422 CRUSTACEA. 



Length, 6 lines; breadth, 6'1 lines, being greatest a little anterior 

 to the middle. 



P. punctata, GUERIN, Bull, de la Soc. des Sci. Nat. de France. 

 P. cristata, EDWARDS, Crust., ii. 254. 



PORCELLANA TUBERCULATA, 



Valparaiso, Chili ; San Lorenzo, Peru. 



Length of carapax, 54 lines ; breadth, 5*7 lines. Colour, brownish 

 red with a tinge of purple; the prominent surfaces of the carapax 

 blue with a purplish tinge ; purplish below. The surface of the cara- 

 pax is short downy, like the tuberculifrons, excepting the low promi- 

 nences. The front has three nearly equal and similar points, each 

 with a small tubercle above. The carpus has five or six denticulate 

 teeth, rather broad and partly rounded; and there is a row of small 

 tubercles or granules some distance from the posterior margin. 



Porcellana tuberculata, GUERIN, Bull, de la Soc. des Sci. Nat. de France, Stance du 

 23 Dec., 1835, p. 115, and Mag. de Zool., 1838, p. 6, pi. 26, f. 2. 

 P. lobifrons, EDWARDS, Crust., ii. 256. 



PORCELLANA TUBERCULIFRONS, Edwards and Lucas. 

 Valparaiso. 



Length of carapax, fourteen lines ; breadth, fifteen lines. The sur- 

 face of the carapax is more even than in the tuberculata of Guerin 

 (lobifrons, Edwards) ; the middle lobe of the front has two small 

 tubercles above instead of one, and the outer lobes are subquadrate ; the 

 carpus has but two or three large teeth, and quite near its posterior 

 margin there is a range of small tubercles. The carapax and legs 

 have the surface short villous. 



P. ajfinis, GUERIN, Bull, de la Soc. des Sci. Nat. de France, S&nee du 23 Dec., 

 1835, p. 116, and Mag. de Zool., 1838, p. 6. 



P. tuberculifrons, EDWARDS and LUCAS, D'Orb. Crust. S. A., 33. The name ajfinis 

 was previously applied to another Porcellana by Gray. 



