30 HISTORY OE BRITISH CRUSTACEA. 



The large PartAenqpe, from which the family name is de- 

 rived, looks like a piece of rock, corroded by the action of 

 the waves. 



Gen. 7. EURYNOME, Leach. 



Eyes retractile ; hands more or less triangular, and armed 

 with teeth. Carapace covered with asperities. Beak hori- 

 zontal, and divided into two triangular horns. Outer an- 

 tennae with the first joint ending at the inner angle of the 

 orbit, the next joint springing from its upper edge, so that 

 the movable stem, which is prolonged under the beak, 

 seems to spring from the inner canthus of the eyes. Abdo- 

 men in both sexes of seven joints. 



Euryxome aspera. Stray-berry Crab. (Plate II. fig. 2.) 

 — Of a rosy colour with bluish tints, rugose, with a large 

 triangular tooth at the outer angle of the orbit, and three 

 or four smaller ones along the side margin on the branchial 

 region. Anterior legs tubercular, slightly compressed, nearly 

 straight in the female : the other legs rugose, and furnished 

 with a crest which is most distinct on the third joint. 



Found in deep water, though not very commonly, on 

 various parts of the coast. The Rev. G. Gordon found it 

 at Lossie Mouth, in the Moray Firth. Dr. James Howden 



