292 



3. Parcediceros lynceus, (M. Sars). 



(PI. 103 fig. 2, PI. 104, fig. 1). 

 (Ediceros lynceus, M. Sars, Christ. Vid. Selsk. Forh. 1858, p. 143. 



Body moderately robust, with broadly-vaulted back, and sharply-de- 

 fined segments, those of metasome slightly keeled dorsally. Cephalon exceed- 

 ing in length the first 2 segments of mesosome combined, frontal part hori- 

 zontally produced, and reaching somewhat beyond the basal joint of the 

 superior antennae, its tip rather tumified and vaulted above, forming only 

 a slight angle inferiorly as a rudiment of a rostrum; lateral corners 

 of cephalon somewhat produced, and sharply angular at the tip. Ante- 

 rior pairs of coxal plates a little deeper than the body, 1st pair rather 

 expanded in their outer part, distal edge oblique, biangular; the 3 succeeding 

 pairs regularly quadrangular in form. Eyes rather large, placed close together 

 at the extremity of the front, pigment yellowish red. Superior antennae (in 

 female) about the length of the cephalon and the 1st segment of mesosome com- 

 bined, and somewhat shorter than the peduncle of the inferior ones, 1st 

 joint of the peduncle nearly as long as the other 2 combined, flagellum but 

 little exceeding half the length of the peduncle, and composed of about 10 

 articulations. Inferior antennae nearly half as long as the body, penultimate 

 joint of the peduncle about the length of the last one, but much thicker, and 

 densely clothed with setae, flagellum very slender and somewhat exceeding 

 the peduncle in length, that of the young male still longer, and divided 

 into a very great number of short articulations. Anterior gnathopoda 

 about the length of the posterior, basal joint moderately dilated, propodos 

 nearly 3 times as long as the 3 preceding joints combined, palm fully as long 

 as the hind margin, which is somewhat sinuated behind the defining denticle. 

 Posterior gnathopoda with the propodos oblong oval in form, palm consider- 

 ably longer than the hind margin. Pereiopoda moderately slender, dactylus 

 about the length of the propodal joint, basal joint of last pair rather broad, 

 with the posterior edge setous. Last pair of uropoda having the rami longer 

 than the basal part, the inner one armed with a single spinule only. Telson 

 of moderate size, oval quadrangular in form, tip transversely truncated. Body 

 whitish, with a dark brownish violet pigment, arranged on the back in broad 

 transverse bands, on the sides of the cephalon in a more or less distinct 

 reticulation. Length of adult female reaching 22 mm. 



Remarks. - This form was first described by my late father, Prof. M. 

 Sars, as an (Ediceros, and is the type of the present new genus. It is easily 

 recognized from the other species, especially by the form of the frontal part 

 of the cephalon. 



