96 Dr. Maton’s and Mr. Racxett’s 
that system (according to which the generic distinctions are 
founded chiefly on the conformation of the hinge) the Pectines 
cannot be separated from the Osíree without manifest impro- 
priety. Even a difference in the animals will not warrant such a 
division; for the discriminative marks adopted by Linnzus are 
professedly external ; to which circumstance is ascribable, in our 
opinion, the great utility of his method.  Andif what may be 
called the accessorial part of his characters be in any case con- 
verted into a basis for generic diagnosis, the simplicity and con- 
sistency of the system are destroyed. 
E * Pectines, auriculati zequilateres. 
maxima. O.testa radiis rotundatis, longitudinaliter striatis. Linn. 
Fauna Suecica, n. 2148. Syst. Nat. p. 1144. m. 185. : 
Linn. Gmel. p. 8315. 
Bonann. Recr. 2. f. 8. 
Lister Anim. Angl. t. 5. f. 29. 
Peter. Man 86. 8,828.  — LV 
Crati Test:t98.4À B. l* 
Knorr Vergn. 2. t. 14. f. 1, i 
Bytem. App. t. 12. f. 50. 
Pennant Brit. Zool. 4. t. 59. f. 61. Pecten maximus. 
x Da Costa Brit. Conch. p. 140. t. 9. f. 3. 
Chemn. Conch. 7. t. 60. f. 583. 
Pulteney in Hutch. Dorset. p. 35. t. 9. f. 3. 
Donovan Brit. Shells, t. 49. 
Montagu Test. Brit. p. 143. 
Habitat in mari ; Incola edulis. v Um 
Testa diametro 5 poll. Operculum inter aures quasi gula GE Fornix 
radiis 14 rotundatis, striatis longitudinaliter una cum interstitiis. 
Auriculæ æquales, rectangulæ, striate. Color extus rufo- seu ferru- 
gineo-nebulosus, intus albus. (Linn. Mus. Lud. Ulr. p. 522.) 
First 
Conch. t. 163. f. 1. 
