CANCROIDEA. 243 



margin has a slight indentation at centre, and another near the orbits. 

 Along a transverse line just anterior to a line between the lateral 

 teeth, there is an abrupt depression in the carapax. Quite near the 

 front margin there are two small tufts of short hairs, and also other 

 two on the angle of the abrupt depression in the surface of the cara- 

 pax just alluded to. 



The basal joint of the outer antennae is much the largest, and sub- 

 cylindrical. The apex of the base projects beyond the front margin 

 of the carapax ; the flagellum is as long as the front margin. 



Melia tessellata, M. Edwards, Crustaces, i. 431, pi. 18, figs. 8, 9, and Cuv., pi. 15, f. 3. 



Subfamily II. ACTUMNEOE. 

 Genus ACTUMNUS. 



Carapax angustus valde convexus, fronte et lateribus curvatim declivis. 

 Area prcelabialis lined elevatd bene subdivisa. Articulus antennarum 

 externarum lrnus processum frontis oblongum attingens tantum. Digiti 

 breves. 



Carapax narrow, very convex, anteriorly and laterally curving down- 

 ward. Praelabial area subdivided quite across by an elevated line. 

 First joint of outer antennas reaching barely an oblong process of 

 the front. Fingers short and excavate spoon-like, as in Aetata. 



The species have the aspect of a narrow, nearly globose Actjea, 

 and one of them is granulous, like several of that genus. They also 

 resemble the Pilumni, from which they differ in the excavate fingers. 

 The postero-lateral margins, in the species known, are very much 

 concave, with a smoothish or smooth surface. The name alludes to 

 the intermediate character of the species between Actaea and Pilum- 

 nus. 



ACTUMNUS TOMENTOSUS. 



Carapax angustus, valde convexus, subglobosus, subtiliter tomentosw, 

 anticd leviter partim areolatus ; fronte emarginato; margine a?itero- 



