1894. PROCEEDINGS OF THE NATIONAL MVSEUM 449 



young- to adults, aud tliough several were broken open no vestige of a 

 lamina was observed at any stage of growtli. 



PLEURODONTE (EURYCRATERA) JAMAICENSIS, Cb.initz, var. CORNEA. 



A variety of this species was found at Mandeville, Manchester, 

 rather more delicate in structure tlian the type, and entirely destitute 

 of cohu", the epidermis being horn-colored. 



ADAMSIELLA GRAVANA, 1' fe i Her , var. AUREOLABRA. 



A large number of si)ecimens of what may prove to be a new species 

 were found at Rio Novo, in St. Mary. The aperture is smoother than 

 that of the type, and is of a rich, reddish-orange color; the body of the 

 shell is shining, and very finely decussated under a glass. The species 

 is exceedingly variable, and this may be only a strongly marked variety. 



LUCIDELLA AUREOLA, Fernssac, var. INTERRUPTA. 



This variety is covered with interrupted and slightly wavy, revolv- 

 ing striie, the hraj blotched with white. Duncan's, Trelawney. 



11. — FoHs'd species. 



NEOCYCLOTU.S (PTVCHOCOCHLIS) MAKERI, uew species. 

 Plate XVI, tigs. 1, 2. 



Shell large, depressed, with 5 well-rounded whorls; nuclear whorl 

 wanting in the only specimen found; second, third, and fourth whorls 

 covered with delicate, radiating, zigzag corrugations, which become 

 very much coarser on the last three fourths of the body whorl; the 

 periphery of the latter being almost smooth, the upper surface becom- 

 ing very strongly and irregularly waved toward the aperture; the 

 base and umbilical region having strong folds, which sweep forward 

 obliquely toward the periphery; umbilicus rather wide, extending to 

 the summit of the shell, and exhibiting the volutions; umbilical keel 

 almost entirely wanting, there being two very slight revolving eleva- 

 tions, one at the outer edge of the umbilicus, the other farther out on 

 the base, the area between them being flatteued so that the shell 

 seems to have two faint keels; aperture moderately large; opercnhim 

 unknown. Greater diameter 2.5, lesser 21 mm., height 12 mm. 



Locality and position: stratum of nuirl in the Miocene beds at Bow- 

 den, St. Thomas, Jamaica, associated with marine fossUs. 



I take pleasure in naming this fine spei-ies in honor of Capt. L. D. 

 Baker, president of the Boston Fruit Company, who gave us permission 

 to excavate in the beds, and furnished us men and every facility pos- 

 sible to make our work a success. 



LUCIDELLA COSTATA, mw species. 

 Plate XVI,fig. 6. 

 This is a small species, about one-half the diameter of the average 

 Jj. aureola. There are 5 whorls which are moderately rounded; the 

 Proc. N. M. 94 JO 



