CONCHIFERA. 747 



Animal (Peroncea POLI) with both tracheae extremely long, sub- 

 equal, and with margin of mantle as though serrate with acuminate, 

 conical cirri. 



Capsa BRUG., DESH. (not LAM.) Shell convex. Hinge narrow, 

 with two unequal teeth in each valve. Ligament thick, elongate. 

 Lunula indistinct. 



Sp. Psammolia rugosa SOWERBY, REEVE, Sanguinolaria rugosalj AM., Venus 

 deflorata L., CHEMNITZ Conchyl. Tab. 9, figs. 79 83, DESHAYES Conchyl. 

 PI. 13, figs, i 3 ; this species of shell is met with in the Atlantic, the Eed 

 Sea and the Indian Ocean, and is amongst the most generally dispersed 

 species. The animal is still unknown. 



Sanguinolaria LAM., DESH. Shell flat. Hinge with two unequal 

 teeth. Ligament elongate, flat. 



Sp. Psammolia sanguinolenta nob., Solen sanguinolentus GM., Sanguinolaria 

 rosca LAM., CHEMN. Conchyl. Tab. 7, fig. 56. 



Psammobia LAM., DESH. Shell flat. Hinge with two teeth 

 small, diverging or with single tooth. Ligament elongate, gibbous, 

 protuberant. 



Sp. Psammdbia vespertina LAM., Solen vespertinus GM., BLAINV. Malacol. 

 PI. 77, fig. 4 ; Psammobia incarnata DESH. (Tellina incarnata L., Fauna 

 Suec.), Psammob. feroensis LAM. &c. These two species occur also fossil in 

 tertiary formations. 



Tellina L. (exclusive of some species). Shell thin, mostly 

 transverse, inequilateral, anteriorly shorter, rotundate, posteriorly 

 plicate, with fold running obliquely from the margin towards the 

 points. Hinge narrow, with two teeth or single tooth in each 

 valve ; in most two lateral teeth remote. Animal (Peroncea POLI) 

 with foot large, lanceolate and margin of mantle cirrate with long 

 unequal tracheae, hiding deep under the sand. 



The species of this genus are numerous, especially in other parts of the 

 world. In most the shell is long and flat, as Tellina radiata L., D'ARGEN- 

 VILLE Conchyl. PI. 22, fig. A, Encycl. meth., Vers. PI. 289, fig. 2, BLAINV. 

 Malacol. PL 71, fig. 4; sometimes ending behind with a thin elongated 

 part, as in Tellina rostrata L., Tellina Spengleri GM., LAM. Encycl., 

 Vers. PI. 287, fig. 5. In others the shell is more round, as Tellina lingua 

 felis L., RUMPH. 1. 1. fig. G, GUERIN Iconogr., Moll. PI. 31, fig. i. In the 

 North Sea is found Tellina fabula GMEL., LAM., GBONOV. Zoophylac. Tab. 

 1 8, fig. 9, Tellina solidula SOLAND., LAM. &c. 



Comp. on this genus SPENGLEK STcrivter af naturh. Selskalet, iv. 2. 

 Kjb'benhavn, 1798, pp. 67 121, Tab. 12. 



