83 



loop ; C, the pedicle muscles ; B, the adductor ones ; A, the cardinal 

 muscles. 



Fig. 28. Argiope cistellula, Wood ; interior of both valves as seen in dried speci- 

 mens (much enlarged) ; A, the retractor and pedicle muscles. The posi- 

 tion of the arms and mouth is the same as in A. cuneata, &c. 



Fig. 29. Morrisia anomoides (Scacchi, sp.) ; enlarged : o, the ovaries seen through 

 the transparency of the shell. 



Fig. 30, 31. Rhynchonella nigricans. Sow. sp. ; natural size. 



Fig. 32-34. Orbicula Evansii, Dav. ; enlarged. 



2. Descriptions of eighteen new species of Land Shells, 



FROM THE Collection of H. Cuming, Esq. 



By Dr. L. Pfeiffer. 



1. Helix avus, Pfr. H. testa umbilicatd, depressd, solidd, ob- 

 lique striatuld, nitiduld, pallide fulvd; spird convexd, brevi ; 

 suturd levi; anfractibus 4 vix convexiusculis, sensim accres- 

 centibus, ultimo cai'inato, utrinque convexiore, fascia fiisca ad 

 suturam, pallidaque ad carinam ornato, basi pallido, circa um- 

 bilicum mediocrem, pervium subcompresso ; apertuvd vix obliqud, 

 subtriangulari-lunari ; peristomate craaso, albo, expanso et re- 

 jlexo, marginibus remotis, callo crasso junctis, 



Diam. maj. 37, miii. 31, alt. 18 mill. 

 Hab. in insulis Philippinis. 



2. Helix Emiliana, Pfr. H. testd perforatd, conoideo-lenti- 

 culari, soliduld, supernh confertim costulatd, lineis impressis 

 spiralibus subregulariter gramdatd, opacd, lutescenti-fuscd ; 

 spii-d conoided, vertice elevato, obtusiusculo ; anfractibus 6 con- 

 vexiusculis, lente accrescentibus, idtinio non descendente, coni- 

 presse carinato, basi convexo, radiatim striatulo, nitidulo ; 

 aperturd obliqud, angulato-lunari ; peristomate simplice, recto, 

 margine columellari ad perforationem refiexiusculo. 



Diam. maj. 16, miu. 15, alt. 8 mill. 

 Hab. in insula Ceylon. 



3. Helix Redfieldi, Pfr. H. testd umbilicatd, conoideo-glo- 

 bosd, tenui, irregulariter striatd et obsoletissime decussatd, 

 diaphand, nitidd, fulvo-corned ; spird conoided, obtusuld ; an- 

 fractibus 5\ convexis, regulariter accrescentibus, ultimo in- 

 flato, non descendente ; aperturd parum obliqud, lunato-rotun- 

 datd, altiore quam latd, ititus margaritaced ; peristomate sim- 

 plice, recto, acuto, marginibus remotis, columellari subverticali, 

 sursum dilatato, umbilicum angustum semitegente. 



Diam. maj. 17, min. 15, alt. 14 mill. 

 Hab. Shang Hai, Chinse {Mr. Fortune). 



4. Helix nuda, Pfr. H. testd vix perforatd, conoideo-depressd, 

 tenui, radiatim striatuld, pellucidd, pallide fidvo-corned ; spird 

 conoided, acutiusculd ; suturd impressd, albo-submargitiatd ; an- 

 fractibus 6 convexiusculis, uftitno majore, infiato, non descen- 



