. 



Polina Stimp. ; Gr'd, p. 264=:Amphiporus. 



Three species were referred to this genus by Stimpson. The first 

 (P. rhomb oidalis) from Australia, and the second (P. grisea) from 



* Dr. Girard refers, on p. 259, to an erroneous quotation that I forroerly made for 

 this species, under the name of Polia affinis. 



\ Report on Invert, of Yineyard Sd., etc., pp. 214, 336. 



