fllE NAUTILUS. 137 



circular. Outer lip very narrowly reflexed, whitish, a little thick- 

 ened within. Basal callus moderately spreading, whitish in the 

 middle, elsewhere transparent. 



Alt. 7.8, diam. 9.5 mm. 



Alt. 7.2, diam. 8.3 mm. 



Operculum thin, externally whitish at the nucleus and along the 

 straight margin, a red area around the nucleus, outside of which 

 it becomes pale blue, with a reddish bordering line ; nearly smooth. 

 Inside deep reddish, almost black, fading to whitish along the straight 

 margin and near the nucleus. The straight edge is thickened outside 

 and within. 



Santa Maria Mts., Colombia, at Cacaguelito, at 1500 ft. elevation r 

 on the ground in forest under decaying leaves. 



A small edition of //. sanctamarthce, but differing in the less 

 extensive basal callus, the minute sculpture, narrow lip, thinner 

 shell and operculum. It is more globose than H. tamsiana. The 

 coloring is similar in gome specimens of If. nemoralina of Trinidad,, 

 but that shell has a more globular last whorl. 



NOTES ON THE DISTRIBUTION OF THE PLEURODONTE ACUTA GROUP. 



BY P. W. JARVIS. 



As most of the Jamaican land shells in museums and private col- 

 lections, are usually labelled " Jamaica," a very vague locality, a few 

 notes giving the areas in which some of the species live may not be 

 out of place. 



Belonging to the group of which H. acuta is type, seven species 

 are recognizable : 



1. Pleurodonte itigens (Adams). 



2. Pleurodonte chemnitziana (Pfr.). 



3. Pleurodonte carmellta (Fer.). 



4. Pleurodonte mbacuta ( Pfr.). 



5. Pleurodonte patina (Ads.). 



6. Pleurodonte oxytenes (A. D. Brown). 



7. Pleurodonfe acuta (Lam.). 



and three to the group of which H. bainbridgei is type. 



8. Pleurodonte bainbridgei (Pfr.). 



9. Pleurodonte pretiosa (Ads.). 

 10. Pleurodonle spenghriatia (Pfr.). 



