Zoological Society. 131 



peritremate acuto ; umhilico mediocri ; operculo testaceo, tenuius- 

 culo, anfractibus septem, striatis. 



CyclostomaBrasiliense. Cycl. testd orbiculato-suhdepressd, tenui, 

 albd, opacd ; anfractibus 4-5 rotundatis, transversim striatis; 

 suturd profundiusculd ; aperturd circulari ; peritremate tenui, 

 acuto ; umbilico magno ; ojierculo testaceo, duplicate, extus tenuis- 

 sime spirali. 



Hab. in umbrosis prope Rio Janeiro, Brasilise, 



Cyclostoma GiGANTEUM. Cycl. tcstd orbiculato-subdcpressd, cras- 

 siusculd, albicante ; epidermide corned, fulvd, indutd, apice rufes- 

 cente ; anfractibus 5-6 rotundatis, transversim striatis, striis su- 

 perne validioribus ; suturd distinctd ; stria longitudinaliter im- 

 pressd propc suturam ; aperturd subeffusd, superne angulatd et in 

 canalem inconspicuam subdecurrente ; peritremate subincrassato ; 

 umbilico magno ; operculo lined elevatd spirali, interstitiis oblique 

 striatis. 



Hab. in sylvis prop^ Panamam. 



Cyclostoma corrugatum. Cycl. testd orbiculato-subdepressd, 

 crassiusculd, albidd, apice rufescente ; epidermide tenui, fused, in- 

 dutd ; spird subprominuld, acuminatiusculd ; anfractibus quinque 

 rotundatis, transversim striatis et corrugatis ; suturd distinctd ; 

 aperturd circulari, subeffusd, superne angulatd et in canalem in- 

 conspicuam desinente; peritremate tenuiusculo, margine acutiusculo, 

 latere umbilicali incrassato ; umbilico magno, margine crenulato, 

 intiis transversim striato ; operculo testaceo, extus lamind elevatd, 

 convolutd, intiis corneo, polito. 



Hab. Jamaica. 



Cyclostoma clathratulum. Cycl. testd subglobosd, crassiusculd, 

 obscurd ; spird subconoidali, apice obtusiusculo ; anfractibus qua- 

 tuor ad quinque rotundatis, superne longitudinaliter tenuiter stri- 

 atis, infrd Icevibus ; aperturd subovali, superne angulatd ; peritre- 

 mate incrassato, supra umbilicum mediocre paululilm extenso. 



Hab. apud Yemen, Arabiae. 



Cyclostoma tigrinum. Cycl. testd suborbiculari, conicd, crassi- 

 usculd, Iceviusculd, pallescente, strigis irregularibus, transversis, 

 saturate brunneis pictd ; spird subacuminatd, submammillari ; an- 

 fractibus quinque, raptim crescentibus, rotundatis, plerumque carinis 

 tribus vel quatuor subobsoletis ; aperturd magnd, orbicular i,postice 

 subemarginatd; peritremate refiexo, albo, incrassato, prope ultimum 

 anfractum subinterrupto ; labio columellari subextenso umbilicum 

 mediocre partim tegente ; suturd distinctd ; operculo tenui, corneo, 

 multispirali, anfractuum marginibus lam£llosis. Long. 1*0; lat. 

 1-25 poll. 



Mr. Cuming has collected the following varieties, viz : — 



Var. a. Shell with three rather indistinct spiral ridges ; peritreme 



nearly white. 



Var. b. Shell with three rather indistinct spiral ridges ; peritreme 



dull brown. Found under decayed leaves in the island of Guimaras. 



K2 



