412 A. E. Verrill — Marine Nemerteans of New England, etc. 



Long Island Sound, Vineyard Sound, Massachusetts Bay, Casco 

 Bay, Bay of Fundy, etc., low-water mark to 25 fathoms, common 

 on muddy bottoms. Noank, Conn., in harbor mud, among eel-grass; 

 Wood's Holl, Mass., harbor mud. 



This species is sluggish in its habits and creeps very slowly. 



Tetrastemma vittatum. Variations. 



Several specimens of this species were taken together at station 

 310, off Cape Cod, in 21 fathoms, 1879. 



These show great variation in the color of the body, which, in 

 some was flesh-color, in others light olive-green, dark olive, light 

 greenish brown, dark olive-brown, and dark smoky brown. All 

 these varieties agree, however, in having the head greenish with 

 the six light vitta? distinctly marked. In all the specimens the four 

 ocelli were detected, but they are so indistinct in the dark specimens 

 that they mnst be sought with care. 



The largest specimens were 50 to 75""^ long; diameter np to 6'""\ 



Tetrastemma roseum Verriii, sp. nov. 



Body round and soft, in extension about 1*25 inches long. Head 

 obtusely conical ; a transverse shallow groove close to the end of 

 the snout ; the jpart beyond the groove is capable of withdrawing 

 under the portion behind it. Ocelli obscure; two behind the groove 

 and (apparently) two very minute ones in front of it. Color clear 

 bright rosy red. 



Length abput 30"""; diameter 3'"'". 



Station 826, off Block Island, in 22 fathoms, 1880. 



This species was met with only once, and then circumstances pre- 

 vented a careful study of its structure. In the foi'm of the body 

 and characters of the head and cephalic grooves it resembles T. 

 mttatuyn V., and if the front ocelli were correctly noted, would 

 appear to be closely allied to it and might even be thought to be a 

 plain red variety, were not that species A'^ery constant in its color 

 markings, the longitudinal vittre being very characteristic. 



Emplectonema stimpson. 



Prodronius, in Proc. Philad. Acad. Nat. Sci., vol. ix, p. 164 [20] 1851. 

 Am2)Mporus ffirsted, Kroyer's Tidds., iv, p. 581, 1844, (? nou Ehr., non Mcintosh). 

 Nemertes Mcintosh, Nemerteans, p. 176, 1873 (non Cuvier, 1817, non (Ersted, 1844, 



no7i Diesing, 1850, nee White, 1850). 

 Macronemertes Verrill, Atner. Jour. Sci., vol. vi, p. 439, 1873. 



