267 



" This interesting little crab was obtained by Mr. James Richardson 

 in 1872 from Skidegate Inlet, west of Alliford Bay, Queen Charlotte 

 Islands, and is preserved in a hard black limestone-nodule containing 

 plant-remains. Portions of the limbs still remain in tlieir normal posi- 

 tion, showing that it was entire when originally buried in the matrix. 

 "Length of carapace 20millim., greatest breadth 17 millim. ; breadth of 

 posterior border 14 millim.; breadth across hepatic region 14 millim. 



"The carapace is broadly quadrilateral, but pointed in front; the 

 branchial regions extend to fully one half the length of the carapace ; 

 they are roughly triangular in shape, and nearly meet on the middle line 

 behind the cardiac region ; cardiac region small, shield-shaped but ele- 

 vated ; metagastric region marked by two small prominences ; hepatic 

 regions prominent. Two very distinct and almost parallel furrows, the 

 branchial furrow and cervical or hepatic furrow, diverge from the sides 

 of the cardiac and metagastric regions obliquely forward towards the 

 lateral margins of the carapace. Two deep subtuedian furrows mark the 

 frontal portion of the cephalothorax ; reaching to the rostrum, where 

 they converge on the central line. Two small spines (or other appen- 

 dages) project (as in the genus Latreillia) from the rostrum on either 

 side. 



"The hinder border is extremely wide and straight, and suggests the 

 broad margin for the attachment of the tail as in the females of all the 

 Anomala, in which section the abdomen is only partially concealed be- 

 neath the cephalothorax. 



" The surface of the carapace, which is tumid, is coarsely and irregularly 

 covered with small rounded tubercles, which are larger on the gastric and 

 hepatic regions. 



"The walking legs were evidently long and fairly large, and the cheli- 

 peds covered and tuberculated as in Homola. 



" This species has many points of resemblance to Reuss's Prosopon 

 verr7icosum, from which, however, it diflers in the greater anterior 

 breadth of Reuss's specimen, and in the form of the rostrum and arrange- 

 ment of the furrows upon the gastric and cardiac regions. Reuss's P. 

 verrucosum should probably be placed in Bell's genus Homolopsis. 



"In Homolopsis Edwardsii, Bell, from the Gault of Folkestone, the 

 frontal border is broader and the carapace more quadrate than in the 

 North American form, which is pointed in front ; the anterior half of the 

 carapace in IJ. Edwardsii is more coarsely ornamented with fewer and 

 larger tubercules, and the arrangement of the lobes differs considerably 

 from that in II. Richardsoni. 



" I would refer this specimen to Homolopsis, and dedicate this species to 

 the discoverer, Mr. James Richardson. 



