PHOLAS. 85 



HEART-SHAPED PIERCER. 



9. Pholas cordata. Ph. testa brevi, turgida, posterius st7'iis details 

 transversis subtilibus exarata; hiatu cordato. Linn. Gmel.p. 3216. 



Shell short and turgid, finely marked behind with elevated transverse 

 striae ; aperture heart-shaped. 



Schr'dt. Einl. in Conch. 3. p. 544. n. 4. t. 9. f. 22 — 24. Encyclop. 

 Method, pi. 169. f. 8, 9, 10. 



This species is described by Schroter as very thin 

 and brittle ; of a dirty white colour, and smooth on the 

 fore part, except a few ridges. The tooth is minute, 

 and concealed in the shell. It is about half an inch 

 long, and burrows in corallines. 



CHILI PIERCER. 



10. Pholas Chiloensis. Ph. testa oblonga, depressiuscula ; striis longi- 



tudinalibus distantibus. Linn. Gmel. p. 3217. 

 Shell oblong, rather depressed, with distant longitudinal striae. 

 Molini Hist. Nat. Chil. p. 179. 



Described only by Molini. It is five inches long, and 

 has minute appendages. Inhabits the rocks on the 

 coast of Chili. 



GAPING PIERCER. 



11. Pholas hians. Ph. testa bivalvi, alba, transverse arcuatim striata, 



supra connivente, medio convexa, subtus cuneiformi ; apertura ovali 



patentissima. Linn. Gmel. p. 3217. 

 Shell of two valves, white, with transverse arched striae ; above conni- 



vent, in the middle convex, beneath wedge-shaped ; aperture oval and 



very large. 

 Chemn. Conch. 10. p. 364. pi. 172. f. 1678—1681. Spengl. Nov. Act. 



Soc. Dan. 2. f. 8—11. 



This species is about an inch and a half long ; it has 



