Ill 



especially the 3 posterior pairs, the joints of which are in parts much expanded. 

 Last pair of uropoda extremely small, with the rami quite naked. Telsun 

 short and broad, rounded, slightly incised posteriorly. 



Benmrlts. The present genus has been established by Px.eek in 



order to include a form which, though resembling the species of (hH:*inmx in 

 its outer habitus, yet exhibits considerable difference in certain characters of 

 apparently generic value, thus in the structure of the oral parts and in that 

 of the anterior gnathopoda. It contains as yet but a single species. 



50. Menigrates obtusifrons, Boeck. 



(PI. 38, fig. 1.) 



Anonyx obtusifrons, Boeck. Forhandl. ved de Skand. Natnrf. Sde Mode 1860, p. (513. 



Syn Anonyx brachycercus, Lilljeborg. 



Anonyx plautus, Sp. Bate (not Kroyer). 



Body very robust and much tumeficated, with broadly vaulted back". 

 Cephalon shorter than the 1st segment of mesosome, lateral corners somewhat 

 produced and angular at the tip. Anterior coxal plates nearly twice as deep 

 as the body and successively increasing in size posteriorly; 4th pair but 

 slightly expanded in their lower part; 5th pair rather large, about as deep 

 as broad, and produced at the infero-posterior corners to a short deflexed lobe. 

 Last pair of epimeral plates of metasome drawn out at the lateral corners 

 to a short triangular upturned projection. First segment of urosome scarcely 

 impressed dorsally. Eyes of moderate size, oval or reniform, pigment red. 

 Superior antennae in female scarcely longer than the cephalon and the 1st 

 segment of mesosome combined; peduncle much tumeficated, with the 2 outer 

 joints very short; flagellum but little longer than the peduncle and composed 

 of 8 articulations only, the 1st of which equals in length the 3 succeeding 

 ones combined ; accessory appendage exceeding half the length of the flagellum 

 and 4-articulate, 1st joint by far the largest. Inferior antennse in female 

 scarcely longer than the superior, flagellum 8-articulate ; in male a little more 

 elongated, with the flagellum, like that of the superior, composed of a greater 

 number of articulations. Anterior gnathopoda rather powerful; propodos 

 nearly twice the length of the carpus, somewhat curved and gradually taper- 

 ing distally, dactylus strong and curved. Posterior gnathopoda with the 

 propodos about half the length of the carpus, oblong oval, scarcely dilated 

 distally. Posterior pereiopoda very short and robust, of much the same 

 appearance as in Onesiimts plmihis, the meral joint being considerably ex- 

 panded and the basal joint, especially of the last pair, very large. Last pair 

 of uropoda scarcely reaching to the end of the preceding pair, inner minus 

 simple lanceolate and a little shorter than the outer. Telson about as broad 



