230 ATJSTEALIAN MALACOSTEACA. 



416. Oyproidia ornata. A.M. 

 Oyproidia ornata, Haswell, 1. c, Vol. iv., p. 320, pi. xviii. fig. 1. 

 Cephalon with a slight rostral prolongation. Eyes round. 



Superior antennae nearly as long as the cephalon and the first two 

 segments of the pereion ; first segment of the peduncle stout, half 

 as long as the cephalon ; second segment longer and narrower 

 than the first, ending distally in an upper, longer, and a lower, 

 shorter, blunt tooth ; third segment similar to the articuli of 'the 

 flagellum ; flagellum equal in length to the peduncle. Inferior 

 antennae about equal in length to the superior pair, inserted 

 considerably behind the latter ; second joint of the peduncle the 

 longest ; flagellum shorter than the last segment of the peduncle, 

 of four or five articuli. Mandibles with a three- jointed palp ; the 

 incisive edge armed with eight conical teeth. Maxillipedes with 

 the dactylos long, pointed. Anterior gnathopoda having the 

 carpus triangular, its distal and -inferior angle produced and 

 armed terminally with a few spines ; propodos ovoid, narrowed 

 distally, longer than the carpus, palm not defined ; dactylos 

 slender, acute, about two-thirds of the length of the propodos, its 

 inner border armed in about a half of its extent with fine denticles. 

 Posterior gnathopoda with the ischium, meros, and carpus, each 

 produced distally and inferiorly ; ischium short, its process longer 

 than its body, gently curved, armed with one or two setae ; meros 

 a little longer than the ischium, its process very short, armed at 

 the extremity with a few setae ; carpus large, the infero-distal 

 process longer than the body, pointed and nearly straight, armed 

 internally with a row of setae ; propodos a little longer than the 

 process of the carpus, oblong, twice as long as broad ; dactylos 

 short, stout. Pereiopoda subequal, slender, the basa very narrow. 

 Three posterior pairs of pleopoda biramous, devoid of setae, the 

 rami styliform, slender, pointed and slightly curved. Telson 

 sub-conical, laterally compressed, subacute. Colour light pink, 

 with minute brown and red dots forming a lobed pattern on the 

 coxae. Length -^ in. 

 Port Jackson ; Port Stephens. 



417. Oyproidia lineata. A.M. 

 Oyproidia lineata, Haswell, I. c, p. 321, pi. xviii., fig. 2. 

 Body very convex. Lateral plates rather deeper than the 



pereion ; the division between the two constituent coxae geniculate. 



