58 Mr. E. A. Smith on the 



There are three varieties from these islands, but they all 

 occur on Bilatan : — 



1. Of a pale horn-colour, variegated with light brown 



wavy markings ; peripherial keel pale. 



2. Coloured like no. 1, but marked with a distinct infra- 



peripherial brown zone. 



3. Of a uniform dark chestnut-colour, excepting the central 



keel and the peristome, which are white. 

 The two latter varieties were only obtained at Bilatan by 

 ]\Ir. Everett, and variety 1, met with at Bongao and Sibutu, 

 was also found at Bilatan. 



19. Leptopoma vitreum, Lesson. 

 Leptopoma vitreum, Hidalgo, Joum. de Conch. 1888, p. 91. 



Hah. Sibutu, Bongao, and Bilatan. 



The examples from these islands are rather small in com- 

 parison with specimens from the Philippines and other 

 localities, and they are separable into five colour-varieties. 

 The uncoloured form was not met with. 



20. Lagochilus quinqueltratus, Mollendorff. 

 (PI. IV. figs. 10,10 a.) 



Lagochilus quinqueliratus, MollendorfF, Jalu-b. deutsch. mal. GeselL 

 1887, p. 286. 



JIab. Tawi-Tawi, Bongao, Sibutu (Everett) ; Bongao 

 {Mollendoi'ff) . 



21. Piipina ottonisy Dohni. 



Pupina oftonis, Dohrn, Sowerby's Tbesaurus, Pupinidnc, pi. iii. fig. 25 ; 

 Keeve's Coucb. Icon. vol. xx. pi. iii. fig. 2o ; Kobelt in Seuiper's 

 Reisen im Arcb. Pbilippinen, pi. vii. fig. 19. 



Hah. Bongao and Tawi-Tawi. 



Some examples are entirely devoid of colour, being quite 

 pellucid, but others are of the normal bronzy-brown tint. 



22. Dq^hmmatina liochcleni, Mollendorff. 

 (PI. IV. figs. 11,11a.) 



Diplommaiina Roebclcni, Mollendorff, Jabrbucb deutscb. lual. Gesell. 

 1887, p. 287. 



Hah. Bongao [Everett and ^[olJendorff). 



