30 ACANTHOCHITES. 



very densely with whitish hairs; bunches 9, glassy, intense green. 

 Length 35, breadth 12 mill. (Eochebr. in Bull. Soc. Philomath. 

 1880-'81, p. 116 ; Journ. de Conchyl. 1881, p. 44.) 



Rocks of Dakar, west Africa (Paris Mus.) 



ACANTHOCHITES JOALLESI Kochebr. Shell elongated, thick, 

 almost always covered with a calcareous incrustation ; anterior valve 

 semilunar ; posterior valve rounded, small ; intermediate valves 

 rounded in front, semi-lunate behind ; lightly scaly at the base 

 only. Marginal ligament very broad, olivaceous, having sparse, 

 whitish long hairs ; 9 wide greenish bunches. Length 24, breadth 

 14 mill. (Eochebr. in Bull. Soc. Philom. Paris, 1880-'81, p. 117 ; 

 Journ. de Conchyl. 1881, p. 45.) 



Coast of Joalles ; rocks of Rufisque, West Africa (Mus. Paris.) 



CHITON ECHINOTUS Blainv. (Diet. Sc. Nat. xxxvi, p. 552). A 

 species said to be from the Ocean coast (of France), figured in the 

 Encyclop. Meth., pi. 163, f. 14, 15, copied from Chemnitz, vol. x, 

 pi. 173, f. 1688. It is practically unidentifiable, but the figures were 

 in all probability drawn from Acanthochites discrepans. 



CHITON POLYCHETUS Blainville. Body very small, oval ; girdle 

 provided with 9 closely placed pairs of large tufts, the spicules equal, 

 silvery. Shell very small ; the disc of the intermediate valves quite 

 large and having 5 nearly equal sides; plates of insertion moderate, 

 unifissate far backward ; that of the posterior valve with 3 nearly 

 equal lobes. Color greenish-brown. (Blainv., Diet. Sc. Nat. xxxvi, 

 p. 553.) 



Seas of New Holland. 



CHITON ROSEUS Blainville. Body oval, a little elongated, sub- 

 vermiform ; girdle much extended, covered with a very great 

 quantity of crowded hairs, concealing the very small tufts of bristles. 

 Bodies of the intermediate valves subtriangular, the anterior 

 summits truncated ; covered with flat tubercles at the sides. Color 

 of the shell rose; the rest of a gray black. (Blainv., Diet. Sc. Nat. 

 xxxvi, p. 553.) 



New Holland. 



Probably a species of Notoplax. 



CHITON SUEURII Blainv. Body small, oval, Oniscus-like. Girdle 

 with 9 pairs of tufts of quite small bristles. Intermediate valves 

 having the body trapezoidal, with a brush-like group of stride in the 



