DECAPODA. 165 



These Portuni constitute the genus, Lupa, Leach, and are mostly 

 of a large size and foreign to Europe. One species, however, i* 

 found in thf Mediterranean*. 



A third division will consist of species analogous to the last in the 

 form of their shell, l>ut whose lateral teeth, usually five in number, 

 are nearly equal, or where, at least, the posterior tooth differs but 

 slightly from the preceding ones ; the length of the claws does not 

 much exceed that of the shell. 



Those which have from six to nine teeth on each side are 

 exotic. The Portunu< ti-.m^ncbaricus, Fabr., Herbst., Cane., 

 XXXVIII, 3, is the only one known that has nine equal teeth 

 on each lateral edge ; it is large, and is much esteemed as food. 

 We suspect the P. leucodonte, Desmar., Hist. Nat. des Crust. 

 Foss., VI, 1 3, is the same species in a fossil state; it is also 

 from India. 



The following species, all from European seasf, have five teeth 

 MI each lateral edge of the shell. 



P. puber, Fab.; Cancer puber, L. ; Penn. Brit. Zool., IV, 

 iv, 8 ; Herbst., VII, 59 ; Leach, Malac. Brit.. VI. Covered with 

 a yellowish down ; eight small teeth between the eyes, the two 

 middle ones longest, obtuse and divergent; claws sulcated, 

 armed with a stout dentated tooth on the inner side of the 

 carpus, and from one joint to the following one or the hand ; 

 fingers blackish. 



This species is usually called in France, where its flesh is 

 considered a delicacy, rEtrille. 



P. corrugatus ; Cancer corrugatus, Penn. Brit. Zool., IV, 

 11. v, 9; Leach, Malac. Brit., VII, 1, 2. The shell rugose, 

 covered with a yellowish down, and furnished with three equal, 

 and almost lobuliform teeth in front ; the three posterior teeth 

 of the lateral margins very sharp and spiniform. 



P. mcenas ; Cancer mcenas, L., and Fab. This common 

 >l> rios of the French coast, called Crabe enrage, appears to me 

 to belong to the Portuni, rather than to the Crabs properly so 

 called ; its posterior fins are only somewhat narrower. Such 

 was the first opinion of Dr. Leach, who subsequently made a 



Portuma Dufurii t Latr., Nouv. Diet. d'Hist. Nat., Ed. II. This species 

 figured in the Diet. Class. d'Hist. Nut. closely approaches the Cancer haslutus, 

 I. in., which he says is found in the Adriatic. The following are to be referred to the 

 same division : Cancer pelagicwt, Herbst., Iviii, 55, C. forceps, Id., Iv, 4 ; Leach, 

 Zool., Miscell., liv ; C. sanguinolenlus, Herbst., VIII, 56, 57; C. cedonulli, Id., 

 xxxix ; C. relicvlatus, Ib., 1 ; C. hattattu, Ib. Iv, 1 ; C. menestho, Ib., 3 ; C- 

 ponlicus, I 



t For the Mediterranean species see Petagna, Risso and Olivi ; for those on the 

 western coast of France and the British seas, the Catalogue Methodiqw des Crustaces 

 du department du Calvados, by Brebisson, and especially the excellent work of 

 Dr. Leach, Malacostraca Podnphfh^lmia liritannitr. M. Desmarest has well developed 

 the -\ author in his Considerations Generates sur les Crustaces, an extremely 



useful book to th.i uho umke this brunch of Zoology their study. See also our 

 article Fortune, Encyc. Mcthotlujuc. 



