368 TESTACEOUS MOLLUSCA. 



behind ; front dorsal edge straightish, scarcely sloping, angulated at 

 the extremity ; front ventral corner and hinder extremity rounded ; 

 umbones prominent ; lunule very small, broadly heart-shaped : inside 

 white, -k'-'h Indian Archipelago. As Reeves paper has priority, 

 this shell, should it not prove fas some suspect J the young of C. nitida, 

 var. (!) must receive another appellation. 



Caedita coebis (t. 18, f. 6), Phil. Sic. 1, p. 55, t. 4,/. 19. Very 

 small, oblique, subtrigonal, longer than broad, peaked dorsally, semi- 

 oval ventrally, subequilateral, thick, more or less ventricose, ochra- 

 ceous - yellow, with external flexuous streaks of reddish brown, 

 densely striated throughout concentrically, the striae undulated by 

 obsolete radiating sulci ; ventral edge arcuated, crenated, rising in 

 front ; ligamental margin curving abruptly downwards ; both ex- 

 tremities rounded, the hinder peculiarly projecting below; umbones 

 very prominent and oblique ; beaks acute, much inclined ; neither 

 lunule nor lozenge. In one valve a single oblique cardinal tooth, in 

 the other two, of which one is compressed and elongated, the other 

 straight and triangular. -£. Mediterranean. 



Caedita aculeata (t. 18, f. 10), Phil, (as Chama a. of Poli, t. 23, 

 /. 23) 1, p. 54, t. 4,/. 18. — Reeve, I. Card.f. 17. Oval-trapeziform, 

 extremely inequilateral, rounded in front, thickish, ventricose or 

 tumid, white, sometimes tinted with pink or flesh-colour upon the 

 radiating ribs, which cover the surface, are from 16 to 20 in number, 

 square-cut, rather narrower than their unsculptured intervals, and 

 closely armed with rather long vaulted scales ; ventral edge sub- 

 arcuated ; ligamental edge straightish or subconvex, slightly elevated ; 

 ligament sunken ; lunule cordate, impressed ; beaks acute, inclined ; 

 inside white. |...^. Mediterranean. 



Caedita pica (t. 18, f. 11), Reeve, Z. P. 1843, p. 191; /. Gar. 

 f. 8. Oblong, subtrapeziform, subtruncated behind ; extremely ine- 

 quilateral, thickish, ventricose, white with dark brown spots or 

 blotches, that are more particularly conspicuous upon the ribs, which 

 radiate over the entire surface. Ribs from 16 to 18, angular in the 

 middle, the hinder ones squamosely nodiferous, the front ones with 

 vaulted scales ; their intervals radiatingly striated, and subdecussated. 

 Ventral edge subarcuated in front, incurved behind ; ligamental edge 

 straightish, rising, forming a very obtuse angle with the very oblique 

 anterior margin. Lunule cordate, brown, impressed. Beaks very 

 acute. Inside white, stained in front with dark brown or chocolate at 

 the dorsal corner. 1J. Philippines. 



Caedita gubeenaculum (t. 18, f. 12), Reeve, Z. P. 1843, p. 191 ; 

 I. Car. f 9. Oblong, dilated and rounded anteriorly, subtruncated 

 behind (the beaks being almost terminal), thick, rather compressed 

 (except the oblique umbonal elevation), rufous-brown, fading to white 



