453 Zuoluyical Society. 



breviter soluto ; umbilico mediocri, pro/undo, angulo cariniformi 

 cincto ; aperturd subverticali, ovato-subcirculari ; peristomate con- 

 tinuo, shnplice, recto, margine columellari expansiusculo. — Oper- 

 culum duplex, lumind eocternd testaced, 5-spiratd, marginibus 

 anfractuum liberis, internd plana, cartilagined. 



Diam. maj. 11, min. 9f, alt. 1)-| mill. 



llab. Honduras. 



15. Cyclostoma fasciculare, Pfr. C testd perforatd, acumi- 

 nato-ovatd, soliduld, confertissimi costulato-striatd, vix sericed, 

 griseo-corned ; spird conicd, acutiusculd ; suturd costularumfasci- 

 culis crenatd ; anfractibus 5, convexhisculis, ultiino rotundato, basi 

 spiraliter sulcata ; aperturd vix obliqud, ovali ; peristomate sim- 

 plice, recto, acuto. — Operculum tcrminale, testaceum, planum, 

 paucispirujn, anfractibus oblique striatis. 



Long. 12, diam. 8 mill. 



Hab. ? 



> 16. Cyclostoma Guatemalense, Pfr. C. testd perforatd, ob- 

 V, longd, soliduld, subtruncatd, striatuld, olivaceo -fused ; spird con- 

 vexiusculo-turritd ; anfractibus 6, parum convexis, ultimo angus- 

 tiore, antice descendente, breviter soluto, basi, circa perforationem 

 apertam, comprcsso, nee carinato ; aperturd verticali, subcirculari ; 

 peristomate libero, albo, duplice : interno continuo, vix porrecto, 

 externa dilatato, horizontaliter expanse, supra perforationem 

 exciso. — Operculum 1 

 Long. 24, diam. 8 mill. 

 Hab. Vera Paz in Guatemala. 



17. Cyclostoma CANESCENS, Pfr. C. testd suhperforatd,oblongo- 

 iurritd, truncatuld, solidd, lineis longitudinalibus et spiralibus 

 elevatis regulariter clathratd, parum nitidd, griseo-albidd ; spird 

 elongatd; suturd tuberculis confertis, albis crenatd ; anfractibus 

 superstomate 7, vix convexiusculis, ultimo basi attenuato, circa 

 jjerforationem obsoletam distinctius spiraliter svlcato ; aperturd 

 verticali, angulato-ovali, intus fusco-carned ; peristomate dujdice : 

 interno vix porrecto, externa undique breviter expanso, superne 

 angulata, anfractui penultimo breviter adnata. — Operculum I 



Long. 20, diam. 7 mill. 

 Hab. ? 



18. Cyclostoma vioLACEUM, Pfr. C. testd subobtecte perforatd, 

 ovato-turritd, truncatd, soliduld, lineis elevatis spiralibus et con- 

 fertioribus longitudinalibus oblonga-granulatd, baud scabrd, nan 

 nitente, saturate violaced; spird turritd, truncatd; anfractibus 

 superstomate 4\ , convexis, ultimo rotundato ; aperturd subverticali, 

 ovali ; peristomate simplice, albo, continue, margine dextro sub- 

 incrassato, anguste angulatim patente, columellari in laminam 

 sinuosam, perforationem occultantem, nee claudentem, dilatato. — 

 Operculum immersum, testaceum, planum, cinereum, paucispirum. 



Long. 20, diam. 11 mill. 

 Hab. ? 



