148 Helix Jamaicensis, etc. 



There is a variety of II. Jamaicensis, notice of which I 

 have not* seen mentioned. The aperture is remarkably pro- 

 duced laterally, the columellar margin is oblique, having a 

 very broad callus, with denticles across its edge ; in one of 

 my specimens there are two, and in another three, denticles. 

 In this respect the species shows an alliance with //. aspera. 



This variety has moreover, usually, a small tooth on the 

 parietal wall. Ferussac's figure (Hist., t. 9 B, rig. 10) 

 shows the form of aperture above mentioned. 



The other form of the species, which is generally smaller, 

 has a much less oblique columella, without the broad callus, 

 and the aperture is more oval than lunate. 



Helix obliterata, Fei\ (Eurycratera) . 



In the description of this species (Fer. Hist., 342, N. 

 406, pi. 61, figs. 3-4) the habitat quoted is Porto Rico, on 

 the authority of Mange. In Chemn., ed. 2, and by Pfeiffer 

 (Mon. Hel.), the same habitat is given. 



The late Mr. R. J. Shuttleworth (Diag. n. Moll., 45), 

 referring to the species, says, "ex affinitate maxima cum H. 

 angulata, Fer. verisimiliter Portoricensis, scd nuperrime non 

 inventa." 



Shuttleworth, in his correspondence with me in 1854-5, 

 expressed surprise that Blauner had not found II. oblit- 

 erata, and some doubt as to its specific distinctness from H. 

 angulata. 



v. Martens (Die Heliceen, ed. 2d, 147) assigns, but I do 

 not know on what authority, H. angustata to Haiti and Ja- 

 maica, H. obliterata to Haiti, and II. angulata to Porto Rico 

 and Jamaica, but most certainly neither the first nor the last 

 occurs in Jamaica. 



Mr. V. P. Parkhurst lately spent a few days in Haiti, at 

 Port au Prince and its immediate northern vicinity, where 

 he found not only specimens (dead) of H. bizonalis (see 

 ante p. 81), but one dead specimen of //. obliterata, which 



