144 CO'^CRYLIA—DITHYRA. 36. 



cancellata. Venus testd orbiculo-cordatd, anlice (lugulatd, lamellis transversis re- 

 motis crebro cancellatis, areola cordatd. 

 Shell round heart-shaped, angular on the anterior side, with remote 

 transverse plates which are closely cancellated, and the areola 

 heart-shaped. 



Tab. nost. 10, fig. 3 

 Venus cancellata. Linn. Syst. Nat. \). 1130. 

 Gmelin, Syst. p. 3270. 

 Turton, Linn. JSyst. iv. p. 220. 

 Chemnitz, vi. p. 309, tab. 29, fig. 304 and 305. 

 Mus. nost. From the shores of Guernsea. 



Shell about half an inch long, white with sometimes a slight rosy 

 tinge, with nine or ten rather remote membranaceous ridges, the 

 stronger of which have a raised transverse line between them, and 

 are slightly tubercled on the anterior side ; the interstices marked 

 Avith close-sot rib-like longitudinal stvise : the anterior side abruptly 

 cut oiF from the beaks, forming an angle about the middle : beaks 

 near one end, prominent and recurved. 



This species, which is not uncommon in the seas about Guernsea, 

 answers exactly to the figures of Chemnitz, and is easily distin- 

 guishable from the young of Venus verrucosa ; for the laminar 

 plates are much more remote, and the marks between them are regu- 

 lar and rib-like, not crossing the plates. 



subcordata. Venus testd orbiculato-cordatd, costulis remotivscuUs, longitudinali- 

 busque lamellas transversas remotiores decussantibus. 



