AUSTRALIAN MALACOSTEACA. 265 



length of the superior pair, sub-pediform, the peduncle orna- 

 mented below with fasciculi of longish slender hairs ; flagellum 

 shorter than the last segment, ornamented with a few slender 

 hairs on each articulus, and with a few stouter hooked hairs at 

 the apex. Anterior gnathopoda with the carpus and propodos 

 nearly equal in length, the former sub-triangular, the latter 

 ovate ; palm nearly longitudinal, scarcely defined. Posterior 

 gnathopoda similar in shape to the anterior pair, but smaller, 

 and with the palm directed a little more transversely. Two 

 anterior pairs of pereiopoda short, stout ; third pair shorter than 

 the fourth ; fifth much longer than the fourth, slender. Fourth 

 and fifth pairs of pleopoda with stout, straight spines ; sixth pair 

 with two or three spines like those of the preceding pairs, and 

 with two or three longer and more slender spines or hairs, which 

 are slightly curved at the apex. Telson thick, truncate, armed 

 above with two or three slender spines. Length i in. 



Clark Island, Port Jackson. 



464. Microdeutopus chelifer. 



Microdeutopus chelifer, Haswell, 1. c, p. 240, pi. xxii. fig. 3. 



Eyes small, round. Superior antenna; nearly as long as the 

 cephalon and the first six segments of the pereion ; flagellum 

 longer than the peduncle, appendage of three articuli. Inferior 

 antennse sub-pediform, nearly as long as the sujjerior ; peduncle 

 stout, much longer than that of the anterior pair ; flagellum 

 shorter than the last segment of the peduncle, obscurely multi- 

 articulate. Anterior gnathopoda very large ; carpus much larger 

 than the propodos, rounded proximally, becoming broader towards 

 the distal end, its distal border transverse, armed inferiorly with 

 two prominent teeth, of which the outer is longer and sharper 

 than the inner ; propodos much narrower than the carpus, 

 articulating with less than the upper two-thirds of the distal 

 border of the latter, twice as long as broad, convex above, concave 

 below, the inferior border armed with a small tubercle near the 

 proximal end, palm not defined ; dactylos with a few spine-like 

 teeth on its inner border. Posterior gnathopoda small ; carpus 

 and propodos subequal, the latter rather the longer, the former 

 ovate ; palm undefined. Two anterior pairs of pereiopoda stout ; 

 three posterior pairs with the basa long-ovate ; the third pair 



