528 A. E. Verrill — Marine Nemerteans 



appearance it must resemble the young of Cerehratulus Leidyi, but 

 the absence of cephalic slits should easily distinguish it from the 

 latter. 



Nemertes Gr'd, p. 273=Lineus, authors. 



The description of this genus applies to typical species of Linens. 

 Dr. Girard refers to it a true Lineus and an Amphiporus^ neither of 

 which he knew personally. 



Nemertes socialis (Leidy) Gr'd, p. 274=Lineus socialis Yer., vol. viii, p. 424, 

 Nemertes Verrilli Gr'd, p. 274— Am.phiporus virescens Verrill, vol. viii, p. 

 400. 



This species was based by Dr. Girard on the form briefly men- 

 tioned by me as ^^ N'emertes^ sp. undet. (c)," in IS^S.* It was fully 

 described by me under its proper genus, in 1879. It is again enu- 

 merated by Dr. Girard, under my name, on p. 282. 



]yEacronem.ertes gigantea Ver. ; Gr'd=Em.plectonem.a giganteum. Yer., vol. 

 viii, p. 413. 



Dr. Girard's description is a translation of my original one. This 

 generic type has recently been named JEunemertes (Vaillant, 1890), 

 but as Dr. Stimpson, in 1857, named the Borlasia camillea Quatr., 

 as the type of his genus, Emplectonema^ his name should stand for 

 this group. f 



* Report on Invert, of Yineyard Sd., p. 335. 



f This genus includes several south-European species : 



Empledonema Neesii ((Erst. \M^)=Borlasia camillea Quatr., 1846. 



Emplecionema Duoni= Eunemertes Duoni Joubin, 1890, 



Empledonema g7'acih's= Nemertes gracilis Johnst. •,=Nem€rtes balmea Quatr. 



Emplecionema echinoderma^= Borlasia echinoderma Marion, 1874. 



Empledonema 3Iariom= Nemertes Marioni Hubr., 1879. 



Empledonema Antonina (Quatr ) 



Empledonema car cinophila^ Nemertes carcinophilus KoUiker. 



The Nemertes Feronea (Quatr.), which has been referred to Eunemertes by Joubin, 

 appears to belong to another allied genus, lacking cephalic grooves. 



I take this opportunity to state that the genus Diplopleura of Stimpson (1857) 

 is identical with, and long prior to Langia of Hubrecht. 



He gave a sufficiently clear and correct diagnosis of the genus, and placed it in the 

 same section with Cerehratulus and Lineus. His type, D. Japonica^ was from Kago- 

 sima. I personally examined his specimens and colored drawings before they were 

 destroyed in the great Chicago fire. 



The Mediterranean species, D. formosa (Hubr.), was the type of the genus Langia. 

 The two are evidently closely allied. 



Another species, D. Ohockiana, has been described by M. Joubin, as a species of 

 Langia, from Obock. 



