FAUNA OF OETHAULAX PUGNAX ZONE. 57 



stout, equal and equally spaced plaits, the anterior on the edge of the 

 pillar at the narrow and shallow canal. Length 8, maximum diame- 

 ter 5 mm. 



Tampa silex beds at Ballast Point, Tampa Bay, Florida. 



Type-specimen from the Post collection, U. S. Nat. Mus. No. 

 165055. 



MARGINELLA MYRINA, new species. 



Plate 12, fig. 2. 



Shell small, stout, short, smooth, of about 3 whorls, the spire, 

 nucleus, and suture obscured by a rather thick coat of enamel ; outer 

 lip varicose and externally marginate, receding toward the suture 

 and broader toward the middle; aperture rather wide, posterior sinus 

 rounded; outer lip not internally Urate; body with a thin wash of 

 callus; pillar with four distinct plaits, the anterior coincident with 

 the edge of the pillar and with the adjacent plait somewhat larger 

 than the posterior pair, all about equidistant; canal shallow, short, 

 wide. Height 6, maximum diameter 4 mm. 



Tampa silex beds at Ballast Point, Tampa Bay, Florida. 



Type-specimen from the Post collection, U. S. Nat. Mus. No. 

 165056. 



MARGINELLA NEWMANI Dall. 

 Plate 16, fig. 13. 



Marginella newmani Dall, Trans. Wagner Inst., vol. 3, pt. 1, p. 54. pi. 4, 

 fig. 8, 1890. 



Tampa silex beds at Ballast Point, Tampa Bay, Florida ; rare ; 

 Mr. L. G. Newman, U. S. Nat. Mus. No. 112105. 

 This species groups with the last. 



Family VOLUTIDAE. 



SialDfamily C^RICKLLINA-E! Dall. 



Caricellinae Dall, Smiths. Misc. Coll., vol. 48, pt. 3, No. 1663, p. 344, Feb., 

 1907. 



The features of this subfamily were fully set forth in my paper 

 above referred to. One or two changes may be noted here as advis- 

 able. The Valuta stearnsii Dall of Alaska which, from worn speci- 

 mens, was supposed to be referable to Adelomelon proves to have a 

 shelly protoconch, not unlike that of Fulgoraria, and may be re- 

 garded as the type of a new section Arctomelon of that genus. A 

 shell described by Locard in the Keport on the mollusks of the 

 Talisman expedition in 1897, under the name of Latiromitra^ and 

 supposed by him to be related to Latirus, is sufficiently like my 



