i»o. 2217. THE GENUS EPITONIDM AND ITS ALLIES— DALL. 487 



EPITONIUM THYLAX, new species. 



Shell small, white, soUd, with 8 sharp -edged solid continuous 

 varices ; nucleus conic with three smooth whorls ; subsequent whorb 

 seven, feebly spirally striate, needing strong magnification to make 

 it out; varices not descending deeply into the suture, nearly parallel 

 with the axis, without angulation or spines; there is no basal disk or 

 cord, the aperture is ovate, the base imperforate. Height, 6.25; 

 diameter, 2.6 mm. U. S. Nat. Mus. Cat. No. 324465. Range, 

 beach at Panama, James Zetck. 



This species except for its spiral striation recalls in miniature such 

 forms as cookeianum, hexagonum, etc. 



The following species are not represented in the collection of the 

 United States National Museum. 



SCALARIA ACICULINA Hinds, 1843. 



This is a slender purple brown species with about 12 arcuate varices 

 and 10 whorls. It is imperforate and the varices are not spinose at the 

 shoulder. The shell is about 8.5 mm. long and is said to come from 

 the west coast of Central America. 



SCALARU VULPINA Hinds. 1843. 



This is about 6 mm. long with about 8 whorls of a reddish brown 

 color, slender, acute, spirally striated, with a strong basal cord, and 

 is said to come from the island of Quibo, Veragua, Central America. 

 The figure suggests a resemblance to S. retiporosa Carpenter. 



SCALARIA CRASSILABRIS Sowerby. 1847 (not ofvon Koenen, 1885). 



Is probably a Philippine shell wrongly reported from Mazatlan. 



SCALARIA GRACILIS Sowerby, 1844. 



Was originally described as a Philippine shell, and its reference 

 to the west coast of America is due to a misidentification. It is not 

 S. gracilis A. Adams, 1862, nor of H. Adams, 1860, nor Verrill, 1880. 

 It is the type of Graciliscala De Boury, 1909. 



CIRSOTREMA FUNICULATA Carpenter, 1857 (not of Watson, 1883). 



Has two spiral ribs on the base and 15 to 20 varices. It is described 

 from Mazatlan and resembles S. diadema Sowerby, 1832, of the 

 Galapagos fauna. 



SCALARIA INDISTINCTA Sowerby. 1844. 



Has fine spiral sculpture and many simple uniform axial varices. 

 It is reported from San Bias and the GuH of CaUfomia. 



SCALARIA MITRAEFORMIS Sowerby, 1844. 



Was described from Guacomayo, Central America. 



