1891.] THE SHELLS OF PERAK. 341 



52. Cyclophorus borneensis, Mete. 

 Cyclophoi'us borneensis, de Morgan, Bull. p. GO. 

 Kinta valley (rfe Morgan). 



As this Boniean form has been found also in Sumatra, by Piof. 

 von Martens, at Bukit Tima, Singapore, and by Stoliczka in Venang, 

 it may very well range into Perak. Still, a revision of de Morgan's 

 identification would be desirable in this very difficult group. 



53. Cyclophorus semtsulcatus, Sow. 



Bukit Pondong (Townsend) ; Perak generally (de Morgan). 



54. Cyclophorus aurantiacus, Schumacher. 



Cyclophorus aurantiacus, E. von Martens, Shells of Mergui, Journ. 

 Linn. Soc, Zool. xxi. 1887, p. 157, t. xiv. 



Cyclophorus lowi, de Morgan, Le Nat, 1885, p. 69. 



Cyclophorus malayanus, de Morgan, Bull. p. 62 ; v. MolldfF. 1. c. 

 p. 309. 



Larut (coll. Ind. Mus.) ; Perak generally {de Morgan). 



From the able paper of Prof, von Martens I liave convinced 

 myself that the large Perak Cyclophorus does not belong to C. 

 malayanus, but to C. aurantiacus, Schum. C. lowi of de Morgan's 

 first paper is not mentioned in the second ; he seems to have entirely 

 ignored his former publication in the latter. 



Whether C. malayanus, mentioned hy G. Nevill, Handl. 1878, 

 p. 267, as brought from Bukit Pondong by Dr. Townsend, is the 

 true species of Benson or likewise a form of C. aurantiacus, I am 

 unable to say. 



55. Cyclophorus expansus, Pfr. 



Cyclophorus expansus ? var., G. Nevill, Handl. 1878, p. 269. 

 (" Appears to be new ; it is near C. cyheus."") 

 Bukit Pondong {Townsend). 



56. Lagochilus townsendi, Crosse. 



Lagochilus townsendi, Crosse, J. de Conch, xxvii. 1879, p. 208, 

 t. viii. fig. 3 ; de Morgan, Bull. p. 63 ; v. Molldff. 1. c. p. 309. 



Bukit Pondong {Townsend, Hungerford) ; Perak generally {de 

 Morgan). 



57. Lagochilus swettenhami, de Morgan, 

 Lagochilus swettenhami, de Morgan, Bull. p. 64, t. iv. fig. 8. 

 Kinta and Pluss valleys (de Morgan). 



It does not appear whether " Cyclophorus baylei," de Morgan, 

 Le Nat. 1885, p. 69, is identical with tiie first or the second of these 

 species. 



58. Leptopoma aspirans, Bens., Ann. Mag. N. H. 2nd ser. xvii. 

 1856, p. 229. 



Bukit Pondong {Townsend, Hungerford). 



