66 



II. Mantle ivith a series of pores {each furnished with a tuft of spines) 

 on each side. The platės of insertion of all the valves with only a 

 single notch on each side, ivhich is sometimes rudimentary . 



12. Cryptoconchus. Exposed part of valves very small, linear, 

 much longer than broad ; mantle smooth. * 



13. Amicula. Exposed part of valves small, subcordate, as broail 

 as long ; mantle bristly. 



14. AcANTHOCHiTES. Exposed part of valves moderate, broad 

 cordate, as long as broad ; mantle spinulose. 



15. Chitonellus. Exposed part of valves linear-lanceolate, elu. 

 gate ; body vermiform ; mantle spinulose. 



1. Chiton, Linn. (part), Guilding, Z. J. v. 27 ; Sivainson ; Gray, Syn. 



Lepidopleurus, " Leack MSS.," Risso, Eur. Merid. 267. Chiton, 

 sect. A. 1. Blainv. Lepas spec, Adanson. Corephium, Brotvn. Lo- 

 phurus, Poli. Gymnoplax, Gray. 



* Scales of the margiu moderate, smooth, polished; valves thickish. 



Ch. striatus, Barnes. Ch. olivaceus, Frembly, Sow. C. III. f. 3, 41. 

 Chiloe. 



Ch. Cumingii, Frembly, Sow. C. III. f. 32, 51. Chili. 



Ch. albolineatus, Sow. C. III. f. 39. Mexico. 



Ch. sąuamosus, Linn. Ch. bistriatus, IVood. Ch. obscurus, Sow. 

 West Indies. 



Ch. sulcatus, Wood, Sow. C. III. f. 12. 



Ch. grąnosus, Frembly. Chili. 



Ch. Barnesii, Gray. Coąuimbo. 



Ch. glaucus, Gray, Spic. Zool. ^Ch. viridis, Quoy. 



Ch. granulosus, Frembly. Conception. 



Ch. Siculus, Gray. Ch. Polii, Desh. Sicily. 



Ch. lyratus, Sow. C. III. f. 126. 



Ch. foveolatus, Sow. C. III. f. 60. 



Ch. excavatus, Gray, Sow. C. III. f. 131. 



Ch. fasciatus, Wood, Sow. C. III. f. 153. 



Ch. australis, Soįv. C. III. f. 46. 



Ch. Stokesii, Brod., Sow. C. III. f. 24. 



Ch. virgulatus, Sotu. C. III. f. 132. 



Ch. patulus, Sow. C. III. f. 134. 



Ch. marmoratus, Gmelin, Sow. C. III. f. 148. West Indies. 



Ch. evanidus, Sow. C. III. f. 139. 



Ch. articulatus, Sow. C. III. i. 18. Califomia. 



Ch. laevigatus, Sotv. C. III. f. 18*. Califomia. 



Ch. Goodallii, Sow. C. III. f. 50. Galapagos. 



** Scales of the mantle small, smooth, polished. 

 Ch. Bowenii, King, Sow. C. III. f. 37. Magellan Str. 



