74 AMl'nirODA N0B2JALIA. 



4. Anonyx obesus, n. s. (Plate XII. fig. 1.) B.M. 



Animal not much compressed ; three posterior segments of the pleon 

 very short, the three anterior very deep, Superior antenna; having 

 a secondary appendage as long as the flagellum ; inferior antennae 

 scarcely longer than the superior. First pair of gnathopoda 

 strong, having the propodos tapering ; palm very ohlique, em- 

 bracing nearly the whole of the inferior margin, and defined 

 by one or two short stout spines ; carpus produced inferiorly ; the 

 superior margins of the carpus and propodos together arcuate. 

 Second pair of gnathopoda having the carpus and propodos sub- 

 equal, and tufted with cilia. Three posterior pairs of pleopoda 

 clean. Telson obtuse, cleft into two round plates. 



Length ^ths of an inch. 



Hah. Moray Frith {Mr. Edward). 



The animal may be readily distinguished from the other species 

 by its fat and corpulent appearance, from which its name is derived. 



5. Anon3rx denticulatus. (Plate XII. fig. 2.) B.M. 



Anonyx denticulatus, Spence Bate, Brit. Assoc, H^ort, 1855 ; Si/n- 

 opsis, ^'C, Ann. Nat. Hist. Feb. 1857. 



Pleon having the infero-posterior angle of the second and third 

 segments produced into a tooth, that of the third long, and 

 directed upwards at right angles to the posterior margin of the 

 segment. Superior antennae having the second joint of the pedun- 

 cle short ; third very short, shorter below than above ; second- 

 ary appendage consisting of one long and two short joints ; first 

 joint of flagellum longer than secondary appendage, and furnished 

 upon the inner side with two longitudinal series of transverse rows 

 of short hairs ; the remaining joints of the flageUum (about 13) 

 together scarcely longer than the first joint. Inferior pair of an- 

 tennae more than haK the length of the animal. Mandibles having 

 each extremity of the incisive edge produced beyond the inter- 

 mediate portion, and having short obtuse spines on the squami- 

 form plate. First pair of gnathopoda having the carpus as long 

 as the propodos ; the palm convex, not defined, continuous with 

 the inferior margin, distinctly pectinated ; dactylos long, simple. 

 Second pair of gnathopoda minutely chelate, and protected and 

 hid by much hair, fiinged at the margin. Pereiopoda having the 

 dactylos very long. Posterior pair of pleopoda scarcely longer 

 than the preceding. Telson oval, deeply cleft, the apex of each 

 division terminating in a minute obtuse spine. 



Length ^ths of an inch. 



Some of the hairs upon the propodos of the first pair of gnatho- 



