214 



basal lobes of moderate size, masticatory lobes very large, laminar, and 

 armed on the inner edge with numerous short spines, palp comparatively 

 short and stout, and but slightly projecting beyond the masticatory lobe. Grna- 

 thopoda rather feeble in structure, subequal and scarcely subcheliform. 

 Pereiopoda not very slender, the 3 posterior pairs much larger than the 2 

 anterior, and subequal both in size and structure, basal joint not very much 

 expanded. Uropoda with the rami narrowly lanceolate, and densely edged 

 with short spines, last pair having the basal part very short and thick. 

 Telson comparatively small, and deeply cleft. 



Remarks. - This genus, established by Boeck, was only with some 

 doubt referred by him to the Ampliilocliidtf, and, according to this author, it 

 should perhaps more properly be regarded as the type of a separate subfamily, 

 showing some relations to the Pardaliscidte. In my opinion, the genus has 

 also some apparent affinity to the Stegoceplialitla', and for this cause, I have 

 placed it at the head of the present family, instead of at the end, as done 

 by Boeck. 



1. Astyra abyssi, Boeck. 



(PI. 73). 

 Astyra abyssi, Boeck, Crust, amphip. bor. & arct. pag. 53. 



Body robust, with broadly vaulted back, and quite smooth. Cephalon 

 about the length of the 1st segment of mesosome, front produced to a very 

 short and blunt rostral projection, lateral corners forming a slight, rounded 

 expansion of the anterior edge, postantennal corners jutting out in the form 

 of narrow, linguiform, deflexed lobes. First segment of mesosome somewhat 

 larger than the 3 succeeding ones. First pair of coxal plates rather expanded 

 in their outer part, and nearly transversely truncated at the end; the 2 

 succeeding pairs much narrower, and tapering distally; 4th pair about twice 

 the breadth of the 3rd, tip bluntly pointed, posterior projection about in the 

 middle; 5th pair rounded quadrangular, and but slightly bilobed at the end. 

 Metasome exceeding half the length of the anterior division of the body, 

 epimeral plates rather large, those of last pair nearly rectangular. First 

 segment of urosome having dorsally a deep, saddle-shaped depression. Supe- 

 rior antennae about the length of the cephalon and the 4 anterior segments 

 of mesosome combined, 1st joint of the peduncle somewhat flattened, and 

 about as long as the other 2 combined, flagellum more than twice the length 

 of the peduncle, and composed of 20 30 articulations, the inner of which are 

 somewhat inflated, and provided posteriorly with transverse rows of delicate 



