52 Mr. E. A. Smith on the 



The specimens from Bilatan and Sibutu agree in every 

 detail with examples from Mindanao. 



3. Lamprocystisj sp. 



Ilab. Bonffao. 



Only two specimens of this species were collected by 

 Mr. Everett. They are more depressed in form than L. myops^ 

 and tlie microscopic concentric stria3 on the base are more 

 apparent. It is likely that these differences will be found 

 persistent, but I deem it advisable at present to await further 

 material before separating this form as a distinct species. 



4. Sitala orchis^ G.-A. 



A^jifafa (?) orc/iw, Godwin-Austen, Proc. Zool. Soc. 1891, p. 40, pi. v. 

 fig. 3. 



Hah. Sibutu. 



There appears to be no difference between the specimens 

 from the above locality and those found at Labuan and 

 Barit Mountain, North Borneo, by Mr. Everett. 



5. Trochonanina hongaoensis. (PI. IV. figs. 2-2 h.) 



Testa depressa, orbicularis, acute carinata, imporforata, fusca ; spira 

 breviter conica, vix couvexiuscula ; anfractus 7, planiusculi, supra 

 suturam angustc impresse margiuati, lente accresccntes, supremi 

 2-3 laivigati, ca^tcri striis incrcmenti obhquis aliisque spiralibus 

 tenuibus sculpti, ultimus acute ct subcomprcssc cariuatus, iuforne 

 haud spiraliter striatus ; apertiu-a obli(iua, utrinque acuta ; peri- 

 stoma roseo-albidum, margine basaU pecuhariter tortuoso ct 

 incrassato. 



Diam. maj. 13| millim., min. 12|, alt. 7. 



Hob. Bongao and Sibutu. 



This species appears to be the same as that identified by 

 Mollendorff as a variety of T. conicoides (Metcalfe), to which 

 he gave the name var. crenulata. It is, however, very 

 distinct from tliat Bornean species in size and form. It more 

 nearly approaches T. paraguensis^ Smith, from Palawan, but 

 is easily separable by comparison. It is smaller, darker in 

 colour, the whorls are less convex, the suture less obvious, 

 and the spire more convex. The aperture also is of a some- 

 what different form, and the basal margin of the peristome is 

 rather more tortuous but similarly thickened. I have not 

 adopted the varietal name crenulata for this species in case it 

 may be different from that described by Mrdleudorff, and, 

 moreover, it does not seem particularly applicable, the creuu- 

 lation at the keel being so very feeble. 



