— 131 — 



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

 Humacao et San Juan, locis umbrosis ad folia delapsa. 



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

 priesertim spira conico-elevata bene distincta. 



14. Helix velutiiia Lam. 



Testa perforata, depresse orbiculato-convexa, minutissime sub- 

 reticulatim striata, epidermide liitescente in laminas breves subbul- 

 latini elevata induta, sericeo-nitens^ spira brevissima, obtusa; anfr. 5, 

 convexi, lenle accrescentes, ultimus tumidulus, basi subplanulatusj 

 sutura profunda; apertura lunaris^ perist. simplex, acutum, margine 

 columellari reflexo, subincrassato, perforationem semi-occultante. 



Diam. raaj. 13, min. 11 Vs? ^'t- ^ ™i"' 



Sy7i. Uelix velulina Lam. ed. Desh. VIII, p. 63, NO 75. 

 „ „ Delessert Recueil t. 26, f. 2. 



Hab. Rarissime sub ligno putrido prope Humacao. 

 Obs. Species pulciira, 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 late 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 V2? sensim accrescentes, ultimns ma- 

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

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

 subincrassatum, marginibus subapproximatis, interdum callo junctis, 

 superiore flexuoso. 



Diaro, maj. 21, min. I85 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. Animal, ex observationibus Blauneri, nigrum, viviparum, ple- 



rumque pullos tantum quatuor semel pariens. 



16. Helix diaphana Lam. 



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

 conspicue striatula, nitidula, corneo-lutescens; spira obtusa, sub- 

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

 aperturam paululum deflexus et obsolete constrictus^ columclla alba 

 profunde intrans, strictiuscula, calloso-subdentata; apertura lunato- 

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

 ginera basalem callo albo tenuissime labiatum. 



Diam. maj. 141/45 min. IIV25 Alt. 10 mill. 



Syn. Helix diaphana Lam. ed. Desh. p. 62, NO 73. 

 „ „ Fer. Hist. t. 104, f. 1. 



