1911.] NATURAL SCIENCES OF PHILADELPHIA. 573 



Messrs. Henderson and Simpson 1 have noted 37 species as occurring 

 in their collections at Montego Bay. Seventeen of these are also 

 in the collection here listed, leaving 23 species of the present list 

 new records for Montego Bay, while about 20 species of their list 

 are not represented in the present collection. They probably in- 

 cluded species from some miles on either side. 



HELICIDiE. 

 Pleurodonte lucerna (Mull.). 



Recent shells were sparingly found at Orange Hill and Rose Mount. 

 Semi-fossil shells were plentiful in the clay-filled fissures in the lime- 

 stone in the Orange Hill gully. It is perhaps extinct at Montego 

 Bay, as all shells found were old. 



Pleurodonte sloaneana (Shutt.). 



Orange Hill and Rose Mount, abundant. It was generally found 

 crawling on the ground, but during very rainy weather was seen 

 ascending the trees in great numbers to escape the wet in the Orange 

 Hill gully. 

 Pleurodonte sinuata (Miiller). 



Semi-fossil in the clay veins in the limestone at Orange Hill 

 gully, also at the cave on the Orange Hill place, imbedded in clay. 

 These semi-fossil shells are smaller than those of the living species 

 found elsewhere in the island. 



Dimensions range from alt. 12.4 mm., diam. 22.5 mm., to alt. 

 16 mm., diam. 27.3 mm. 

 Pleurodonte (Dendrooochlis) aspera (F6r.). 



Orange Hill. The specimens collected had been used by land her- 

 mit crabs, but the species is arboreal and not uncommon in the 

 cocoanut and banana plantations. 

 Pleurodonte (Euryoratera) jamaicensis (Gmel.). 



Orange Hill. Semi-fossil in the clay-filled fissures in the limestone, 

 but probably extinct at this place, though found living somewhere 

 in the vicinity. 

 Zaphysema columella ta (C. B. Ad.). 



Semi-fossil in the clay-filled fissures in the limestone at Orange Hill 

 gully; no living forms were observed; perhaps extinct. 



Proserpinula infortunata (Bland). 



Orange Hill. 



1 Nautilus, VIII, 1894, pp. 1, 19, 31. 

 38 



