DEC APOD A. PORCELLANADjE. 



ANOMOURA. 



GENUS GALATHEA. Fakr. 



Cancer, Linn. Degeer. Herbst. 



Astacus, Pennant. 



Galathea, F;ibr. Latr. Leach, Edwards. 



Generic character. — Antennce inserted on the same transverse 

 line. External antemice longer than the body, the three basa 

 segments thick, the second not longer than it is broad ; the terminal 

 filament long and slender. Internal antennce inserted beneath the 

 eye-stalks, the peduncle elongate ; the last segment acute, multi- 

 articulate, ciliated beneath. External 2>edijMlps with the last two 

 articulations neither dilated nor foliaceous. Anterior feet equal, 

 or nearly so, thicker than the others, the claw well-formed; 

 second, third, and fourth pairs of feet simple, alike in form, with 

 acute nails ; fifth pair spurious, very slender, doubled above the 

 others within the branchial cavity, terminating in a rudimentary 

 hand. Carapace depressed, rather longer than broad, terminating 

 anteriorly in a sharp, more or less prominent, triangular rostrum, 

 which covers the base of the eye-stalks. Ei/es large and bent 

 dovrawards. Abdomen longer and nearly as broad as the thorax, 

 six-jointed ; all of the joints without spines on the anterior mar- 

 gin, and terminating in a broad fan-hke tail. 



The species of which this genus is composed, are few in 

 number, although it is probable that some have been con- 

 founded which are in reality distinct. The genus as it has 

 hitherto stood, according to Edwards and other late 

 writers, is composed of the genera Galathea and Mimida of 

 Leach ; I have, however, on what appears to me to be 

 sufficient grounds, restored Leach's genus Munida ; which 



