— 39 — 



Hab. Forma typica ad folia Musaram prope Luquillo^ varietas prope 

 Hiimacao et San Juan, locis umbrosis ad folia delapsa. 



Obs. Etiam H. fragili et euclasta; proxime affinis, sed notis allatis, 

 prajsertim spira conico-elevata bene distincta. 



14. Helix velutiiia Lam. 



T'esta perforata, depresse orbiculato-convexa, niinutissime sub- 

 reticulatim «triata, epidermide lutesccnte in laminas breves subbul- 

 latim elevata induta, sericeo-nitens^ spira brevissiraa, obtusa; anfr. 5, 

 convexi, lenie accrescentes, ultimus turaidulus, basi subplanulatusj 

 sutura profunda; apertura lunarisj perist. simplex, acutum, niargine 

 columellari reflexo, subincrassato, perforationem semi-occultante. 



Diana, maj. 13, min. IIV23 Alt. 8 mill. 



Syn. Uelix velutina Lam. ed. Desh. VIII, p. 63, NO 75. 

 „ „ Delessert Recueil t. 26, f. 3. 



Hab. Rarissime sub ligno putride prope Humacao. 

 Obs. Species pulclira, sub tactu quasi velutina, sed nullomodo pi- 



losa ut in Chemn. ed. II, t. 122, f. 7—10 male delineata est. 



15. Helix coiicolor Fer. 



Testa lale et perspective umbilicata, discoidea, laevigata, obso- 

 lete et irregulariter striatula, atrofusca vel castaneo-fulva, strigis 

 saturatioribus interdum notata, nitidiuscula^ spira convexiuscula, in- 

 terdum fere plana; anfr. 5-5 Va^ ßensim accrescentes, ultimns ma- 

 jor subdilatatus, superne depressus, basi convexior ; sutura raedio- 

 cris; apertura oblique late lunarisj perist. simplex, acutum, intus 

 subincrassatum, marginibus subapproximatis, interdum callo junctis, 

 superiore flexuoso. 



Diam. maj. 21, min. I83 Alt 9—10 mill. 



Syn. Helix concolor Fer. Prodr. p. 44, NO 208. Hist. t. 82, f. 2. 

 „ „ Deless. Recueil, t. 26, f. 1. 



Hab. Prope Humacao, Luquillo, et San Juan, eopiosissime. 

 Obs. Aninial, ex observationibus Blauneri, nigrum, viviparura, ple- 



rumque pullos tantum quatuor semel pariens. 



16. Helix diaphana Lam. 



Testa imperforata, depresse semiglobosa, tenuis, diaphana, in- 

 conspicue striaiula, nitldula, corneo-lutescens; spira obtusa, sub- 

 prorainuia^ anfr. 4 convexiusculi, ultimus basi centro excavatus, ad 

 apertaram paululum deflexus et obsolete constrictus^ coluniella alba 

 profunde intrans, stricliuscula, calloso-subdentataj apertura lunato- 

 subovalisj perist. tenue, expansiusculum, intus prsesertim ad mar- 

 ginem basalem callo albo tenuissime labiatum. 



Diam. maj. 14Vi, min. IIV2J ^1*. 10 mill. 



Syn. Helix diaphana Lam. ed. Desh. p. 63, NO 73. 

 „ „ Fer. Hist. t. 104, f. 1. 



