STOMATELLA. V 



ed by the Godeffroy expedition years ago, No. 60696 of the Academy 

 register, furnished these notes. 



The species may be grouped by shell-characters into three or four 

 sections, as follows : 



Group of 8. imbricata Lam. Shell depressed ; aperture excessively 

 oblique ; sculpture consisting of close, equal spiral cords. 



Group of S. sulcifera Lam. Shell globose depressed ; aperture 

 less oblique ; surface nearly smooth, or with alternately larger and 

 smaller spiral riblets, the interstices obliquely latticed by lines of 

 increment. 



Group of S. mariei Crosse. Shell depressed, rather flattened above 

 and below ; aperture quite oblique ; sculpture consisting of numerous 

 spirals, of which several are low carina?, more numerous inter- 

 mediate riblets, and still more numerous interstitial spiral strise; 

 sometimes decussated by growth-lines. 



Group of S. coccinea Ad. Small species, resembling the last group 

 somewhat. 



The first three groups are East Indian in distribution, the last one 

 is West Indian. 



Note: — The diagram on pi. 51, figs. 4, 5, illustrates the method 

 of measurement adopted for the species of Stomatella. The vertical 

 line d. e., is the altitude ; the line /., c. the diameter ; the radii are 

 measured from a. to b. and from b. to c. 



A. Oriental species. 



( Group of S. imbrieata Lam.) 



S. imbricata Lamarck. PI. 55, fig. 62 ; pi. 51, figs. 4, 5. 



Shell very much depressed, solid, white with scattered dots of red- 

 dish ; surface covered with very numerous, close, equal spiral riblets, 

 separated by deep interstices, and closely finely scaly. Spire low, 

 short ; whorls 4, widening with extreme rapidity. Aperture sub- 

 horizontal, transverse-oval, lined with a closely sulcate silvery and 

 iridescent nacre ; columella broad, flattened, a little concave, its 

 dge arched and thin. 



Alt. 18, diam. maj. 34 mill. ; aperture, breadth 24, oblique alt. 24 

 mill. 



Port Adelaide, Port Jackson and Torres Sts., Australia; Java. 



Stomatella imbricata Lam., Anim. s. Vert, vi, p. 209. — Deshayes 

 Encycl. Meth. iii, p. 984, t. 450, f. 2.— A. Ad. in Sowerby Thes. 

 Conch, ii, p. 833, t. 174, f. 1.— Angas, P. Z. S. 1867, p. 218.— Wat- 



