MUSEUM OF COMPARATIVE ZOOLOGY. 233 



it ill polished white shell substance. Th(4 spirals are usually prettily crenu- 

 lated by lines of ^nowth. Tliey vary in number and relative f^ize. The suture 

 is sonietinios more, sometimes less clearly defined by the meeting' of the whorls. 

 It is not cliannelled. The callus of the outer lip varies from pure white to 

 livid rose-color. It is strongly lirate, reiitcted, and thickened. The canal is 

 very shallow. In the adult a more or less thickened callus extends from the 

 posterior commissure to the canal, somewhat irregularly distributed, and except 

 on the keel of the pillar (where it is a little tubercular) reproduces in its ele- 

 vated ridges the sculpture of the surface under it. This callus ou the body 

 agrees with the notches on the rhachidian tooth in indicating a relationship 

 with Cassis nearer than that exhibited by most of the genus. For it Alontero- 

 eato proposed a section Doliopsis, a name preoccupied by Conrad, but there 

 would seem to be good grounds here for a sectional or subgeneric subdivision. 



Eudolium Verrillii n. s. 



Plate XXXV. Figr. 12. 



Shell resembling D. Crosseaniim, and best described by comparison with a 

 specimen of the latter of equal size. 



D, Verrillii is sculptured with strong revolving ribs without the finer inter- 

 calary thread of D. Crosseanum. At the beginning of the last whorl there are 

 five ribs between the sutures in D. Verrillii, and eight primary ribs in the same 

 place in D. Crosseanum. The nucleus in D. Verrillii has no trace of the horny 

 larval shell characteristic of the genus, but it may have been decorticated after 

 having been filled with shelly matter. The spire ascends more evenly in 

 J). Verrillii, and the suture is deeply channelled. There are nineteen ribs at 

 the end of the last whorl, of which five are above the periphery. The ribs are 

 coarsest near the suture and decrease gradually forward. Behind the very 

 broad thick and strong lip is a deep sulcation. Inside, the outer lip is much 

 reflected and has about sixteen coarse cremdations. On the body and pillar 

 is a thick callus deeply grooved and much thickened on the body, and almost 

 making tubular the posterior commissure. On the pillar the callus is ver- 

 miculate. The pillar is formed like that of D. Crosseanum, but shorter and with 

 the callus arched like Oocorys. The outer surface of the specimen has the 

 grayish white of a "dead" shell, and the surface has lost its polish. It has, 

 however, a transverse sculpture granulating the spirals and reticulating the 

 channels, like the sculpture on the shoulder of specimens of Cassis iujiata 

 Shaw. It has five whorls, the last being rounder than in D. Crosseanum, and 

 all very thick and solid. Max. alt. of the shell, 32.0; of last whorl, 27.0; of 

 aperture, 22.0; max. lat. of shell, 24.3 mm. 



Habitat. U. S. Fish Commission Station 2120, in 73 fms., mud, near 

 Grenada, bottom temperature 67°.0 F. 



This shell is easily distinguished from Oozorys by its callus and broad lirate 

 outer lip with a sulcation behind it. as well as by its coarser more Casszs-like 

 Bculpture. Only one dead specimen was obtained. 



