334 DU. O. F. VON MOELLENDORFF ON [JunC 2, 



19. Hemiplecta striata, Gray, var. leechi, de Morg. 

 Hemiplecta leechi, de Morgan, Bull. p. 31, t. i. fig. 9. 

 Abundant all over Perak (de Morgan). 



The author compares his form with H. crossei and H. weinkavffiana ; 

 I think, however, that it will prove to be a variety of the common 

 species of Singapore and the Straits generally, Nanina striata, Gray, 

 or Helix naninoides, Benson. 



20. Hemiplecta sakaya, de Morg. 



Oxt/fes sakaya, de Morg. Bull. p. 32, t. ii. fig. 1. 



Mt. Kerbou, 1200 metres altitude. 



Allied to S. cymatium, Bens., of which it is perhaps a variety. 

 The specimen collected by Dr. Hungerford and mentioned by me 

 {I. c. p. 302) as H. cymatium, probably belongs to this form. 



21. Rhysota sp. aS. pluto, Pfr. 

 Cf. v. Mcilldff. 1. c. p. 302. 

 Perak {Hungerford). 



22. Ariophanta kintana, de Morgan. 

 Ariophanta kintana, de Morg. Bull. p. 33, t. ii. fig. 2. 

 Kiuta district {de Morgan). 



This was probably mentioned by Nevill (Handl. Moll. lud. Mus. 

 1878, p. 20) as Ariophanta, n. sp. (prox. A. interruptce), from Qualla 

 Kangsa, Perak. 



Ariophanta lahatensis, de Morgan, Bull. p. 34, t. ii. fig. 4, be- 

 tween Lahat and Ipoh, Kinta valley, seems to be based on an 

 immature specimen, which might very well be the young of the 

 present species. 



Fam. Trochomorphid^. 



23. Trochomorpha timorensis, v. Mart. 

 Trochomorpha timorensis, de Morgan, Bull. p. 35. 



Mt. Tchora, Kinta valley {de Morgan) ; Penang {Stoliczka). 



Helix swettenhami, de Morgan, Le Naturaliste, 1885, p. 68, and 

 H. thieroti, de Morgan, ibid. p. 68, both belonging to either Trocho- 

 morpha or else Plectotropis, do not appear in his second memoir. The 

 latter species probably is the one now mentioned as T. timorensis. 



Fam. Helicid^. 



24. SAisuMA perakensis, Crossc. 



Geotrochus perakensis, Crosse, J. de Conch, xxvii. 18/9, p. 199, 

 t. viii. fig. 4 ; de Morgan, Bull. p. 38. 



Helix perakensis, v. Mblldif. I. c. p. 303. 



Perak {Townsend) ; Kinta valley {de Morgan). 



Most decidedly not a Geotrochus, but one of the conical Fruticicola- 

 like shells, for which Adams created the subgenus Salsuma {:=Fruti- 

 ootrochus, Kob.). This gronp is widely spread over Eastern Asia, 



