MOLLTJSCA OF IXDIA. 329 



Sole very strongly divided, central area narrow. Large pointed 

 overhanging lobe at extremity of the foot. The right shell-lobe 

 elongate and left shell-lobe triangular, painted, expanding gradually 

 from the edge of the mantle. 



The radula is very similar to that of Durgella mairangensisy 

 vide Vol. I. p. 64, PI. LXXVII. figs. 7-11 (shell, details of anatomy, 

 and radula). 



Family HELICIDJ5. 



An interesting Enlota-Wke Helix, comes from Sikhim on the far 

 north near the great glacier from Kanchinjunga, the anatomy of 

 which is near to that of Eulota, subgenus Cathaica, as given by 

 Pilsbry in his fine work on the Helicidse in the ' Manual of Con- 

 chology,' shown in the shell, the jaw, and radula. It falls also 

 into the distribution of von Mollendorff's section " North and 

 Middle China and Central Asia"; the genitalia, however, are more 

 like those of Hdicostyla butleri, pi. 54. fig. 8, Man. Conch., with 

 the globular mucous gland. The shells of Helicostijla are very 

 different from this Sikhim species. 



Helix radicicoJa, lis., ranges from the N.W. Himalaya to Sikhim ; 

 the animal is unknown, but it is not unlikely to be a Cathaica. 



Genus Eulota, Hartmann. 



Subgenus Cathaica, Mollendorff, 1884, Jahrb. D. M. Ges. p. 339 ; 

 type H. pyrrliozona, Phil. 



Eulota (Cathaica) hookeei, n. sp. (Plate CLII. figs. 1-1 h.) 

 No. 1147 G.-A. Coll. 



Locality. Zemo Samdong, Sikhim {W. Roherf). 



Shell (tigs. 1, la) globosely conoid, rounded below; sculpture 

 none, covered with a strong epidermis ; colour umber-brown ; 

 spire fairly high, sides flat, apex blunt ; suture shallow ; whorls 3^ ; 

 aperture broadly lunate ; peristome thin, very slightly reflected on 

 the columellar margin which is o])lique. 



The aperture was closed with a diaphragm. 



Size : maj. diam. 11*3, min. 9*5 ; alt. axis 9-3 mm. 



I name this after Sir Joseph Dalton Hooker, whose name will 

 ever be connected with Sikhim and his admirable account of its 

 physical features, its fauna, and flora in the " Himalayan Journals," 

 1854. 



Animal (flgs. 1 5, 1 c) ; foot pointed behind, no peripodial groove, 

 surface finely papillate — underside not divided, surface broken into 

 flattened tubercles. The buccal mass (fig. 1 i) globular, with a 

 very strong, flat, and broad retractor muscle ; salivary gland small. 



The generative organs (fig. 1 d). — The penis is a long, rather 

 slender, cylindrical tube, the vas deferens continuous with it ; the 

 retractor muscle, very short to the wall of the bronchial sac, is 



2e2 



