204 H. B. Preston : Ne-iv species of Shells. [Vol. II, 



character which is quite absent in the remaining two and in those 

 in the Warneford collection. There is also a note attached to the 

 British Museum specimens stating that they were found attached to 

 Mytilus, but there is no means of ascertaining how Mr. Warneford's 

 specimens were actually obtained. 



Chlamys andamanicus ^ sp, no v. 



Shell ovate, nearly equilateral, bright orange colour throughout, 

 streaked and flecked especially on the upper part of the shell with 

 white, both valves bearing about 60 fine, closely set, scaly riblets ; 

 auriculce small, very unequal, the anterior large, curved below, 

 the posterior sloping obliquely, both sculptured with scaly riblets. 



Long, . . . . i6*5 mm. 



Lat. .. .. 1375 ,, 



Habitat — Andaman Islands. 



Modiola cymbula, sp. no v. 



Shell elongately trapezoidal, pale yellowish brown, except at 

 posterior end of ventral surface where it is of a pale reddish chest- 

 nut colour, concentrically striate with lines of growth, the pos- 

 terior ventral surface longitudinally wrinkled ; anterior lateral 

 margin almost straight ; posterior lateral margin sloped ; ventral 

 margin contracted towards the middle; umboes small, purple; in- 

 terior of shell pale flesh colour, rapidly deepening to purple and 

 blackish purple towards the dorsal region. 



Long. . . . . 28*25 mm. 



Lat. . . . . 14 ,, 



_ Habitat — Andaman Islands. 



Modiola zebra, sp. no v. 



vShell mytiliform, curved, red elegantly rayed with bluish 

 black inequidistant stripes, stained and polished with rich chestnut 

 at the posterior side of the ventral margin, concentrically striate 

 with irregular lines of growth ; posterior side short, contracted ; 

 anterior side fan shaped ; umboes high, narrow, whitish. 



Long. . . . • 55 mm. 



Lat. . . . , 27 ,, 



Habitat — Andaman Islands. 



Allied to M. gubernaculum, Dunk.,' of which the habitat is 

 unknown ; it is, however, more elongately oblong, and the s^^stem of 

 painting is quite different ; the umboes also are much narrower and 

 higher and do not show the purple colouring so conspicuous in that 

 species. 



Proc. Zool. Soc. London. 1856, p. 361. 



