NO. 17 Lamarck's genera of shells — kennard et al. 13 



Genus Type & Synonym 



Chama C. lasariis (Idem. Linn.) §Stet. 



§Lk. Prod. 81 cites C. lazarus, Lin., and Lk. 

 Syst. 131 gives the same and another species. 

 Etheria 



[3] E. semilunata. §Stet. 

 § [Generic name emended to Etheria by Oken, 

 1818.] 

 Tridacna 



T. gigas (Chama gigas? Linn.) 

 §Generic name proposed by Bruguiere, 1797, on 

 plate with figures. Adopted by Lamarck 

 (Prod. 86) with diagnosis and genotype 

 Chania gigas, Lin. 



[Bolten, 1798, proposed Tridachnes for the 

 generic name.] 



31 57 Hippopus H. macxdatus {Chama Jiippopus. 



Linn.) 

 §Genotype, Lk. Prod. 86, is Chama hippopus, 

 Lin. Name arbitrarily changed in Lk. Syst. 

 117 to macidatus. 



32 58 Modiola M. papuaua 



§Invalid. Proposed as Modiolus, Lk. Prod. 87, 

 with genotype (p. 88) Mytilus modiolus, Lin. 



33 59 Mytilus M. magellanicus 



^magcllanicus was not a Linnean species and 

 cannot stand as type. Lk. Prod. 88 and Syst. 

 113 cite M. edidis, Lin., and this selected by 

 Gray, 1847, must be taken as type. 

 Pinna 



P. riidis (Idem. Linn.) . 

 §Same in Lk. Prod. 88 and Syst. 112. 

 Crenatida 



[2] C. viodiolaris 

 §Not a species included in the genus when 

 founded by Lamarck in 1803. Sowerby 

 (Genera, VIII, 1822) figured two of the 

 original species and of these Gray, 1847, se- 

 lected, as of Sowerby, C. mytiloides, which 

 should therefore be reckoned the type. 



