ACANTHOCHITES. 29 



sooty, with 9 whitish tufts. Length 25, width 14 mill. (Rochebr., 

 in Bull. Soc. Philom. Paris, 1881-'82, p. 194.) 



New Holland (Dussumier; Paris Mus.) 



ACANTHOCHITES TURGIDUS Rochebr. Shell small, ovate-oblong, 

 pale buff. Anterior valve elongated, posterior rounded, nearly con- 

 cealed ; intermediate valves rounded, covered throughout with 

 swollen tubercles. Girdle gray, with 9 blue tufts. Length 10, 

 breadth 6 mill. (Rochebr. in Bull. Soc. Philom. 1881-'82, p. 194). 

 New Holland (Peron & Lesueur ; Paris Mus.) 



ACANTHOCHITES JUCUNDUS Rochebr. Shell ovate-elongate, buff, 

 with emerald-green lines and spots. Central areas of intermediate 

 valves smooth ; lateral areas sculptured with radiating beaded lines. 

 Girdle wide, roseate, with 9 green tufts. Length 24, breadth 13 

 mill. (Rochebr. in Bull. Soc. Philom. 1881-'82, p. 194.) 



New Holland (Belligny) ; Cook's Straits (Filhol). Not common ; 

 Paris Mus. 



ACANTHOCHITES STERCORARIUS Rochebrune. Shell elliptical 

 rather flat, dull olivaceous; anterior valve rounded; posterior 

 small, swollen ; intermediate valves with the central area rugose, 

 lateral areas covered with wide, concentric imbricating sulci. Girdle 

 wide, thick, shistaceous, with 9 greenish bunches. Length 22, 

 breadth 13 mill. (Rochebrune, in Bull. Soc. Philomath, de Paris, 

 1883-'84, p. 32, 1884.) 



Cape Roxo, west coast of Africa (Paris Mus.) 



ACANTHOCHITES BELLIGNYI Rochebrune. Shell elongated ; 

 ashen, marbled with white and tawny. Anterior valve rounded 

 elliptical, posterior very minute; intermediate valves having the 

 central areas smooth, lateral areas concentrically scaly, scales 

 spatuliform. Marginal ligament rather wide, brown, with 9 blue 

 bunches. Length 15, breadth 8 mill. (Rochebr., in Bull. Soc. 

 Philom. Paris, 1883-'84, p. 37, 1884.) 



New Caledonia (Paris Mus.) 



ACANTHOCHITES DAKARIENSIS Rochebr. Shell elongated, buff, 

 with a conspicuous black spot ; anterior valve broad, rounded ; pos- 

 terior valve nearly covered, semi-lunate; intermediate valves 

 rounded, scale-shaped, beaked behind, granulose, the granules sub- 

 imbricated ; anterior area of the valves wide, longitudinally sulcate, 

 the sulci chain-like. Marginal ligament wide, pilose, blackish, beset 



