224 Zoological Society. 



24. Helicina sanguinea, Pfr. Hel. testd conoideo-orbiculatd, 

 crassd, punctato-striatuld, opacd, sanguined ; spird brevi, conoided, 

 acutiusculd; anfractibus 4^ plants, ultimo utrinque convexiusculo, 

 medio subangulato ; aperturd obliqud, subtriangulari, altiore quam 

 lata; columella basi antrorsum dentatd, callum tenuem, semicir- 

 cularem retrorsum emittente ; peristomate recto, intus sublabiato, 

 margine basali strictiusculo . 



Diam. 101 altit. 6 mill. 

 Locality unknown. 



25. Helicina (Trochatella) semilirata, Pfr. Hel. testd conico- 

 globosd, solidd, opacd, flavidd, superne confertim albo-liratd; spird 

 conicd, acutiusculd; anfractibus 5^ planius cutis, ultimo convexius- 

 culo, carinato, basi subtilissime concentrice striato ; aperturd perob- 

 liqud, subtriangulari ; columella simplice, immediate in marginem 

 basalem abiente ; peristomate incrassato, angulatim expanso, mar- 

 ginibus callo tenuissimo junctis , supero sinuato. 



Diam. 10£, altit. 7| mill. 

 From Venezuela (Linden). 



26. Helicina Sowerbiana, Pfr. Hel. testd depresse trochiformi, 

 tenuiusculd, lineis imp?'essis spiraliter sulcata, alba ; spird conicd, 

 acutiusculd; anfractibus 6 planiusculis, ultimo subcarinato, basi 

 convexiusculo ; aperturd parum obliqud, subtriangulari; columelld 

 tenui, basi nodiferd; peristomate simplice, angulatim expanso, 

 margine supero sinuato; callo basali tenuissimo. 



Diam. 21, altit. 14 mill. 

 From Guatimala (De Lattre). 



27. Helicina tenuilabris, Pfr. Hel. testd subglobosd, solidius- 

 culd, sublccvigatd, albo et cinnamomeo variegatd et subfasciatd ; 

 spird breviter conoided, acutiusculd ; anfractibus fere 5 planius- 

 cutis, ultimo utrinque convexo, antice vix descendente ; aperturd 

 obliqud, semiovali, intus cerasind, pallido-fasciatd ; columelld re- 

 cedente, angustd, retrorsum in callum tenuem dilatatd, basi imme- 

 diate in peristoma tenue, expansiusculum, abiente. 



Diam. 10, altit. 7 mill. 

 Locality unknown. 



28. Helicina tenuis, Pfr. Hel. testd turbinatd, tenuissimd, vix 

 striatuld, pellucidd, corneo-albidd, rubro obsolete trifasciatd ; spird 

 conicd, acutd ; anfractibus 6 vix convexiusculis, ultimo basi plani- 

 usculo ; aperturd fere verticali, triangulari-semiovali ; columelld 

 brevi, basi retrorsum subdentatd, superne in callum nitidum, cir- 

 cumscriptum, dilatatd ; peristomate tenui, angulatim expanso, mar- 

 gine basali cum columella basi angulum formante. 



Diam. 11, altit. 8| mill. 

 From Yucatan. 



29. Helicina unidentata, Pfr. Hel. testd depressd, tenuiusculd, 

 liris concentricis allernatim validis, obtusis et minoribus cinctd, 

 diaphand, nitiduld, rubelld ; spird vix elevatd ; anfractibus 4^ 

 depressis, ultimo antice descendente, basi medio profunde excavato ; 

 aperturd per obliqud, late lunari ; columelld simplice, retrorsum in 



