1887.] NATURAL SCIENCES OF PHILADELPHIA. 151 



Common on trees at Upolu. 



A large, solid, white, depressly conical species, with 41 depressed 

 whorls, the last one Avide, obtusely angular, or bluntly carinated on 

 the periphery. The peristome is sharp, and in adult individuals 

 the anterior margin of the basal cellosity forms a crest-like ridge 

 which joins the base of the outer-lip. Diam. 9 mill. 



Mr. Brazier (in P. Z. S.. 1871, p. 822), says Mousson's plicatilis 

 is synonymous with Pfeiffer's H. Norfolkensis, and that Cuming's 

 locality "Norfolk Island" is erroneous. Though the species has 

 several years precedence in publication, and, if they are identical, 

 Mr. Brazier is fully justified in rejecting Pfeifier's name which is a 

 misnomer. 



The descri23tion of Norfolkensis agrees very nearly with the Samoa 

 shell, but no mention is made of the peculiar crest-like basal ridge. 

 The measurements are too large for the latter S})ecies. 

 M. beryllina, (rould. 



Helmna benjUina, Gould, Proc. Bost. Soc. Nat. Hist., 1847, p. 

 202; Exp. Exp. Shells, p. 95, tig. 111. Pfeitifer, Mon. Pneura., i, p. 

 -354. Gray, Cat. Phan., p. 256. {Mesa) H. and A. Adams, Gen. 

 Moll., ii, p. 304. Mousson, Jour, de Conch., 1865, p. 197 ; 1869, p. 

 357 (vsii\ fiavida) ; 1M70, {). 200. Paetel, Cat. Conch., p. 125. Pease, 

 Proc. Zool. Soc, 1871, p. 476. Schmeltz, Cat. Mus. GodefF., v, p. 

 98. 



Gould's typical berijIUiia inhabits the eastern portion of the Viti 

 Islands, and Mousson's var. flamda was found at Tutuila by Dr. 

 Grafle. The latter variety has the spire and base yellowish, the 

 last Avhorl whitish with a yellowish zone. In every other respect it 

 differs none from the Vitian type, which is a large species (9 to 10 

 mill, in diam.), of a solid texture, depressly conoid in shape and 

 rather variable in color : white, greenish-white, flesh-color, frequently 

 with a dorsal red zone. Lip simple and the periphery obtuse. 

 H. interna, Mousson. 



HeUcina interna, Mousson, Jour, de Conch., 1869, p. 358 ; 1870, 

 p. 201, pi. 8, fig. 6; 1871, p. 24. Paetel, Cat. Conch., p. 125. 

 Schmeltz, Cat. oNIus. Godetf., v, p. 99. Pfeiff'er. Mon. Pneum., iv, p. 

 248. Pease, Proc. Zool. Soc, 1871, p. 476. 



This species, which is common to the Viti and Tonga Islands, 

 was found by Dr. Grafle at Savaii. 



A turbinately conical species of a uniform white, or yellowish 

 color, with or without a spiral reddish-brown zone and regular coni- 



