96 ilN"< I II TON. 



Carpi-mer gives the following aotee: Anterior valve with !'. 



:al valv.s 1 , posterior valve 9 slits; teeth typically Ischnoid ; 



.-inns deep, broad, channelled, flat ; eaves moderate. Jugum obtuse, 



elevated; central areas very conspicuously granulated in quincunx. 



ing somewhat into the Y-culpttiiv : lateral areas cnspicinMi>ly 



raised, concentrically wrinkled, " thuinhy." Mucro central. <iir- 



dle with pretty large, broad, thin, distinctly striated regularly 



imbricated scales. Length 22, breadth 10} mill, ; divergence 106. 



The peculiarity of the shell is the elongation. It is probably 

 Australian and belongs to the /. contractus group. 



I. 1-1 ii \n- Reeve. PI. 24, figs. 11, 12 (enlarged). 



Shell elongately ovate; terminal valves and lateral areas radi- 

 ately ridged; ridges wrinkled, here and there grained and bifur- 

 1 : central areas very minutely reticulated. Burnt brown. 

 Ligament granosely coriaceous. (Reeve.) 



('. Httulatus REEVE, Conch. Icon. t. 17, f. 102, March, 1847. 

 !.},, lor/titon ustulatus CPR., MS. Lepidopleurus untHftitn* A N< ; AS, P. 

 /. - 1*<>7, p. 222. 



Carpenter briefly notes that the scales of the type specimens an 

 rather gravelly and irregular, very small, but apparently a little 

 >triated. The drawings of scales and valves given on my plate 

 were prepared for Carpenter, presumably from specimens in th- 

 collection of Mi-. Win. A. Ilaines, of New York City. 



I. < -A KI NT i. ATUS Reeve. PI. 23, figs. 94, 95. 



The finely keeled Chiton. Shell oblong-ovate, terminal valves 

 and lateral areas of the rest concentrically and radiately somewhat 

 obscurely ridged and sculptured with obtuse granules arranged in 

 wrinkles, central areas also granulated, smooth in the middle, 

 peculiarly keeled at the summit; ruddy rose; ligament finely 

 squamately coriaceous. (Rve.) 



T.<i 



C/i. r.i,'hu</tifn* RKKVK, Conch. Icon, t, 23, f. 158, May, 1847. 

 Tschnochiton cnriiinlntun OK., MS. 



Carpenter's notes on the single type specimen in the IJritish 

 MiiHMim are as follows: Along, narrow, rather ;,o///V-///vm/ >hell, 

 the shape of longicymba. Girdle with very small, distincilv but 

 ti n. ly striated scales. Mucro at the anterior fourth. .Ingmn rather 



