THE NAUTILUS. 3 



Pleurodotite sinuosa (Fer.) (Area No. 3). Common on the moun- 

 tains in the eastern half of the ishmd ; often found from 2,000 to 

 3,000 feet above sea level. 



Pleurodonte simpson (Pfr.) (Area No. 4). If this is not a good 

 species, it is the small globose local form of H. sinuata found in the 

 Richmond Valley district, where it abounds to the exclusion of the 

 otlier forms of sinuata. 



Pleurodonte invalida (Ads.) (Area No. 5) is limited to the low- 

 lands of St. Catherine and common all over this district, even in the 

 wooded swamps near the sea. It is found in company with the var. 

 sublucerna of acuta, and possibly is a diminutive or lowland variety 

 of ff. sinuata. 



Pleurodonte anomala (Pfr.) (Area No. 6) is a very remarkable and 

 readily distinguished species, limited to the Manchester district. 

 The var. convexa of Adams occurs at Balaclava. 



Pleurodonte pallescens (Sh.) (Area 7) is limited to the cock-pit 

 country, and very common in the "sink-holes" at Mulgrave, in St. 

 Elizabeth. 



Pleurodonte hronni (Pfr.) (Area 8) is not a common shell, being 

 limited to a few miles of the coast hills on the north side of the island, 

 near Rio Bueno and St. Ann's Bay. 



Pleurodonte sloaneana (Sh.) and P. okeniana (Pfr.) (Area 9) are 

 both distributed throughout this area. P. sloaneana is very common 

 and found living everywhere, whilst P. okeniana (the larger of the 

 two species) is represented by dead shells alone in the southern and 

 eastern parts of this area, and at present only found living at Han- 

 over. 



Pleurodonte picturata (Ads.) (Areas 7, 9, 10, 11, 12). This ex- 

 tremely pretty shell spreads from the cock-pit country through St. 

 James, Hanover, Westmoreland and the western parts of St. Eliza- 

 beth. The var. A. of Adams with the more elevated spire and 

 closed umbilicus, occurs in the western parts of Westmoreland and 

 common near Negril. 



Pleurodonte atavus (Sh.) (Area 11) is very local, limited to low 

 coast hills lying west of Little London in Westmoreland, where it is 

 far from abundant. The arrangement of the teeth on the peristome 

 and general build of the shell at once distinguish it. 



Pleurodonte Undsleyana (Chitty) (Area 11). A few poor speci- 

 mens of this shell come from the same locality as P. atavus. This 



