i! Norn I ! . 



( larpenter'e aotei are as toll.,- 



CiiiniiiL'-. A very remarkable ipecies, \\iili M 

 combination of characters. IVrhap- it belong- rather win 



etO, Valves rather pointed in limit, and broader behind ; 

 oval, -omewhat elevated, jiiguni rat her .-ha rp. (in-ni, uitli one OF 

 more valves always varie-ated with darker; line N's.-dlati..; 

 suture-, causing it to appear toothed. Muero rather rai- 

 anterior third ; posterior >h>pe very concave. Valves rath' ; 

 with conspicuous, rat her obtuse apices. Side areas scared v di-tinct. 

 'The whole surface is rat her glossy, hut under the niirrosropr uitli 

 extremely line .irranulation, which runs into line lines alon- ami 

 near the juiruni. ( Jirdle Trachydermoid, covered with extremely 

 minute scales and occasional hairlets, but at the sutures and in a 

 row around the margin are a series of brown dots which turn out 

 to be semi-pores, quite regular but without hairs, only lar.L ri 

 making a kind of knob. They are very conspicuous as pore-lumps 

 when the shell has been soaked. The anterior valve has 11, central 

 1, posterior 9 slits. Teeth stumpy, like nuttallii, but not striated. 

 Sinus shallow and rounded, with about 16 teeth, formed by the 

 lirations of the anterior part within. Eaves short and very spongy. 

 Length 12-1, breadth 7 mill.; divergence 113. 



I. STRAMINEUS Sowerby. PI. 8, fig. 71. 



Shell ovate, smooth, pale straw-colored ; back rounded ; marginal 

 scales sparse. (Sowb.~) Length 10, breadth 6 mill. 



Island of Chiloe, under stones at low w 



Chiton stramineus Sows., P. Z. S. 1832, p. 104 ; Conchol. Illustr. 

 f. 28; Zool. Beechey's Voyage, p. 150, t. 41, f. 13. Trachydermon 

 straminens Sowb., CARPENTER, MS. p. 21. 



Carpenter remarks : A distinct species. Five specimens in Mus. 

 (aiming, much worn and smashed. They scarcely show the sculpt- 

 ure ; in the best there is an attempt at granulation. Rather broad, 

 flat, rounded jugum. Girdle gravelly; mucro median, a tritle 

 raised ; posterior slope nearly straight. The anterior valve h:i- 

 median 1, posterior 10 slits; teeth sharp, Isehnoid ; eaves mod, 

 Length 1H, breadth 7 mill.; divergence about 114, the valve- 

 rounded. 



