316 BULLETIN OF THE 



Kingston, Jamaica, in three or four fms., mud, C. B. Adams. Probably 

 resembles C. operculata Philippi. [It is quite distinct from operculata (= dis- 

 parilis Oih.). — W.B.. D.] 



Corbula Chittyana C. B. Adams. 



C. Chittijana Ad. Contr. to Conch., p. 238, 1852. 



Plate n. Figs. 6 a - 6 d. 



This species resembles C. Barrattiana, but differs in being very thick and 

 solid, very wide, and in having two periods of growth, like C. Dietziana : it is 

 also more inequivalve. Lon. 8.5; alt. 5.75; diam. 5.5 mm. 



Habitat. Kingston Harbor, Jamaica, in 4-5 fnis., mud, rare; Adams. 



Corbula Kjoeriana C. B. Adams. 

 C. Kjoeriana Ad. Contr. to Conch., p. 237, 1852. 

 Plate I. Figs. 6, 6 a, 6 b. 



This species differs from C- Swiftiana in being less distinctly rostrated 

 though usually a little more elongated behind ; the concentric ridges are 

 stouter and are continued into the lunule; both valves are sculptured alike ; 

 the umbonal angle is more acute and distinct, and is a little more distant 

 from the posterior dorsal margin. Lon. 12.0; alt. 7.5; diam. 4.5 mm. 



Habitat. St. Thomas, Bland; Jamaica, 4-5 fms., mud, Adams. 



Genus BASTEROTIA Matek. 



Basterotia quadrata, var. granatina, Dall. 



<iCorbula quadrata Hinds, Reeve, Conch. Icon , Corbula, fig. 40, 1843. 



Poromya ? granatina Dall, Bull. M. C. Z., IX. p. 109, 1881. 



? Basterotia corhuloides Mayer, Hurnes, "Wiener Beck., p. 40, pi. iii. fig. 11, 1866. 



Plate I. Figs. Z, Z a, Z b. 



Habitat. Yucatan Strait, 640 fms., one valve. 



After further investigation it became evident that the shell above referred 

 to was only one of the rather numerous varietes of Corbula quadrata Hinds. 

 This form belongs to the genus Eucharis Recluz, 1850, not of Latreille in 

 1804, or of Peron or Eschscholtz of later, but still prior dates. I believe 

 Mayer's name is the first which has been applied to it which is valid. Mayer's 

 species appears (as he admits) hardly different from the living West Indian 

 and Pacific shell, which I have seen even from Korea! 



