NO. ly Lamarck's genera of shells — kennard et al. ii 



Genus Type & Synonym 



Isocardia I. cor (Chama cor. Linn.) 



§Genotype (Lk. Prod. 86) is Chama cor, Lin. 

 Lk. Syst. 118 cited two species one being 

 globosa, n.n. for cor. 

 318 45 Cncullaea C. auriculifcra {Area cucidlus. 



Gmel.) 

 §Genus founded by Lamarck (Syst. 116) for 

 C. auricidifera and C. anatina; the former 

 being- n.n. for Area cucullata, Chemn. (non 

 h'mom.) =cucullus, Gmel. (3311). The type 

 by tautonomy is C. cucidlus (Gmel.). 



318 45 Area 



319 46 A. tortuosa (Idem. Linn.) §Stet. 



§Lk. Prod. 87 and Syst. 116 cite A. noce, Lin., 

 and this was accepted by Gray, 1847. 



319 46 Pcctunculus 



320 47 P. glycimcris {Area glycimeris ? 



Linn.) 

 §Genotype, Lk. Prod. 87, is Area pcctunculus, 

 Lin. Lk. Syst. 115 cites P. subauritus, which 

 in Hist, is sunk in P. pectiniformis, n.n. for 

 pectunculus. 



[Genus preoccupied by DaCosta, 1778, for 

 some Veneridae, and preceded by Glycymeris 

 of the same author, type Area glycymeris, 

 Lin.] 



320 47 Nucula [2] N. rostrata {Area rostrata. 



Brug.) 

 §Genotype, Lk. Prod. 87, is Area nucleus, Lin., 

 renamed in Syst. 115 A^. margaritacea, n. 



321 48 Trigoma T. peetinata. §Invalid. 



§The recent form, not having been discovered 

 when Bruguiere, 1789, named and figured the 

 genus from fossil examples, cannot stand 

 as type. Lk. Prod. 86 defined the genus, but 

 gave no type. Lk, Syst. 117 cites T. nodulosa, 

 n., and this accepted by Gray, 1847, niust 

 be taken for the type. 



321 48 Cast alia 



322 49 C. ambigua. §Genotype. 



