new Crustacea from Devon and Cornivall. 300 



the inner margin, -while the third joint bears only two terminal 

 spines, the inner one stout and about twice as long as the 

 other. Fifth pair very small ; each foot consists of a single 

 joint which bears two small terminal setae. 



The abdomen is moderately slender and composed of four 

 segments ; the genital segment is somewhat dilated and 

 about equal in length to next three segments taken together; 

 the second and third segments are small, while the fourth is 

 rather longer than the preceding one. 



The furcal joints are about twice as long as the last abdo- 

 minal segment ; each joint is furnished with several terminal 

 setas, and a single small bristle springs from near the middle 

 of the outer edge. 



Hab. Taken in Plymouth Sound, among Hydrozoa &c, 

 near low-water, in August 1903 ; rare. 



This small species resembles a diminutive P seudanthessius 

 gracilis, but the structure of the fourth pair of thoracic legs 

 shows that its relationship is with Ganu's genus Herrmann- 

 ella. It differs, however, from any Herrmannella hitherto 

 described by the form of the mandibles, the proportional 

 lengths of the abdominal and furcal joints, and one or two 

 other points mentioned in the description. 



