BY WILLIAM A. IIASWELL, M.A., B.SC. 273 



Genus Haplociieiea, (novum). 



Body not much compressed laterally. Upper and lower antennae 

 subequal ; superior pair without an appendage ; inferior sub- 

 pediform. Both pairs of gnathopoda simple, fringed with long 

 hair. Posterior pleopoda biranious, with unequal rami. Telson 

 single ? 



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Haplocheira typica, ap. nov. (PI. XI., fig. 2.) 



Superior antennae as long as the cephalon and first three 

 segments of the pereion ; first and second segments of the peduncle 

 of nearly equal length, first stouter than second ; third half as 

 long as the latter ; flagellum as long as the last two segments of 

 the peduncle, hairy. Inferior antennae subequal with the superior 

 pair; peduncle armed with a few hairs, longer than that of the 

 superior pair, fourth and fifth joints subequal ; flagellum shorter 

 than the last segment of the peduncle, composed of four articuli, 

 each armed with pointed, slightly hooked spines and a few short 

 hairs. Anterior gnathopoda with the propodos long and narrow ; 

 the meros, carpus and propodos fringed with long slender hairs. 

 Posterior gnathopoda longer and more slender than the anterior 

 pair, bordered like the latter with numerous long delicate hairs ; 

 ischium and meros small ; carpus and propodos of nearly equal 

 length — the latter tapering distally ; dactylos small. Pereiopocla 

 short, stout; three anterior pairs subequal, fourth and fifth longer. 

 Fourth pair of pleopoda armed on the protopodite and each ramus 

 with a row of spines which are acute and slightly curved at the 

 tip ; fifth pair shorter than the fourth, armed with similar but 

 shorter spines ; sixth pair with the rami short conical unequal, 

 the outer armed with a few short stout spines, the inner terminated 

 by a few hairs. Telson cleft, armed with short blunt spines. 

 Colour dark grey. 



Length three and a half lines. 



Ilob. Port Jackson ; under stones at low-water mark. 



