THK NAUTILUS. 65 



Colobostylus nuttii Pils. (Area No. 2), is found on the Coast moun- 

 tains at Braco, near Duncans. 



Colobostylus albus (Sowerby) (Area No. 3). Tlie typical forms of 

 this species inliabit the coast mountains from Port Maria to St. Anns 

 Bay and for a few miles inland. Tlie \i\.r. fuscus of Adams, comes 

 from the John Crow hills in Portland (Area 14). 



Colobostylus banksianus (Sowerby) (Area No. 7). This species 

 has its headquarters in Manchester and spreads for a considerable 

 distance across the borders of St. Elizabeth and through the Cockpit 

 country. 



Colobostylus yallahensis (Ads.) (Area No. 9). The types of this 

 species came from " Roaches Gully," on Creighton Hall Estate, in 

 St. Thomas ; it is also found at one or two other places on the Yal- 

 lalis hills. This species also crops up at Schwallenburg (Area 9 A) 

 on the slopes of Mount Diablo, in St. Anns. I do not know of its 

 having been found anywhere else than in these two small areas. 



Colobostylus tectilabris (Ads.) (Area 10), inhabits the central and 

 southern parts of Manchester. It is widely distributed over this area 

 but not common. 



Colobostylus lamellosus (Ads.) (Area No. 11) is found on the 

 mountains of the South Coast of St. Elizabeth. 



A NEW JAMAICAN COLOBOSTYLUS. 



BY HENRY A. FILSBRY. 



Colobostylus nuttii n. sp. 



Shell narrowly umbilicate, turbinate conic, similar in general shape 

 to C. chevalieri (C. B. Ad.); surface very finely, densely and regularly 

 striate throughout, the striai moi-e spaced and sharp<!r on the early 

 whorls, exactly as in C. albus. Coloration various, but usually consist- 

 ing of a wide, purplish or purple-brown belt, leaving a pale or whitish 

 band below the suture and around the umbilicus ; the penult, whorl 

 or whorl and a half bicolored, the lower part dark, the upper whitish ; 

 the upper whorl always purple-black. 3 to 3^ very convex whorls 

 remain, the summit being truncate. The aperture is vertical, chest- 



