179 

 SVBORD. II. DIMYA Mkc. 



FAM. IV. AVICULACEA Mfee. (Margarltacca lilalnv.) 



66. CRENAl ULA Lam. 

 1. „Creiiatula Travisli (JT*.) Turton," 



Cr. tcsta rliombca, infcrne rotiiudala, pclliicida, albida, 

 viitis longiludinalibus inlerruptis pallide violaceisj marginc 

 antico incurvato. 



Long. fere 1 poll., lat. completc \ poll. 



Nominis auctoritalcm auctor sibi vindicat, quamquam 

 addlt, (W.) Bean nomen lioccc dedisse; interim pi'ae- 

 sumo, Bean iantum iu collecllonc sua id adscripslssc: atta- 

 mcu omuiuo auctoris crat, de lioc rationem rcddcre! 



E cclleclione W. Lcan. — Ilab. ad Scarborough in 

 Brilauuia. 



Loudon, magazinc of nat. Iiist. art. VIII. p. 350. et 

 icon ligu. adpos. 



FAM. V. ARCACEA Mke. (Polyodonta Blalnv. 



^y. APvCA Linn. (cjpboxis Rafiu.; arca et Irisis Oken.) 



1. Arca luberculosa G. B. Sowerhy. 



Arc. testa ovali, iurgida, obliqua, subaurita, radiaiim 

 costata, coslis uumerosis, sparsim tubcrculifcris, antice prac- 

 sertim; umbonibus proximis; area ligamcullfera angusia^ 

 lalere antico breviore, 



Long. 2-8 poll., lal. 2-1 poll., alt. 2-2 ])oll. 



Testa exceptis umbonibus iccta est cpidermide crassa, 

 obscurc brunnea. — Testa aequivalvis. 



Legit H. Cuniing ad Keal Llejos. 



Proccedings. 1833. p. 19. 



2. Arca nux G. B. Sowerhi/. 



Arc. icsta obliqua, im-gida, inaequivalvi, radiatim co- 

 siata; valrac dcxtralls costis anticis granifcris, sinistralis 

 costis omnibus graniferis; umbonibus disiantibus, promiuen- 

 iibus; epidermide fusca, cornea, ienui, ad posticam costa- 

 rum partem sctigera. 



12* 



