10 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 5 



W., 140-160 fathoms; January 29, 1938; collected by Allan Hancock 

 Expedition of 1938 at Station 817-38. 



Measurements: Female holotype: length of carapace including 

 rostrum 10.8 mm., width of carapace 5.6 mm., length of rostrum meas- 

 ured from level of preorbital spines 3.4 mm., width of rosti'um at same 

 level 1.5 mm., length of cheliped 12.6 mm., of first ambulatory 21.8 

 mm. Male allotype: length 9.6 mm., width 5.0 mm. 



Diagnosis: Postorbital spine longer than preorbital. Third and 

 fourth legs of approximately equal length. A single spine on the carpus 

 of the cheliped. Merus of the third leg entire. Carapace little produced 

 posteriorly; no tubercle in front of posterior margin. 



Description: Carapace smooth and bare, regions faintly indicated. 

 Cardiac area slightly more elevate than gastric when seen in profile. 

 Rostrum curving gently downward, its length little more than twice its 

 breadth measured from the bases of the preorbital spines; horns cleft to 

 base but contiguous the greater part of their length, diverging slightly 

 in their distal third and bearing a row of short setae on their outer 

 margins. Basal article of antenna visible in dorsal view. Preorbital spine 

 minute, postorbital spine prominent. Eyes large, eyestalks constricted 

 at base of cornea. A few scattered spinules on hepatic and branchial 

 areas. Posterior margin but little protruding; no spine or tubercle at 

 posterior median angle. 



Merus of cheliped armed with five stout spines beneath. Carpus 

 with but one spine, superodistal. Manus moderately inflated in female; 

 dactyl three fourths as long as propodus; fingers gaping in a broad oval 

 at base. First ambulatory much the longest, over twice the length of the 

 carapace, including rostrum; second ambulatory one and two-fifths 

 times the length of the carapace; third and fourth legs shorter, subequal, 

 the third being infinitesimally shorter than the fourth, its merus less 

 robust. Dactyl of first ambulatory more than four fifths the length of 

 the propodus; that of the second, three fourths the length of the 

 propodus, dentate; dactyls of legs three and four little more than one 

 half as long as of leg two, also dentate. 



Antennae extending beyond the rostrum, basal article narrow, an- 

 tennal spine minute. Antennular fossae large, incompletely divided, a 

 notch at their bases. A prominent tubercle lateral to each green-gland 

 opening. Several tiny spines on pterygostomian region. Merus of third 

 maxilliped rounded at outer angle; ischium and merus spinulous along 

 inner border, joints of palpus shortened, robust. 



