tTRROCYOLUS. 10? 



152. Pterocyclus miriensis, Godiv'm- Austen. 



Pteroci/clos miriensis, Godwin-Austen, llec. Ind. Mus. viii, 1915, 

 p. 498, pi. 39, Hg. 2. 



" Shell depreasedly discoid, very widely umbilicated. Sculpture 

 very strong, regular spiral lira), above aiid below. Colour rich 

 burnt sienna brown. Spire very flatly conic. Suture well im- 

 pressed. Whorls 5, subangularly rounded on the periphery. 

 Aperture circular, sub vertical, just shows above the last whorl. 

 Peristome double, not thickened, slightly reflected, inner li|) thin, 

 continuous, the outer expanded into a wing, openly spout-shaped. 

 Coluniellar margin well rounded. 



" Major diain. 30'0; alt. axis 80 mm." {God win- Austen.) 



Hab. India : Miri Hills. 



153. Pterocyclus nanus, Benson. 



IHerocyclos nanus, I'enson, A. M. N. H. ser. 2, viii, 1851, p. 450 ; 

 Pfeiffer, Mon. Pneum. 1852, p. 47 ; id., Conch. -Cab., Cyclo- 

 stomaceen, 1654, p. 388, p. 388, pi. 49, tigs. 31-33 ; Adams, 

 Gen, Rec. Moll, ii, 1855, p. 277 ; Reeve, Conch. Icon, xiv, 18(33, 

 Pterocyclos, pi. 3, fig. 12; Blanford, J. A. S. 15. xxxv, 1866, 

 pp. 38 & 40; Hanley & Theobald, Conch. Ind. 1870, pi. 49, 

 tigs. 5, 6 ; Theobald, Cat. Shells Brit. India, 1876, p. 38. 



Pterocyclus nanns, Nevili, Hand List, i, 1878, p. 262 ; id., J. A. S. B. 

 1, 1881, p. 146 ; Kobelt & Mcillendoi ft, Nachr. Dents. Malak. 

 Ges. xxix, 1897, p. 114 (nianus, err. typ.) ; id.. Cat. Pneum. 

 1899, p. 26 {nianns, err. tvp.) ; id., Nachr. Dents. Malak. Ges. 

 xxxi, 1899, p. 135; id., Cat. Pneum. 1899, p. 102; Kobelt, Das 

 Tierreich, Lief. 16, 1902, p. 167 ; id.. Couch. -Cab., Cyclophoridae, 

 ii, 1909, p. 730. 



Original description : — " Testa profunda perspective umbilicata, 

 depressa, discoidea, albida. fascia media strigisque uudulatis 

 castaueis superneornata; spiraprominula, saturatiore; anfractibus 

 4| convexis, ultimo supra soluto ; apertura obliqua, circular!; 

 peristomate duplicata, nu^rgiuibus sulco leviter impresso vix 

 discretis, interno superne profunda recteque inciso, exteruo 

 reflexiusculo, supra sinum alam augustam foruicatam, autice 

 breviter descendentem, angulatam, formante. 



" Diam. major 10, minor 8, alt. 5 mill." 



Hah. India: Xilgiris (Jerdon); Anamidhiy (Beddome) ; Southern 

 India (Stolicz/ca) ; ? Salem {Xevill). 



"Possessing a similar deep umbilicus, narrower than in the 

 other known species, it was overlooked as a young and imperfect 

 specimen. On examination it proves to have arrived at its full 

 growth, being allied in tlie characters of the aperture to Ft. rupestri^, 

 nobis, but dill'ering from the smallest varieties of that shell not 

 only in size and in the form of the umbilicus, but also in the less 

 curvature of the incision under the wing, which is moreover less 

 expanded, and does not touch nor cover any part of the preceding 

 whorl. The operculum is unknown." (Benson.) 



