BY WILLIAM A. IIASWELL, M.A., L.SC. 2G1 



than the superior pair ; fourth segment of the peduncle the longest . 

 flagellum nearly twice as long as the peduncle. Anterior 

 gnathopoda with the carpus and propodos subequal, their ventral 

 border armed with serrations beset with fasciculi of fine hairs ; 

 propodos rather longer than broad, palm transverse, not defined. 

 Posterior gnathopoda with the carpus triangular, as long as the 

 propodos, which is oblong, more than twice as long as broad, 

 twice as long as the propodos of the anterior pair, with the palm 

 oblique, undefined ; both carpus and propodos bordered ventrally 

 with a row of hair-bearing serrations. Third pair of pereiopoda 

 rather shorter than the fourth and fifth, all three bordered with 

 setae. Eami of posterior pleopoda styHforra. Telson triangular, 

 pointed. 



Length four and a half lines. 



Sab. Kiama, New South Wales. 



Genus Leucothoe, Leach. 



Leucothoc commensalis, sp. nov. (PI. X., fig. 3.) 



Body large and thick. Coxae of the second pereiojjoda deeper 

 than the rest. Eyes ovoid, black. Superior antennae nearly as 

 long as the cephalon and first three segments of the pereion, one. 

 fourth longer than the inferior pair ; first segment of the peduncle 

 very stout, occupying about one-third of the total length ; second 

 rather narrower and slightly longer than the first ; third short ; 

 flagellum as long as the second segment of the peduncle. Peduncle 

 of inferior antennae equal in length to the two first segments of 

 the peduncle of the superior pair ; flagellum very short. 

 Maxillipedes stout, pedif orm. Anterior gnathopoda rather shorter 

 than the posterior ; proximal part of carpus dilated, irregularly 

 heart-shaped ; distal prolongation slender, uniform in thickness 

 to near the end, where it tapers to a fine incurved point ; propodos 

 about three times as Jbroad as the distal process of the carpus, 

 which it equals in length, slightly narrowed distally, armed 



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