20 Dr. Maton’s and Mr. RACKETTS . 
species by the side of each other, in order that their relative 
characters might be more accurately impressed on the mind 
than it came within the compass of language, simply, to ac- 
complish. 
CHITON. 
Linn. Syst. Nat. n. 300. 
k 
crinitus. Ch. testa septemvalvi, pilis brevibus dense obsita. 
~ Linn. Gm. p. 3206. 
Pennant Brit. Zool. 4. t. 36. f. 1. 
Montagu Test. Brit. p. 4. 
Habitat in mari. 
Testa % poll. longa. (Pennant.) 
An vere distincta à Ch. cinereo ? 
We give this species on the authority of Pennant, 
» who mentions having found it near Aberdeen; and Mr. 
Boys is said to have found it at k Sandwich; but it 
has never fal er under. € — ‘notice. - = 
discors. Ch. testa septemvalvi eee ian lato leviter reti- 
culato. Montagu Test. ie ps. 
Habitat in mari. 
Testa oblonga 4 poll longa, valvulis extremis rufescente- brna: t 
valvule 5 mediz transversim divise, postice sagrinatz, antice leves. 
~ vel leviter transversim striate. (Montagu.) 
— —. A new and rare species discovered in Salcombe Bay, 
oe Devon, by Mr. Montagu, by whom it is described 
= he t lame. vis, which appeared 
= na e, a as conveys a an idea that no other 
E species of. this genus has that number of valves. 
-4 fasci- 
