AND AT SEATON SLUICE, NOETHUMBEELAND. 29 



Platyclielipus littoralis, G. S. Brady (Plate III.). 



1880. Platychelipus littoralis, Gr. S. Brady, Monog. Brit. Co- 

 pep., vol. II., p. 103, pi. 

 LXXIX., figs. 20-23, and 

 pi. LXXX., figs. 15-19. 



1893. ,, ,, Scott, Additions to the Pauna of 



the rirth of Forth (Eleventh 

 Ann. Rep. Fishery Board for 

 Scotland), p. 205, pl.V., figs. 

 11-13. 



1893. ,, ,, Thompson, Revised Report on 



the Copepoda of Liverpool 

 Bay (Trans. Liverpool Biol. 

 Soc, voL YII.), p. 27, pi, 

 XXIL, fig. 2. 



Like Laophonte in general outline, but with unusually short 

 limbs; no constriction between thorax and abdomen, the anterior 

 abdominal being equal in width to the last thoracic segment, 

 posterior margins of the hinder abdominal segments finely pec- 

 tinated. In the female the last abdominal segment is twice 

 as long as the preceding one. Antennules of the female six- 

 jointed (?), bearing numerous short, rigid, marginal spines, and 

 at the extremity about six not very long setse : in the male the 

 antennules are short and indistinctly jointed ; the penultimate 

 joint much swollen and sub globose, the last forming a very 

 strongly curved hook. Antennae two-jointed, without any 

 secondary branch, the distal joint bearing at its extremity 

 numerous curved setse, about six of which are of considerable 

 length; the proximal half of the outer margin has a series 

 of about six smaller setse, which increase successively in length 

 from the first (or proximal) to the last ; the basal joint is larger 

 and bears a few setse, the largest of which — two on the inner 

 and one on the outer margin — are plumose. Mandible stout, 

 divided apically into several stout teeth ; palp large, elongated, 

 indistinctly trilobed, composed of one joint only, the central 

 lobe bearing three, the lateral lobes each one long plumose 

 seta. Maxilla composed of four segments, the innermost or 



