MICROCERAMUS. 161 



Eastern and eastern-central Cuba. Among Cuban species, 

 M. gossei is closely related to M. denticulatus of western 

 Cuba; but it is larger, more slender and more regularly 

 tapering. I have seen a single Cuban specimen, and cannot 

 see that it differs in any respect from the Jamaican typical 

 form. Arango and others give the following localities, all in 

 the western part of the province of Santiago and the eastern 

 part of .Puerto Principe: Guisa and San Andres in Bayamo; 

 Casinuba in Cabo Cruz (Gundlach; Pfr. in Malak. Bl., v, p. 

 44, no. 20) ; Punta de San Juan de los Perros (Gundlach, 

 Zeitschr. f. Malak., 1852, p. 175) , and Nuevitas. Crosse ( J. 

 de C., 1890, p. 205) gives no additional information. 



Haiti. Specimens collected by J. B. Henderson, Jr., at 

 Cape Haitian have the coloration, form and sculpture of 

 Jamaican gossei, but are smaller than most Jamaican shells; 

 length 7, diam. 2.7 mm., whorls fully 9. Crosse reports the 

 species, with doubt, from sandy places in the valley of the 

 Yaqui river, in the northern part of the Republic of Santo 

 Domingo, collected by Hjalmarson. 



la. Var. PROVIDENTIA Pilsbry, n. v. PI. 26, fig. 16. 



Sutural teeth strong, acute, close and regular; striation 

 stronger. Whitish, sparingly maculate with lunate corneous 

 patches. Length 9.7 to 11.5, diam. 3.2 to 3.3 mm., whorls 

 91/2 to 11. 



Bahamas: Nassau, New Providence (R. Swift coll.). 



8. M. DENTICULATUS (' Gundl. ' Pfr.). PI. 25, figs. 88, 89, 90. 



Shell perforate, ovate-fusiform, thin, closely costulate- 

 striate, whitish variegated with pale corneous; spire ovate- 

 conic, the vertex acute; suture closely denticulate. Whorls 



9, convex, the last tapering, with a thread-like keel below the 

 middle. Aperture oblique, nearly circular; peristome simple, 

 narrowly expanded, the margins converging. Length 7.66, 

 diam. 3.66 mm. (Pfr.) 



Western Cuba: Punta de la Jaula, near Guane (Wright). 

 Macroceramus denticulatus Gundl., PFR., Malak. BL, xi, p. 



