LEPAS. 61 



vinegar. Rondel etius says that they are particularly 

 grateful to women, and delicate persons whose excesses 

 have injured their appetite. Midieres et delicatiores 

 homines alia fastidientes cibaria hoc eduli genere delec- 

 tantur, et qui veneri dediti sunt.s 



It is this species which the French call pouce-pied 

 from the resemblance it bears to the toe nail. 



PEN-KNIFE BARNACLE. 

 PL 10. /. 3. Mr. Sowerby. 



34. Lepas Scalpellum. L. testa compressa tredecimvalvi Iceviuscula, 



pedunculo sauawoso insidente. Linn. Syst. Nat. ed. 12. p. 1109. 



Linn. Gmel. p. 3210. 

 Shell compressed, of thirteen valves, smoothish and seated on a scaly 



peduncle. 

 Anatifa Scalpellum. Brug. Encycl. Meth. Hist. Nat. tom.6. p. 64. 

 Ellis, Phil. Trans, vol. 50. t. 34. f. 2. item 2. a. Gualt. Test. pi. 106. 



f. C. D'Argenville, Conch, t. 26. f. G. Favanne Conch, t. 59. C. 6. 



Mailer, Vollst. Natur. Syst. t. 6. pi. 10. f. 7. Chemn. Conch. 8. 



p. 338. vignette 17. at p. 294. f. a. A. Encyclop. Method, pi. 166. 



f. 7, 8. Donov. Brit. Shells, pi. 1 66. Pultn. in Hutch. Dorset, t. 2. 



f. 8. Mont. Test. Brit. p. 18. pi. 1. f. 3. Linn. Trans. 8. p. 27. 



Penn. Brit. Zool. ed. 1812. pi. 4. p. J 51. 



This species is composed of thirteen unequal and 

 irregular valves, six of which are placed on each side, 

 and the thirteenth forms the back. The three loAver 

 valves are, smaller than the rest, and the posterior one 

 projects a little at bottom into a knob, or beak. The 

 dorsal valve curves towards the upper part of the shell, 

 and terminates in a point. This curvature gives it the 

 pen-knife figure, and probably suggested to Linnaeus 

 the trivial name. The valves are connected together by 

 a transparent red membrane, which lines their internal 

 surface, and appears to be a prolongation of the pedi- 



