S6 



markings, with few, if any exceptions, in the epidermis. In the 

 largest variety (a) here described, the effect of the detrition of the 

 epidermis is well shown. Var. k. comes very close upon var. c. of 

 Bulinus chrysalidiformis. The length of this species is 6 inches and 

 under, and the breadth from about 1 to l^th of an inch. 



Bulinus chrysalidiformis. Bui. testd valde productd, suhpupi- 

 formi, subcylindricd, lineis incrementi oblique rugosd ; aperturd 

 subauriculiformi, distortd ,• columelld subrectd, ampld, complanaid) 

 peristomate interrupto ; labia interna expanso, labia externa ex- 

 panse, subrecurva, sapius subconstricto ; umbilica subabsoleto. 



Var. a. Subgracilis, anfractibus 7 subventricosis, ultimo vix subven- 

 tricosiari ; pallide castanea vel brunnescens strigis longitudinali- 

 bus, irregularibus sordide flavis picta ; aperturd intus subalbidd ; 

 labia nigro-purpurascente . 



This variety is curiously marked. In the young shells the co- 

 lours are more pure and distinct, but as the animal becomes aged 

 they are more confused, and run into each other. In both states 

 the upper whorls are transparent, and the two last opaque. 



Var. b. Pallidior, labia hand constricta, ex albido dilute purpu- 



rascente. 

 Hab. ad Puerto Galero- 

 Legit H. Cuming in sylvis. 



The distortion and a shade of the constriction may be traced in 

 the mouth of this variety. 



Var. a. et b. habitant ad Puerto Galero. 

 Legit H. Cuming in sylvis. 



Var. c. subflava, anfractibus ventricasioribus, fascid suturali ulbidd 

 et subpurpured tessellatd ; aperturd ampld, albd, labii margine 

 castaneo-purpurascente. 



The shells of this variety are much less thick than those of the 

 two first, and are nearly transparent throughout ; but it must be re- 

 membered that all which I have seen of this variety appear to be 

 younger shells : the body- whorl is also much more ventricose in pro- 

 portion . 



Var. d. Tata jiavescens , labia alba. 



This variety, as well as the last, when held against the light, 

 shows shadings of the longitudinal stripes. 



Var. c. et d. habitant ad Mansalai. 



Legit H. Cuming in sylvis. 



*^* Bulinus chrysalidiformis of G. B. Sowerby (Zool. Proc. 1833, 

 p. 37) is a faded shell of var. c. or d. It is without epidermis, and 

 entirely white, except the margin of the lip, which is brownish. The 

 length of this species varies from 2^ths inches to 2^ths, and the 

 breadth from l|ths to l^th. 



" The shells which I have here attempted to describe were collect- 

 ed by Mr. Cuming in deep and dark forests of thick foliage, some 

 upon, and others beneath, the leaves of trees. There were no palms 

 in these forests. 



