DECAPOUA. 
165 
These Portuni constitute the genus, Lupa, Leach, and are mostly 
of a large size and foreign to Europe. One species, however, is 
found in the Mediterranean *. 
A third division will consist of species analogous to the last in the 
form of their shell, but 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 Portunus tranquebaricus, 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, I — 3, is the same species in a fossil state; it is also 
from India. 
The following species, all from European seasf, have five teeth 
on each lateral edge of the shell. 
P. puber. Fab.; Cancer puber, L. ; Penn. Brit. Zook, 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. Zook, IV, 
pk V, 9; Leach, Malac. Brit., VII, I, 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. moenas ; Cancer moenas, L., and Fab. This common 
species 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 
* Portunus Dufourii, Latr., Nouv. Diet. d’Hist. Nat., Ed. II. This species 
figured in the Diet. Class. d’Hist. Nat. closely approaches the Cancer hastatus, 
Lin., which he says is found in the Adriatic. The following are to be referred to the 
same division : Cancer pelagicus, Herbst., Iviii, 55, — C. forceps, Id., Iv, 4 ; Leach, 
Zool., Miscell., liv ; — C. sanguinolentus, Herbst., VIII, 56, 57; — C. cedonulli, U., 
xxxix ; C. reticulatus, Ib., 1; — C. hastatus, Ib.lv, i; — C. menestho, Ib., 3; — C- 
ponticus, Ib. .5. 
•f- For the Mediterranean species see Petagna, Risso and Olivi ; for those on the 
western coast of France and the British seas, the Catalogue Methodique des Crustaces 
du departement du Calvados, by Brebisson, and especially the excellent work of 
Dr. Leach, Malacostraca Podophthalmia Britannice. M. Desniarest has well developed 
the system of this author in his Considerations Generates sur les Crustaces, an extremely 
useful book to those who make this branch of Zoology their study. See also our 
article Portune, Encyc. Methodicjne. 
