488 



4. Melphidippella macera (Norman). 



(PI. 171.) 



Atylus mam; Norman-, Last Report on Dredging among the Shetland Isles ; Report of the 

 Brit. Assoc. for the Advancement of Science 1868, p. 280. 



Syn: Melphidippa longipes, Boeck. 



Body rather slender, but having the anterior division, especially in 



female, somewhat tumid, with broadly vaulted back. Segments of metasome 



and the 2 anterior ones of urosome each produced dorsally to a spiniform 



projection, and with the adjacent edge minutely dentated. Cephalon 



comparatively short, but very broad and deep, with a small rostral 



projection, lateral lobes much swollen, and terminating in an acute deflexed 



point Coxal plates extremely small; 1st pair subquadrangular, with the 



anterior corner slightly produced; 2nd pair obliquely truncated at the tip; 



5th pair about as deep as the preceding pair. Last pair of epimeral plates 



of metasome acutely produced at the lateral corners, and having the posterior 



edge minutely serrated. Eyes very large and convex, nearly semiglobose, 



occupying the greater part of the lateral lobes of the head, visual elements 



very numerous and densely crowded, pigment red. Superior antennae about 



the length of the body, exclusive of the urosome, 1st joint of the peduncle 



rather thick, and about the length of the other 2 combined, 3rd joint very 



small, flagellnm more than 4 times as long as the peduncle, and extremely 



slender, being composed of about 22 articulations, accessory appendage forming 



only a minute nodule carrying a number of small bristles. Inferior antennae 



in female shorter than the superior, penultimate joint of the peduncle longer 



than the last one, flagellum shorter than the peduncle, and composed of about 



7 articulations. Same antennae in male much more elongated, and scarcely 



shorter than the superior ones, penultimate joint of the peduncle somewhat 



laminar, flagellum fully as long as the peduncle, and composed of about 12 



articulations. Anterior gnathopoda with the carpus somewhat compressed, 



and densely setous on the inferior edge, propodos much shorter than the 



carpus, and oblong sub fusiform in outline, dactylus slender. Posterior 



gnathopoda somewhat more elongated than the anterior, carpus rather narrow, 



and having about 5 fascicles of slender setae on the inferior edge, propodos 



about the length of the carpus, and sublinear in form, with the palm very 



short, and the dactylus small. The 2 anterior pairs of pereiopoda with the 



meral, carpal and propodal joints nearly of equal length, and edged with 



