4 COE 



1857 Stimpson 1 published brief, though accurate, diagnoses of 

 these same genera under the names Emplectonema and T&ni- 

 osoma. Moreover, Stimpson gives as the type of Emplectonema, 

 E. camillea [= Borlasia camillea Quatr. (1846) = Amphiporus 

 neesii Oersted (1844) = Eunemertes neesii Vaillant (1890)]. 

 Not only this species, but also Stimpson's other species, Em- 

 plectonema niride [= Nemertes gracilis Johnston, 1837], is a 

 typical member of the genus named by Vaillant more than 

 thirty years later. With these facts in mind it is obvious, as 

 has been already pointed out by Verrill, 2 that Stimpson's name 

 must be retained. 



The status in regard to Eupolia Hubrecht (1887) is similar. 

 Stimpson named Borlasia quinquelineata Quoy et Gaimard 

 (1833) as belonging to his new genus Tceniosoma, and described 

 as new species T. septemlineatum and T. aquale, which is 

 probably identical with quinquelineatum Quoy et Gaimard. 

 But both of these species are typical of Eupolia Hubrecht. 

 There can be no doubt, therefore, about the identity of the two 

 genera 3 and, as in the case of Emplectonema, Stimpson's name, 

 Tceniosoma, must hold. 



The brevity of some of Stimpson's generic diagnoses, as men- 

 tioned above, is justified by the citation of well known typical 

 species of those genera, and in such cases their validity cannot 

 be questioned. Of his specific descriptions, on the other hand, 

 it is more than likely that some will prove insufficient for an 

 indisputable determination of the species. 



In the preservation of the Nemerteans, I found a 2- to 5-per- 

 cent solution of formalin in sea-water to yield most satisfactory 

 results. Most forms die well-extended if a few drops of for- 

 malin are added to the water in the vessel in which the living 

 worms are contained. The formalin solution preserves the 

 general anatomical and some of the histological features excel- 

 lently, and sharp nuclear stains are easily secured, especially 

 with the epithelial structures. This solution, however, works 



1 Proc. Acad. Nat. Sci. Philadelphia, 1857. 



2 Trans. Connecticut Acad., vni, p. 413, 1892 ; ibid., ix, p. 146, 1895. 



3 Burger states distinctly in his great Monograph (p. 26) that " Tceniosoma 

 deckt sich mit Eupolia," but, for some reason, does not consider Stimpson's 

 diagnoses valid. 



