rxio. 



59 



fWlDE. 



Mya pictorum. Lin. Mill. Born. 



Poli. Sehrot. Pennant. Dill. 



Wood. Mat. Schreib. Da Cost. 



Alten. 

 Musculns angustior. List. Hist. Ani- 



malia, p. 149. 

 Mya corrugata Maroccana} Chem. 



margaritica. Klein. 



augusta. Klein. 



Long thick horse mussel. Petiv. 

 Mya nodosa. Martini. Lin. Schreib. 



Wood. Dill. 

 My sea pictorum. Turt. 

 Potomida sicula. Swain} 

 Unio delphinus. Speng. 

 Unio inflatus. Stud. 

 Unio rostratus. Lam. Pfeif. Mich. 



Desh. Bou.il. Gfras. Puton. 



Potier. Brown. Villa. Waard. 



Chenu. Fitz. Gras. 

 Unio manca. Lam. Millet. Dup. 



Bourg. 

 Unio castaneus. Mill. 

 Unio elongatulus. Muhl. Rossm. 



Potier. Por. Dup. Villa. 

 Unio Turtonii. Payr. Desh. Phili. 



Dup. Bourg. 

 Unio lobatata. De Or. and J? 

 Unio Capigliolo. Payr. Desh. More. 



Dup. Rossm. Grat. Moa. 

 Unio Requienii. Mich. Rossm. Gas- 



sies. Potier. Dup. Gras. Grat. 



Mous. Bourg. Stab. Moq. 

 Unio Deshayesii. Mich. Desh. 



Rossm. Broun. Gras. Grat. 

 Unio platyrinchoideus. Dup. Bourg. 



wide. 



Unio Umosus. Nil. Rossm. 



Unio longirostris. Zeigl. Potier. 

 Por. Ro?sm. Villa. Schmidt. 



Un 

 Un 

 Un 

 Un 

 Un 

 Un 



Un 



Un 



Un 



Un 



Un 



U 



l ' 



Un 



Un 



Un 



Un 



Un 



Un 



Un 



Un 

 Un 

 Un 

 Un 

 Un 

 Un 

 Un 

 Un 



o lemovicense. Fer. 

 o retusus. H 



•osus. J\ 



■itus. 

 b latir 



innus. 

 o corrosus. 

 o Spinelli. 

 o pollens. 

 o dactylus. 

 o mucidus. 

 'o arcuatus. 



Me nice. 



Kilr : 

 K lister. 

 Kilster. 

 Villa. Por. 

 Villa. 

 Parreyss. Kilst. 

 M:' relet. 

 Morelet. 

 Bouch. Dup. 

 o Ardusianus. Reynies. 

 o Muelleri.* Rossm. 



o pond 



o gran 

 'o decipiens. 

 o Nath i 

 o vind 

 Pt troviehii 



Spit: 

 Zieg. 



/. '. MSS 

 Kiist. 



Kiist. 



Kilst. 



Rossm. 



Bourg. 



o dub i us. Fitz. 

 o Ronsii. Dup. 

 o proechus. Bo u rg. 

 o actaphilus. Bourg. 



aris. Stab, 

 o Blauneri. Shutt. Stab, 

 o subreneformis. Bourg. 

 b Penchinatianus. B 

 o Graellsianus. Bourg. 



Unio Courquinianus. Bourg. 



*elongatulus. Pfeif. Han. 

 Unio Aradse. Phili. 



1 Chemnitz figures this shell, vol. vi. table 3, Figs. 23 and 24. From the description and outline. I 

 have little doubt of its being a young pictorum. more than usually undulated in the region of the beaks. 

 Its being rugose over the whole surface, as mentioned by him, is not evidence against its being such. 

 As the first growth subsequently forms the beak of the shell, it ought of course to be rugose, if that be 

 the character of the shell. The inside view is without teeth, but this is doubtless the fault of the drafts- 

 man or engraver, as the author speaks of the hinge being like the common mussel. 



5 1 suspect this will prove to be the same as elongatulus, Pfeif., which may itself be only a var. of 

 pictorum. Swainson and Pfeiffer obtained them from Sicily. 



3 Fide Philippi. Michaux's figure has more the appearance of U. Batavus. 



' I think this will be found to be a deformed pictorum. 



