HELIX-CHLORITIS. 273 



straightened, coluraellar margin violet, triangularly reflexed, half 

 covering the narrow umbilicus. (Pfr.) 

 Alt, 15, greater diam. 29, lesser 24 mill. 



Zamboanga, Id. of Mindanao, Philippines. 



H. Sanziana HOMBR. & JACQ. Voy. au Pol Sud, Moll., t. 4, f. 19- 

 23. PFR. in Conchyl. Cab., p. 423, t. 149, f. 6, 7 ; Monographia 

 iii, p. 240. Chloritis Sanziana SEMPER, Reisen im Archip. Phil., 

 Landmoll., p. 235. HIDALGO Journ. de Conchyl. 1887, p. 109. 

 H. lituus REEVE, Conch. Icon., t. 22, f. 93a, b (but not descript.) 



Semper and Hidalgo have recently confirmed the locality, Zambo- 

 anga. Semper also found the species on the little island Malaunavi, 

 off the north coast of Basilan. 



The diagnosis of Pfeiffer mentions that the surface is granulate. 

 This granulation is probably caused by the fresh shell being hairy. 

 The hair-scars are far closer together than in a denuded specimen 

 of H. spinosissima, and the surface of the shell is much more strongly 

 striate. 



H. SPINOSISSIMA Semper. PL 37, figs. 55, 56. 



Shell umbilicated, depressed, thin, densely covered all over with 

 little spines ; cuticle diaphanous, reddish-chestnut, ornamented with 

 a peripheral band of brown and one of white. Spire depressed, 

 apex plane or impressed ; whorls 5-5 , a little convex, sensibly 

 increasing, the last a little descending in front ; periphery subangu- 

 lated, base convex. Aperture subvertical, subangularly lunar, 

 white within, or bluish; peristome expanded, columellar margin 

 violaceous, triangularly reflexed, half covering the umbilicus. 

 (Semper). 



Alt. 21, greater diam. 36, lesser 29 mill. 



Mindanao, Philippine Is. 



H. spinosissima SEMPER, Reisen im Archip. der Philippinen, 

 Landmoll., p. 234, t. ix, f. lOa, b, and t. xiv, f. 9a, b (anatomy). 

 H. boxalli Sows., P. Z. S. 1888, p. 211, t. 11, f. 13. 



Found at many localities on the Island Mindanao. Semper says : 

 This species stands very near to the H. sanziana, discovered by Hom- 

 bron and Jacquinot at Zamboanga, and I was formerly inclined to 

 consider it a variety of that species. It differs, however, in the 

 greater size, the greater flattening of the whorl above, the thinner 



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