CIRRIPEDES. MOLLUSCA. OTION. 23 



OPTION CUVIE'RI. 



Body hood-shaped, surmounted by two ear-shaped processes or 

 tubes inclined backwards ; a small, crescent-shaped valve on each 

 side of the aperture ; color livid-brown. 



State Coll., No. 258. Soc. Cab., No. 2088. 



Lepas aurita, LIN. j Syst. Nat , p. 1110. ELLIS ; Philos. Trans., 1758, t. 34, f. 1. 



BRUG. ; Diet , p. 66. MARTINI ; Conch,, viii. 345, t. 100, f. 857, 858. WOOD j 



Gen. Conch, 70, t. 12, f. 4. -Index, pi. 2, f. 45. 

 Lepas leporina, POLI ; Test., t. 6, f. 51. 

 Malacotta bivalvis, SCHUMACHER; 38. 

 Option Cuvieri, LEACH ; Cirrip., Encyc. Brit., Suppl., 170, pi. 57, f. 3. LAM. ; 



An. sans Vert., v. 685. SOWERBY ; Genera, pi. 1-4. GRAY ; Annals of Philos., 



v. 10, 100. 

 Gymnolepas Cuvieri, BLAINVILLE ; MalacoL, pi. 84, f. 1. 



The tunic or covering of this animal is a smooth, leathery mem- 

 brane, of a livid or leaden-brown hue, appearing glossy when 

 fresh. The pedicle is rather long, and its limit of union with the 

 body is marked by a well-defined constriction. The body is hood- 

 shaped or helmet-shaped, surmounted by two hollow appendages, 

 somewhat resembling the ears of animals, open at their extremities, 

 inclining backwards. The aperture is large and gaping. It is 

 fortified by a small, crescent-shaped valve on each side at its base. 

 Vestiges of rudimentary valves are also to be seen at the summit. 

 Cirri of the same color as the tunic. Length from 2 to 4 

 inches, of which the pedicle constitutes nearly two thirds. 



Found on vessels' bottoms and in other situations, in company 

 with C IN ERAS vittata. 



