432 Mr. R. J, L. Guppy on the Terrestrial 



growth somewhat sinuate ; whorls (? about five or six) little 

 convex, the last narrow and forming half or more of the length 

 of the shell ; aperture narrow, rather produced anteriorly, 

 elongate oval ; peristome simple, a little effuse anteriorly, its 

 margins joined by a thin callus on the body-whorl ; columella 

 reflexed over the narrow umbilical fissure. 



I obtained a single living example of this species ; but, un- 

 fortunately, the spire got broken off, so that my description is 

 somewhat imperfect. Nevertheless it seems to be a very dis- 

 tinct species ; and, although very like a Stenogyra in shape, I 

 am inclined to place it rather with Bulimulus. It is, perhaps, 

 allied to B. montivagus, D'Orb. ; but its proportions are much 

 more elongate relatively. 



11. Amjihihulima patula^ Brug. 



More common on the outskirts than in the interior of the 

 forests. 



12. Amphibulima pardaUna, n. sp. 



Testa elongato-ovalis, succinoidea, tenuis, flexibilis, diaphana, leviter 

 decussata, fulvo notata ; anfr. 3 ; spira parva, obtusa ; apertura 

 ampla, ante dilatata ; peristoma simplex, superne inflexum ; 

 sutura descendens. 



Long. 20 millim., lat. 11 millim. : spirse alt. 3 ; aperturse lat. 9. 



An oval-elongate, /9wmwea-shaped, thin, flexible, somewhat 

 diaphanous shell, finely decussate and generally marked by 

 irregular rows of small, elongate, fulvous spots ; having a 

 small obtuse spire and a very large aperture, much dilated 

 anteriorly. The animal resembles that of Omalonyx unguis^ 

 r^-. (D'Orb. Voy. Amer. Merid. pi. 22. f. 1-7). The foot is 

 translucent, like a bit of ice dipped in milk, the internal organs 

 showing as a dark variegated patch about the shell, into which 

 the body is incapable of retraction. It lives buried in the very 

 thick moss on the trees in the higher regions of the forest, 

 where the vegetation is always dripping with moisture. A. 

 pardalina is very near to A. tigrina (Lesueur) ; but the dif- 

 ferences induce me provisionally to assign a new name to the 

 Dominican shell. 



Forming my judgment from the soft parts and the lingual 

 dentition, I should separate AmpMhidima as a genus from 

 Succinea. The genus AmpMhulima might then be divided 

 into the following groups : — 



Amphibidima s. strict. Type A. patula. 



Omalonyx^ D'Orb. Type A. unguis. 



Brnchyspira, Pf. Types A. imrdcdina and A. tigrina. 



