Dr. Leacu’s Arrangement of the Crustacea, $c. 321 
Amenitates Academice will readily convince the naturalist of the 
incorrectness of this opinion: noris this the floridus of Herbst ; 
which induces me to believe that some one must have misled 
Mr. Montagu with regard to the synonym, as he could never have 
considered them the same had he examined the reference. 
Cancer Dodone of Herbst seems to be referable to the genus 
Xantho; and, if his figure be correct, the only distinction is in. 
the number of teeth on the sides of the shell, which in C. Dodone 
is only three. 
Gen. 12. CALAPPA, Latr., dc 
Pedum par anticum cristatum, equale. | 
DIVISIO IM. 
Abdomen in utroque sexu 7-articulatum. Pedum par anticum 
didactylum; paria reliqua consimilia. _ 
SUBDIVISIO 1. 
Testa antice arcuata, lateribus in angulum convergentibus. (Pedum 
par anticum incquale). 
Gen. 13. PILUMNUS. 
Cancer, Pennant. 
Pedipalpi gemini externi caulis interni articulo secundo minore 
. ad apicem internum truncato-emarginato. Ungues simplices, 
apice nudi. : 
: | Spec. 1. Pilumnus hirtellus. 
Cancer hirtellus, Penn. Brit. Zool. iv. tab. 6 
Gen. 14. 
