MVCHOPOMA. 



155 



"A very large specimen measures alt. 0"11 [2*8 mm.], major 

 rliam. 0-OS [2 mm.], bub some are only 0'07 in. [1-75 mm.] in alt. 

 Animal not observed." {Godwin- Austen.) 



Hah. India : Khasi and Xaga Hills, Assam {Godwin- Austen). 



Genus MYCHOPOMA, ^/ajf/oyc^. 



Mychopoma, Blanford, J. A. S. H. xxxviii, 18(39, p. 131; Pfeiffer, 

 Mon. Pneuni. Suppl. 3, 1875, p. 45; Xevill, Hand List, i, 1878, 

 p. 260 (as subgenus of Cijathopoma) ; Fischer, Man. Cotichyl. 

 1885, p. 745 (as section of Cyathopoma) ; Kobolt, Das Tierreich, 

 Lief. 16, 1902, p. 228. 



TyrE, Mychopoma Jiirsutiiin, Blanford. 



Ranye. India, Comoros, New Guinea. 



Shell turbinate, generally covered with a thick, brown, hairy 

 |)eri()stracum ; aperture sometimes crenulated \^•ithill. Operculum 

 llat or nearly so, rather tbick, with a marginal sulcatioa ; composed 

 of an external calcareous and an internal membranaceous layer, 

 both multispiral and united by a spiral lamina at right angles to 

 them, the spaces between the whorls vacant. 



223. Mychopoma hirsutum, Blanford. 



Mychopoma hirsutum (Beddome MS.), Blanford, J, A. S. B. 

 xxxviii, 18t)9, p. 132, pi. 16, figs. 5-5 6 (shell), 5 c, 5 ^)f (oper- 

 culum) ; Hanley k, Theobald, Conch. Ind. 1875, pi. 136, ligs. 1,4; 

 Pfeitler, Mon. Pneuni. Suppl. 3, 1875, p. 45 ; Theobald, 

 J. A. S. B. xlv, part 2, 1876, p. 185; id., Cat. Shells Brit. India, 

 1876, p. 38; Kobelt & Miillendorff, Nacin-. Dents. Malak. Ges. 

 xxix, 1897, p. 120; id.. Cat. Pueum. 1899, p. 32: Kobelt, Uas 

 Tierreich, Lief. 16, 1902, p. 229. 



Cyathopoma {Mychopoma) hirsutum, Nevill, Hand List, i, 1878, 

 ■p. 260. 



Original description : — " Shell urabilicated, depressly turbinate, 

 rather solid, covered with a tbick dark coloured epidermis, which 

 has strong raised decussated sculpture of spiral ridges and very 

 close oblique costulation ; at the periphery and around the 

 umbilicus tiiere is a fringe of close, rather long hairs, and the 

 outer series continued on the inner uhorls forms a sutural fringe 

 also. Beneath the epidermis the shell is white with decussating 

 lines, the spiral sculpture being more pronounced and the 

 ribbing corresponding to the lines of growth less so than 

 outside the epidermis. Spire couvexly conoid, the apex 

 ])rominent and papillar, suture deep, nearly concealed by tlie 

 hairy fringe within. Whorls o-5|, convex, the last cylindrical, 

 descending but very little in frout. L'mbilicus pervious, exhibi- 

 ting all the whorls, spirally ribbed, partly covered by the 

 surrounding hairy fringe. Aperture diagontil, round, rather 

 )nilky inside, with dark horizontal lines corresponding to the 

 spiral ribs on the shell ; the peristome is thick and double, curved 

 biL'kwards near the umbili'-us, the hiternal portion with minute 



