152 PROCEEDINGS OF THE ACADEMY OF [1899. 



prominent oblique nucleus of but little over one whorl. Trans- 

 verse ribs 26, slender, prominent, oblique (inclined to the right), 

 with a decided angle at the shoulder of the whork, and extending 

 over the periphery of the body- whorl, gradually decreasing in size 

 on the base. Interspaces wide and deep, crossed on the last whorl 

 by 5 (sometimes 6) about equal and evenly spaced, raised, rounded, 

 spiral lines, the first just at or a little below the shoulder, and the 

 last just at the periphery; under the microscope they appear to 

 render the sides of the ribs very irregular and the alternating 

 spaces are crossed by scarcely discernible striae. Base elongate, 

 ornamented between the ribs by 4 more prominent, widely sepa- 

 rated, raised, spiral lines, below which there are ill-defiued fine 

 ones ; aperture ovate ; peritrerae continuous. 



Length of the largest specimeu, 3 mm.; diameter, 1 mm.; 

 length of aperture, about -| mm. 



Five specimens of this very distinct species were found at Ber- 

 muda by Prof. Verrill and party, 1898. 

 Turbonilla pupoides d'Orbigny. Plate VIII, fig. 5. 



CJiemnitzia pupoides d'Oib., Hist. I'lle de Cuba, i, p. 224; atlas, PJ. 

 XVI, figs. 32-36, 1853. 



Chemnitzia {3Iumiola) pupoides Morch, Syn. Moll. Mar. Ind. occid.. p. 

 164, 1875. 



Turbonilla piipoides Tryon, Manual, viii, p. 332, pi. 76, fig. 26, 1885. 



? Odostomia phrikalea Watson, Report Voy. Challenger, Zool. Scapho- 

 poda and Gasteropoda, xv, p. 493, Pi. XXXII, fig. 7, 1885. 



A single specimen (No. 72,056) in the E. Swift collection, with- 

 out locality, was labelled as this species, but is too poor to identify 

 with certainty. It has 7 flattened, regularly increasing whorls 

 below the apparently blunt, little raised, tilted nucleus, and in 

 form and size agrees with d'Orbigny' s figure. 



The 24 straight, prominent, transverse ribs are perpendicular on 

 the upper whorls and oblique (inclined to the left) on the lower 

 ones and extend over the base, gradually decreasing in size. 

 These are separated by wider, deep spaces which, under the micro- 

 scope, appear much deeper near the suture than below, giving a 

 constricted appearance to the whorls without affecting the ribs. 

 Base elongated, rounded, ornamented between the ribs, except on 

 the lowest portion, by about 7 raised, spiral threads separated by 

 nearly uniform, deep spaces. Such lines are represented in d'Orbig- 

 ny's figure, but none are mentioned in his description. The specimeu 



