THE NAUTILUS. 63 



C. thysanoraplie (Sowerby). C. banksianus (Sowerby). 



C. jayanus (Ads.). C. yallaliensis (Ads.). 



C. redneldiaiins (Ads.). C. tectilabris ( Ads.). 



C. bronni (Ads.). C. lamellosus (Ads.). 

 C. chevalier! (Ads.). 



Culobostyhis interruptus (Lam.) (Area No. 12). Living specimens 

 of this species are very rare, and only occasionally found on the Dal- 

 las mountains, but weather-beaten shells are very abundant on Long 

 and Dallas mountains, lying to the north of Kingston. In Mr. Henry 

 Vendrye's list of Jamaican Land and Fresh- Water Shells, it is classed 

 under Choanopoma. 



Cu/obosfyltts humphreyamis (Pfr.) (Area No. 4) inhabits a very 

 wide area, from the Cockpit country in St. Elizabeth and Trelawny, 

 westward to " Silver Spring," in Westmoreland. The differencea 

 between specimens from distant localities are very slight and there 

 seems to be no tendency to vary amongst individuals. 



Colobostylus thysanoraphe (Sow.) (Area No. 6) occurs on the high 

 mountains in the center of the island. Fairly abundant in the Cave 

 Valley district. 



Colobostyhis jayanus (Ads.) (Area No. 7) is common throughout 

 Manchester. This species is somewhat nearly allied to G. thysano- 

 raphe. I have not yet found either any intermediate varieties or 

 both species in one locality. 



Colobostyhis redfieldianus (Ads.) (Area No. 5) occurs in the two 

 parishes of Westmoreland and Hanover. Varies considerably in size 

 and color. 



Colobostylus bronni (Ads.) (Area No. 1). The metropolis of this 

 shell is the highland parts of St. James and Trelawny where it 

 abounds, it is common in smaller numbers throughout these two 

 parishes. 



Culobostyhis chevalieri (Ads.). The typical form of this very pretty 

 shell occurs somewhere in the mountains near Montego Bay. I have 

 not yet found it. Dr. F. A. Sinclair, who has kindly given me speci- 

 mens, did not take note at the time of the exact locality. The varie- 

 ties album and virgatwn of Adams, are found together at Green 

 Island in Hanover (Area No. 13). 



