's RIJKS MUSEUM VAN NATUURLIJKE HISTORIE — LEIDEN 59 



of the uropod. Like in Call, armata an inner portion of the upper sur- 

 face of the outer uropod appears rather much concave; on the ridge by 

 which, close to the basal joint, this concavity is denned, one observes a 

 minute acute spinule, followed close to it by a very small rounded 

 tubercle. The inner uropod that extends to just beyond the middle of 

 the outer, has also another form than in Call, armata: while in this 

 species it appears lanceolate, presenting only an anterior and a posterior 

 margin, in Call, vigilax it is distinctly triangular. The anterior 

 margin is nearly straight, while the almost straight posterior margin 

 passes with a regular curve into the short inner border. The upper sur- 

 face is traversed, nearly in the middle, by a ridge that almost extends 

 to the posterior margin; the latter is fringed with short hairs and 

 there is a tuft of longer hairs close to and posterior to the obtuse 

 apical angle. 



The ophthalmopods that are contiguous, reaching almost the distal 

 end of 1 st antennular article, are hardly longer than broad; their convex 

 outer margin is slightly emarginate just in front of the eyes, so that 

 they terminate anteriorly in a flattened rounded lobe which at its outer 

 margin, near the emargination, is armed with a microscopical acute 

 tooth. This minute tooth may easily be overlooked, but it is distinctly 

 visible in a lateral view of the animal. In a lateral aspect of the 

 ophthalmopods the rounded terminal lobe appears flattened, lamellate, 

 much thinner than the rest of the stalk. Eyes rather convex, the 

 dark-brown cornea situated as far forward as the rostral point, twice as 

 far distant from this point as from the outer margin of the stalk. 



Inner antennae 18,5 mm. long, little shorter than the carapace. 

 Second antennular article hardly longer than broad and a little shorter 

 than 1 st article; 3 rd article twice as long as 2 nd , somewhat tapering dis- 

 tally. Flagella of equal length, twice as long as the peduncle, the thinner 

 upper flagellum composed of about 60 joints, the lower of nearly 40; 

 upper flagellum slightly widened not far from the extremity, lower 

 tapering to the end. Like in Call, armata the antennal peduncle extends 

 almost by the whole length of the terminal article beyond that of the 

 inner antennae; terminal joint a little shorter than the penultimate. 



External maxillipeds (Fig. 4) closely resembling those of Call, armata, 

 but the ischium, 5,5 mm. long and 3,2 mm. broad, while the merus is 

 3,6 mm. long, appears a little longer in proportion to its width and in 

 proportion to the length of the merus. 



Smaller cheliped (Fig. 5), situated on the left side, of a more 

 slender shape than that of Call, armata. Ischium slender, 5-times as 

 long as broad in the middle, somewhat widening towards the distal 

 extremity, less so towards the proximal; this joint, the upper margin of 



