82 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 5 



Diagnosis: Anterior two thirds of carapace covered with raised, trun- 

 cate areoles and tubercles. Edge of front thin. Orbits with two naked, 

 thickened, lobate processes above, two below. Anterolateral margins ir- 

 regularly spinulous. Merus of walking legs with a bladelike terminal 

 spine; propodus with two laminate crests and an intervening gutter. 



Description: Carapace approximately two thirds as long as broad, 

 flattened posteriorly, deflexed anteriorly and toward the anterolateral 

 margins, regions well defined. Anterior two thirds of carapace areolate, 

 the areoles becoming increasingly upstanding and truncate anteriorly 

 and laterally, a fine pubescence between them. Posterior third of cara- 

 pace nontuberculate but coarsely and irregularly granulate. 



Front broad, truncate, about two sevenths of total width, a slight 

 median emargination, edge thin and sinuous in frontal view. (See pi. 22, 

 fig. 2.) Orbits consisting of two naked, thickened, lobate processes above 

 and two below, the former pair the better separated ; outer notch distinct. 

 Anterolateral margins armed with numerous spines and spinules, the 

 larger of which are forward curving, their accessory spinules as likely 

 to curve backward, giving the margin an exceedingly rough and irregular 

 appearance. Lateral spine coarser and longer than other marginal spines 

 and separated from them by a deep, U-shaped emargination from which 

 point the margin trends forward to the corners of the buccal cavity. 

 Principal prominences of carapace disposed as follows: three low, small 

 areoles on mesogastric area in the form of a trefoil, two larger areoles on 

 each epigastric region, the outer pair truncate and preceded by a sharp 

 cluster of spinules ; two hepatic tubercles at the same level ; two pairs of 

 truncate areoles posterior to the front; two mesobranchial areoles just 

 below the hepatic ; one inner branchial areole below the outer of the two 

 epigastric ; two broad blades at the level of the lateral spines and two clus- 

 ters of spinules above them. 



Antennules folding transversely, separation of fossae complete; basal 

 article of antennae short, barely reaching front ; second article lodged in 

 orbital hiatus. Antennae three fourths as long as width of front. Epistome 

 broad, channeled, lower edge emarginate. Merus of third maxilliped 

 roughly rectangular, anteroexternal angle produced and granulate, an- 

 terointernal angle flaring to form a substantial support for the large, 

 hairy palpus. Ischium broad, inner margin granulate, a tiny basal process 

 impinging on the exopodite. (See pi. 22, fig. 5.) 



Chelipeds unequal, merus of the larger concealed beneath carapace; 

 carpus and manus roughened by spine-tipped tubercles interspersed with 



