. 1 1.1 K.l'l.l IRA. 89 



valves ami teeth an- broken. Tin- ii.L'im-s ln-rr- -/iven an- from 

 Reeve. 



C.*8owi-:i:uiANA Reeve. PI. 13, figs. 67, 68. 



Shell <hlon.i:-ovatr, valves having the lateral areas (ii-pieuously 

 elevated, granoaely ridged throughout, riders of tin- central areas 

 much tiner. Dull yellowish-brown, with a triangular \vhiti.-h 

 along the umbonial summit of each valve. Ligament hornv. 

 CRw.) 



Rio Janeiro. 



Chiton janeirensis Gray, REEVE, Conch. Icon. t. !;">, f. 80. C. 

 sowerbianus REEVE, /. c., in note under species No. 116, May, 1847. 

 Sowerbyi REEVE, /. c., expl. of pi., detail of sculpture, sp. 80. 

 Sower by anus REEVE, I. c., index to Chiton. 



Carpenter says : Seems to me a coarse var. of spinulosa Gray. 

 Rio Janeiro. Very like apiculata, but with more swelling side areas. 

 The sinus represented in the sculptured figure of Reeve is only the 

 part left after the swelling of the sides. With this impression, I 

 did not think it necessary to examine the single specimen in Cum- 

 ing's collection; but on further examination I thought it might be a 

 distinct species and described it thus : Valves arched ; jugum rather 

 rounded ; jugular area finely striate. Central areas having about 

 18 nearly parallel ribs on each side, the interstices decussated 

 between the ribs, which are sharp (not in necklaces). Lateral 

 areas swelling, with 6 to 8 very close rows of coarse granules, inter- 

 calating, and no spaces between. In the end valves they go into 

 close radiating rows. Mucro in front of the middle, depressed, the 

 slope behind it very concave. Girdle with very few scattered hairs. 

 Interior: Anterior valve with 9, central 1, posterior 8 slits; teeth 

 sharp, normal ; eaves conspicuous, rugulose, but not spongy. Sinus 

 moderate, sharp, deep, channelled. 



Length 26, breadth 133 mill. 



C. ARMILLATA Carpenter, n. sp. Unfigured. 



Shell subelongate, elevated, the jugum acute; mucro a little in 

 front of the middle; reddish-brown, maculated with darker. 

 Valves quadrate, scarcely apicate; jugal area scarcely defined; 

 central areas having 14 to 20 lines of small granules on each side, 

 the interstices flat. Lateral areas scarcely elevated, having sub- 

 radiating, distant, sparse granules; entire surface nearly smooth, 

 very minutely punctulate and striatulate under a lens. Interior: 



