12 



J. R. Kjnahan on the Britannic Species of 



Rostrum short, narrowed, attaining apex of eye, and longer than external 

 angle of orbit, concave above, its apex rounded ; orbits narrower and deeper 

 than last, ciliated at outer edge only; carapace moderately broad, rounded 

 above, somewhat elongated in form ; its surface covered with rows of scale- 

 like knobs and teeth, as follows : — behind the rostrum a transverse row of five 

 teeth, whereof three belong to the gastric and two to the branchial regions; 

 each of the gastric teeth terminates a longitudinal row of minute teeth, extend- 

 ing to posterior margin of carapace. A similar row of minute teeth passes 

 backwards and inwards from the branchial teeth, and joins the lateral gastric 

 line of its own side at a point situate at about half way down the carapace, the 

 posterior part of each lateral region being smooth. 



The first pair of chelipeds attain to the end of the accessory antennal plate; 

 the propodos is narrow, its sides nearly parallel, the palm oblique, extending 

 about one-third down the internal margin of the articulation ; the dactylos is 

 short, strong, and spiniform ; the carpus is smooth ; the meros smooth, termi- 

 nating in a pointed tooth externally ; the second pair of chelipeds as in last ; 

 the third pair very slender, long ; the fourth and fifth as last. 



The external maxillipeds as Cheraphilus hispinosus. 



External antennae moderately long, their accessory scale short, broad, and 

 truncate ; hyposternal tooth as Cheraphilus hispinosus. 



The abdomen tapering, and rounded above; the first to fourth somites gra- 

 dually narrowing, smooth above ; the fifth somite with a central triangular ele- 

 vation at posterior border ; sixth obsoletely bicarinated, not sulcate, the carinse 

 knobbed. 



Telson elongate, triangular, concave at base ; posterior pleopods and acces- 

 sory scale long and narrow. 



Colour, pellucid grey, with dark dots. 



Length, 0'6 inch. 



Habitat, black coarse sand. 



Locality, off the Gobbius, Belfast, 1858. 



Three specimens of this previously undescribed species occurred to me off 

 the Gobbins, one of which was in ova. 



In ova in September ; ova greyish. 



In appearance this species resembles .lEgeou fasciatus. There can be no 



