98 CYCL0P1I0K1D.1:. 



137. Pterocyclus aborensis, God win- Austen. 



Pterocyclos aborensis, Godwin-Austen, Rec. Ind. Mus. viii, 1915, 

 p. 498, pi. 39, fig. 1. 



" Shell subdepressedly turbinate, very opeiil}' umbilicated. Sculp- 

 ture, epidermal lines of growtb strong. Well raised distant spiral 

 lirse, botb on upper and lower side. Tbe one next tbe suture tbe 

 most conspicuous, witli two less pronounced intervening, about 

 14 altogether. Colour a rich umber-brown. Spire subconoid, 

 apex snuill. Suture deep. AVborls 5, regularly increasing, 

 angulately rounded on periphery. Aperture circular. Peristome 

 double, not thickeued, slightly reflected, inner lip continuous, tlie 

 outer expanded forv^ardat inner angle into a half closed spout- 

 sba|)ed wing. Columellar margin subvertieally curved. 0[)er- 

 culuni not seen. 



"Major diam. 2(vO ; alt. axis 10-0 mm." (Godtoin-Ansten.) 

 Hah. India: Abor Hills, Ponging ; Eami Lambang (Ort/i-es), 



138. Pterocyclus albersi, Pfeiffer. 



Pterocyclos albersi, PfeifTer, Zeits. Malak. iv, 1847, p. 151 ; id.. 

 Conch. -Cab., Cyclostomacefn, 1849, p. 197, pi. 28, tigs. 1-5; 

 Grav, Nomencl. Moll. Brit. Mus. 1850, p. 12; Pfeiffer, Cat. 

 Plianeropn.l^rit. Mus. 1852, p. 28 ; id., Muu. Pneum. 1852, p. 45 ; 

 Adams, Gen. Rec. Moll, ii, 1855, p. 277; Benson, A. M. N. H. 

 ser. 2, xix, 1857, p. 208; Theobald, J. A. S. B. xxvii, 1858, 

 p. 317; Pfeiffer, Men. Pneum. Suppl. 1, 1858, p. 30; Reeve, 

 Conch. Icon, xiv, 1863, Pteroci/clos,fl. 2, fig. 9; Theobald, Cat. 

 Shells Brit. India, 1876, p. 37 ; Smith, Proc. Zool. Soc. Ifcj78, 

 p. 499 ; Godwin- Austen, Proe. Zool. Soc. 1888, p. 245. 



Cyclostoma albersi, Petit, Journ. Conchy 1. i, 1850, p. 41. 



Pterocyclus albersi, Kobelt & IMollendorff, Naclir. Dents. Malak. 

 Ges." xxix, 1S97, p. 113; id., Cat. Pneum. 1899, p. 25; Kobelt, 

 Das Tierreich, Lief. 16, 1902, p. 161; id., Conch.-Cab., Cvelo- 

 phoridae, ii, 1909, p. 720. 



Origincd description : — " T. latissime umbilicata, discoidea, 

 solidula, striatula, sub epidermide cornea alba, castaneo mar- 

 morata et fascia lata nigricante infra medium circumdata; spiro 

 medio vix elevata ; aufr. 5 planiusculi, sutura profunda, canali- 

 culata discreti, ultimus antice solutus, superne squamoso-carinatus; 

 apertura subcircularis, intus albida; perist. duplex, internum 

 rectum, prominulum, expansiusculum, superne profunde incisum, 

 externum subincrassatum, patens, superne in rostrum antrorsum 

 incurvatum, liberum, postice in cariuam abiens protiactum. — 

 Operculum exfus convexum, spiraliter lamellatum : laniellis inferis 

 spinis erectis confertis coronatis. — Diam, 26, ait. 9 mill.'' 

 (Pfeiffer). 



Hub. Burma: Hlindet. India: Ter'ia Ghat, A ss-.im (T/ieohald). 



E. A. Smith in 1878 questioned the occurrence of this species 

 in India and Burma on the strength of Hanley's statement in 

 Conch, Ind. p. 58, that the shell referred to this species by 



