SCINTILLA. 179 



29. Sc. opauna (f. 41), Desk. — Testa tenuissima, traiislucida, 

 albida, ovali, subcotnpressa, clausa, obliqua ; marginibus dorsali- 

 bus declivis. Obs. A very transparent little shell with sloping 

 dorsal edges, and rather oblique. 



30. Sc. STRIATINA (f. 40), Desk. — Testa parva, tenuissima, hya- 

 line, alba, compressa, clausa, subsequilaterali, concentrice striata ; 

 margins ventrali recto. Obs. Distinguished from Sc. opalina in 

 being more straight and concentrically striated. 



31. Sc. declivis (f. 39), Sowb. — Testa parva, clausa, albida, 

 intus subfusca ; margine dorsali utrinquc declivi ; terminis sub- 

 rotundatis. Obs. A small shell, sloping at both sides, being par- 

 tially transparent; it is tinged from the inside with purplish brown. 



32. Sc. obliqua (f. 35), Sowb. — Testa quam Sc. declivis 

 magis truncala et recta; latere antico brevissimo. Obs. Distin- 

 guished b\* the shortness of the anterior side. 



a 



Sect. III. Species with an hiatus in the latero-dorsal margin. 



33. Sc. hyalina (f. 23, 24), Desh. — Testa ovali, diaphana, 

 pallida, subinflata, subsequilaterali ; terminis hiantibus ; apice 

 inflate Obs. A transparent shell of an oval form, with the mar- 

 gin gapiug at both ends. 



34. Sc. Reevei (f. 29, 30), Desk.— Testa ovali, brevi, pallide 

 lutea, diaphana, inflata; latere postico subdeclivi, latere antico 

 breviusculo truncato ; margine dorsali utrinque hiante. Obs. Oval, 

 short, rather truncated at the anterior side, diaphanous, open at 

 the dorsal edge on both sides. 



35. Sc. Haxleyi (f. 22, 27, 28), Sowb. G. B. 2.— Testa hyalina, 

 ovali, alba; latere postico rotundo, latere antico breviore; margine 

 dorsali, et terminis hiantibus. Obs. A compressed, transparent 

 white species, gaping at both extremities. 



36. Sc. Philippinensis (f. 31, 32), Desh. — Testa quam Sc. 

 Singaporina magis oblonga, rectiuscula ; latere antico magis trun- 

 cato. Obs. More straight and truncated than Sc. Hanleyi. 



37. Sc. crystallina (f. 53), Desh. — Testa parva, traiislucida, 

 fulva; margine dorsali utrinque paululum hiante. Obs. A pretty- 

 little buff-coloured shell, slightly open at the dorsal margin. 



38. Sc. anomala (f. 25, 2o), Desh. — Testa alba, pellucida, 

 compressa, subquadrata ; marginibus dorsalibus paululum hianti- 

 bus. Obs. This little white shell is much like the scale of a fish. 



