84 COLLECTIONS FKOM MELANESIA. 



The single specimen from the latter locality is rather more coarsely 

 granulated than those from Flinders Island, which have been exa- 

 mined by the late Dr. P. P. Carpenter, and bear his manuscript 

 name asbestoides. 



117. Chiton (Tonicia) fortiliratus. 



Chiton fortiliratus, Seeve, Conch. Icon. fig. 112. 



Hab. Port Darwin, 8-10 fms., sand and mud ( Goppinger) ; 

 Eaines Island, Torres Straits (Beeve). 



The single specimen collected by Dr. Coppinger is of ^a greyish- 

 pink colour, copiously blotched with black along the sides of some 

 of the valves. The head-plate is regularly well-curved forward, 

 rather high, the posterior margin being obtusely angled in the 

 middle. The inserted edge is much thickened, coarsely striated 

 exteriorly and on the broad margin, and divided into nine unequal 

 parts by eight short narrow sUts. The exterior surface is coarsely 

 subsquamately granulated throughout, and exhibits numerous minute 

 black raised dots, disposed in rather irregular radiating series. The 

 second valve is long in comparison with those which foUow, feebly 

 peaked behind ; the fourth, fifth, and sixth plates are about equal in 

 width and a trifle broader than the third and seventh. All the inter- 

 mediate valves are very coarsely ridged and suloated on the central 

 areas, and coarsely grained and minutely black-dotted at the sides. 

 The ridges are flat-topped, clean-out, nearly smooth, attenuated 

 posteriorly, wavy, converge on each side towards the front, and the 

 intervening grooves are flnely punctate. All have the hinder margin 

 nearly straight, and but very feebly pointed at the posterior apex. 

 The laminae of insertion of these valves are thin, narrow at the 

 sides, moderately deeply sinuated in front, strongly striated above 

 in rear of and for a short distance in front of the single minute 

 lateral slit on each side. The posterior valve is strong and thick, 

 obtusely mucronated at the centre, very coarsely striated and ser- 

 rated upon the thickened inserted margin, which is subdivided by 

 about ten distinct notches. The interior of the valves is light livid 

 bluish, with a reddish stain along the middle of all, with the excep- 

 tion of the last. The mantle, as described by Eeeve, is simply 

 "horny." Length without girdle 18 millim., diameter of fifth 

 valvo 9. 



The type is a larger specimen, being 24 millim. long, with an ex- 

 treme width of 13. 



118. Chiton (Chitonellus) striatns. 



Chitonellus striatus, Lamarck, An. s. Vert. ed. 2, vol.- vii. p. 481 ; 



Sowerby, Gen. fig. 4 ; id. Conch. III. Us. 62 ; Seeve, Conch. Icon. 



fig. 4; Conch. Syet. pi. 136. fig. 1. 

 Chitonellus oculatus, Meeve (? of Quoy), I. c. figs. 7 a, h. 

 Var.= Chitonellus gunnii, Meeve, fig. 5. 

 Chitonellus rostratus, Beeve, fig. 6. 



