224 



rather robust and densely setous. Grnathopoda distinctly subcheliform, 

 now rather strong, and of a similar structure as in Amphilochus, now 

 comparatively feeble, and approaching in appearance to those in the genus 

 (ritana. Pereiopoda, uropoda and telson about as in the 2 preceding genera. 

 Eemarl-s. I have found it necessary to establish this new genus, 

 jn order to comprise some species formerly referred to the genus Ampliiloclws, 

 but very materially differing in the structure of the mandibles, which nearly 

 agrees with that in the genus (ritana of Boeck. The genus contains, as yet, 

 3 distinct species to be described below. 



0. Gitanopsis bispinosa, (Boeck). 



PI. 76, (fig. 2). 

 Amphilochus bispinosus, Boeck, Crust, araph. bor. ct arct. p. 51. 



Body somewhat compressed, with the back evenly vaulted in its 

 anterior part. Cephalon scarcely longer than the first 2 segments of meso- 

 some combined, rostral projection comparatively short and evenly curved, 

 not reaching beyond the middle of the basal joint of the superior antennae, 

 lateral corners somewhat produced, but obtuse at the tip. Coxal plates not 

 very large; 1st pair distinctly visible outside, subtriangular in form, 

 tapering to an obtuse denticulated point; 2nd pair nearly of same breadth 

 throughout, truncated at the tip, distal edge finely serrated; 4th pair some- 

 what narrowed in their outer part, and but little deeper than the corre- 

 sponding segment. First and 2nd segments of metasome produced at the 

 end dorsally to a spiniform recurved process. Last pair of epimeral plates 

 nearly rectangular. Eyes of moderate size, rounded oval, pigment light 

 red. Antennas much elongated, the superior ones attaining the length of 

 the cephalon and the first 3 segments of mesosome combined, 1st joint of 

 the peduncle somewhat thicker, but scarcely longer, than the 2nd, flagellum 

 nearly twice as long as the peduncle and composed of about 15 articulations, 

 each provided at the end posteriorly with a fascicle of delicate sensory 

 setse. Inferior antennae somewhat longer than the superior, and very slender 

 the 2 outer joints of the peduncle nearly equal-sized, flagellum about the 

 length of the latter joints combined, and composed of 15 16 articulations. 

 Gnathopoda comparatively rather feeble in structure, and not very unequal, 

 propodos in both oval, about twice as long as it is broad, palm very oblique, 

 somewhat curved, and not defined posteriorly by any distinct angle, its edge 

 having on each side numerous small denticles and stiff bristles, dactylus 

 everywhere clothed with fine hairs, carpus scarcely narrower than the 



