160 



LAND AND FRESHWATER 



either after the distinguished engineer, Col. J. A. Hodgson, who first 

 explored Darjiling and wrote a paper on its topography, which was 

 published in the ' Gleanings of Science,' — or after Mr. Briau Hodgson, 

 formerl)' Resident at the Court of Nipal, and latterly residing at 

 Darjiling, whose diligent investigation of the Mammalia and Birds 

 of those regions is well known to naturalists." 



I give drawing of a typical shell (Plate CIX. fig. 1) in Dr. W. T, 

 Blanford's collection * : sculpture (fig. 1 a) finely decussate ; colour 

 pale ochraceous. It measured 6*9 mm. in major diameter. 



From the Richila Peak I have a large number, some very fine, 

 with the same distinguishing sculpture. The largest measures 

 8 mm. in major diameter ; and these fresh specimens are all of a 

 umber-brown colour, with a slight green tint. I found only very 

 young specimens preserved in spirit. Eight and left shell-lobes are 

 present, the last large (figs. 2, 2 6). Extremity of foot with a long 

 lobe (fig. 2 a). Visceral sac with 4 transverse narrow black streaks 

 (fig. 2 b). Jaw (fig. 2 d) with a central projection ; in the radula 

 (fig. 2 c) the central and admedian teeth are narrow and long, one 

 cusp on outer margin ; laterals bicuspid and even. Formula : 



50 . 2 . 7 . 1 . 7 . 2 . 50 about 

 59 . 1 . 59 



Macrochlamts roeida, Bs. (Plate CIX. figs. 3, 3a, 3b.) 



Helix rorida, Benson, Ann. & Mag. N. H. 1859, iii. p. 266; Pfr. 

 Mon. Hal. vol. v. p. Ill (1868) ; id. Malak. Blatt. 1859, p. 21. 



Microcystis (sec. B. Perforatae, a. Ecarinatte) rorida, Clessin, 

 Nomen. Helic. (1881). 



Macrochlamys (sec. D) rorida, Theob. Suppl. Cat. p. 19 (1876). 



Nanina {Microcystis) rorida, Nevill, Hand-list, no. 166, p. 38. 



Localitij. Darjiling (TF. T. Bhinford: No. 33 of his collection). 



Shell (fig. 3, typical specimen) ; sculpture smooth to the eye, but 

 with regular spiral furrowing under high power ; colour olivaceous 

 green. 



Specimen figured ; major diam. 5-5, alt. axis 3*2 mm. 



Original description: — " Testa srd)i)erforata,globoso-depressa, tenu- 

 issima, minutissime radiato-striatida, polita, pellucida, fusco-cornea ; 

 spira depresse conoidca, apice obtuso, sxitura impressiuscula, temd- 

 marginata ; anfractibus 4, convexiuscidis, idiimo ad jjeripheriam 

 convexo, snbius convexiusculo; apertura obliqua, subrotimdato-hmari, 

 peristomate tenui, recto, margine columellari verticali, arcuato, superne 

 hrevissime rejiexo, perforationem fere celante. 



" Diam. major 5, minor 4|, axis 2| mill. 



" Habitat at Darjiling, necnon ad coUem Suuhul [Senchal 

 Peak], 8600 feet. 



" Independently of its smaller size, translucent dark corneous 

 tinge and polish, this shell is distinguished from U. Jiodgsoni, 



* Yellow label ; No. 32. Now in the National CoUeciiou. 



