1891.] THE SHELLS OF PERAK. 331 



a small white Patula-\\ke shell, which from its fine and regular 

 striation, the silky aspect, and the inner varices must be an im- 

 mature Streptaxis, but not identical with the above species. It has 

 a diameter of only 3 mm. and shows already 5y whorls. 



2. ENNEA(T\IlCROSTROPHIA)PERAKENSIS,Godw.-AuSt,& G. Ncv. 



(Plate XXX. figs. 1, la.) 



Ennea peraTcensis, Godw.-Aust. & G. Nevill, P. Z. S. 1879, p. 735, 

 t. lix. fig. 2 (juv.) ; V, Molldff. J. As. Soc. Bang. Iv. 1886, p. 300 ; 

 Ancey, Bull. Soc. Mai. Fr. v. 1888, p. 341. 



Bukit Pondong {Hung erf or d). 



In the remarks on the name of the subgenus to which this 

 species belongs, I have committed the error of writing Martensia, 

 Nevill, instead of Nevillia, Martens. Tbe latter name has been 

 given by Prof, von Martens to a group of Mascarene Enueas (Beitr. 

 Faun. Maur. 1880), but it was preoccupied by H. Adams (P. Z. S. 

 18fj8, p. 289) for a genus of the Rissoidae. The group, which 

 comprises a number of Indian, Chinese, and Mascarene species, 

 I have renamed Microstrophia (Jahrb. deutsch. malakoz. Ges. xiv. 

 1887, p. 22). The Perak species is closely allied to E. stenopylis, 

 Bens. 



3. Ennea (Microstrophia) hungerfordiana, v. MolldfiT. 

 (Plate XXX. figs. 2, 2 a.) 



Ennea hungerfordiana, v. Molldff. 1. c. p. 301. 



Bukit Pondong (Hunger ford). 



4. Ennea (Microstrophia) subcylindrica, v. Molldff. 

 (Plate XXX. fig. 3.) 



T. nnguste perforata, fere cylindracea, albido-hyalina; spira 

 superne conoideo-convexa, apice ohtuso, turn cylindracea. Anfr. 

 7, convexiusculi, costidis verticalihus subdistantibus — 36 in 

 anfractu penultimo — regidariter sculpti, ultimus angustior, basi 

 subcompressus, paullum ascendens. Apertura verticalis, rotun- 

 dato-tetragona ; peristoma latiuscule expansum, dlbo-calloaum, 

 superne continuum, subsolutum, sinuatum, margo dexter ad in- 

 sertionem subito attenuatus. Lamella parietalis valida, longe 

 intrans. 



AH. 275, diam. 1 mm. 



Hob. ad Bukit Pondong leg. cl. R. Hungerford. 



Fam. ViTRiNiDiE. 



5. VlTRINA NTJCLEATA, Stol. 



Vitrina nucleata, Stol. J. As. Soc. Beng. xlii. 1873, p. 23, t. i. 

 fig. 12, t. ii. figs. 4-6. 



Helicarion nucleatus, Tryon,. Man. Pulm. i. p. 177, t. 41. 

 figs. 49-51. 



Bukit Pondong (Hungerford) ; Penang (Stoliczka). 



Tryon places this species in Helicarion, whilst Stoliczka distinctly 

 states it to be a Vitrina. 



