52 PROCEEDINGS OF THE ACADEMY OF 



side cusps ; marginals with oblique bluntly rounded broad cusps, 

 the inner, larger, one bluntly bifid. 



Helix punctata {mix dentimlata), Born. {Dentellaria). 



Martinique. Governor Rawson. 



Jaw stout, arched, ends blunt, catting edge with a blunt me- 

 dian projection, one stout, decided rib on the centre of the jaw, 

 and three less developed separate ribs M each side of it. 



Lingual membrane long and narrow (plate IX., fig. 8). Centrals 

 high and narrow with long, stout median cusps, bearing a point 

 extending nearly to the base of the plate; side cusps subobsolete. 

 Laterals like the centrals, but uns3'mraetrical. Marginals low, 

 wide, subqiiadrate, with one very long, broad, bluntly bifid, 

 oblique denticle, and one smaller, bluntly rounded, side denticle. 



Helix nucleola, Rang. {Dentellaria). 



Martinique. Governor Rawson. 



Jaw thick, arched, ends blunt ; cutting margin with an obtuse 

 median projection. One central, stout rib, denticulating either 

 margin. 



Lingual membrane, as usual in Dentellaria (see H. punctata^ 

 Born), above. 



Helix formosa, Fer. {Dentellaria). 



Antigua. Received mounted from the late Mr. Robert Swift. 



Jaw arched;, ends blunt; several strong, transverse lines of re- 

 inforcement, but no ribs ; a median projection to cutting edge. 



Lingual membrane as usual in the subgenus. (See pi. IX., fig. 8, 

 of punctata.^ Born.) 



Helix badia, Fer. {Dentellaria). 



Received mounted from Mr. Swift. 



Jaw stout, arched ; ends blunt, with about eight decided ribs. 

 Lingual membrane as usual in the subgenus. (See pi. IX., fig. 8, 

 of H. punctata, Born.) 



Pupa rupicola, Say. 



Ohio. A. G. Wetherby. 



Jaw low, wide, slightly arcuate; ends but little attenuated, 

 blunt ; no median projection to cutting edge. 



Lingual membrane as usual in the genus. (See figures of that 

 of eorticaria, pentodon, and badia in L. & Fr. w. N. A., I.) The 

 cusps on the laterals, however, are very much stouter. There are 

 five perfect laterals. 



