23 



elevata, conico-rotunclata ; anfr. 6-7 convexiusculis, striis perob- 

 liquis exaratis, ultimo obtuse ad peripberiam angulato, prope 

 aperturam compresso : apcrtura parva, transversa, lunata ; pe- 

 ristomate simplici. Long. §, alt. g s poll. Hab. Feejee Is- 

 lands. 



This bears a general resemblance to H. pyramidata ; but with 

 the same diameter, it is less elevated, and more rounded at 

 apex. 



Helix tentoriolttm. Testa parva, elevata, trochiformis, ad 

 apicem rotundata, pallide virescens, oblique et concinne striata, 

 basi in umbilicum mediocrem devexa : spira anfr. 6 planulatis, 

 et carina acutissima, alba, cinctis : apertura subtriangularis, basi 

 rotundata ; labro simplici, ante umbilicum reflexo. Lat. f , alt. 

 T 3 (j poll. Hab. Upolu. 



Its elevated form and rounded summit, resembling a nipple, is 

 very remarkable. 



Helix (caracolla) troilus. Testa variabilis, depresso-conica, 

 sub-discoidea, leviter et obtuse striata, flavescens, subtus convexa, 

 in umbilicum amplum incurvata, carinata ; carina utroque linea 

 spirali castanea marginata : interdum coloribus inversis : spira 

 anfr. 5^- rotundatis : apertura semilunaris, superne angulata ; 

 labro acuto. Lat. f, alt. T 3 g poll. Hab. Samoa Islands. 



Is somewhat like H. explanata, Quoy, but much smaller and 

 more umbilicated, and differently colored. Not unlike H. alpina 

 in form. Some specimens are much elevated ; others have the 

 chestnut color with a yellow line ; and one has the two bands 

 coalescing and covering the whole periphery. 



Helix cressida. Testa variabilis, solida, depressa, lenticu- 

 laris, acute carinata, nitida, dense et acute striata, coloribus flavo- 

 viridibus et castaneis coalescentibus fasciata, infra sub-planulata, 

 umbilico magno et profundo perforata : spira anfr. 5 vix con- 

 vexis : apertura triangularis ; labro acuto ; fauce lilacina. Lat. 

 ^•p, alt. \ poll. Hab. Samoa and Taheiti. 



In some respects similar to H. Troilus, but more lenticular, 

 flatter beneath, the colors are differently disposed, and the surface 

 sculptured with more numerous and much sharper lines. The 

 animal is also different in coloring. Shape very much like H. 

 acies, Fer. but flatter beneath and smaller. 



