1886.] O. F. von Mollendorff— T^ Landslells of PeraJc. 309 



This is most probably a Spiraculum : tlie operculum is analogous to 

 that of the last species ; there is at a short distance from the aperture a 

 small sutural tube bent backwards. The shell is greenish-brown, much 

 depressed, the last whorl slightly solute. Diam. maj. 19, alt, 5 mill. 



31. Ctclophorus malatanus, Bens. 



Larut (Ind. Mus.), Buket Pondong (Dr. Townsend teste G. Nevill, 

 Handl., 1878, p. 267), otherwise known from Penang, Siam, Burma. 



32. Ctclophorus semisulcatus, Sowerby. 



Buket Pondong (Dr. Townsend teste G. Nevill, Handl., 1878, 

 p. 269, err. typ. " C. semistriatus''). 



33. Cyclophords expansus, Pfr., ? var. 



G. Nevill, Handl., 1878, p. 269, " appears to be new ; it is near 0. cyoceus.'' 

 Buket Pondong (Dr. Toivnsend). 



34. Ctclophorus lowi, de Morgan. 



de Morgan, 1. c, 1885, p. 69. 



Kinta valley, common ; Patani. According to the author's remarks 

 this is a fine shell of 55 mill, diameter ; the description is, however, so 

 incomplete that no attempt to compare it to a known species can be 

 made. Not even the colour of the shell is indicated. It may be 0. 

 aurantiacusj Schum., widely distributed in the Malay peninsula. 



35. Leptopoma aspirans, Benson. 



Buket Pondong ( Dr. Townsend, Hungerford)^ Burma, Pegu, Tenas- 

 serim. 



36. Lagochilus townsendi, Crosse. 



Crosse, J. de Conch., xxvii, 1879, pp. 200, 339, t. viii, f. 3, = Lagocheilus, n. sp., 

 G. Nevill, Handl., 1878, p. 282, = Cycloplwrus haylei, de Morgan, 1. c, 1885, p. 69. 



Buket Pondong (Dr. Townsend, B. Hungerford), abundant in the 

 basin of the Perak river, especially in the Pluss valley (de Morgan). 



Mr. Hnngerford brought some specimens from the original habitat 

 which entirely agree with the very exact description of Mr. Crosse. I 

 am rather inclined to consider the Perak shell merely a variety of L. 

 trocJwides, StoL, from Penang to which it is closely related; being, how- 

 ever, unable to compare specimens of the latter, I follow Messrs. Crosse 

 and Nevill for the present. 



So far as can be judged, or rather guessed, from Mr. de Morgan's 

 short remarks on his " Cyclophorus haylei,'^ it is a Lagochilus and most 

 probably identical with L. towrisendi, Crosse. 



