289 



Second antennal article with a well-developed spine at the antero-external angle. Scapho- 

 cerite (Fig. 6gc) in the male 1,8 mm. long, just half as long as the carapace, rostrum included, 

 and 3-times as long as broad; it shows the greatest width at the proximal third and, though 

 the lamella narrows anteriorly, the apex appears still rather broad; the outer margin, which is 

 a little concave, is armed from the base to the distal fourth with 20 or 22, very 

 small, acute teeth, as in Ponl. Lowisi; these denticles are in the middle well-developed, 

 but decrease in size both anteriorly and posteriorly, so that the three or four first and la.st of the 

 row are hardly perceptible. The terminal spine that measures Yg the length of the scaphocerite, 

 extends by its whole length beyond the tip of the lamella. The stout antennal peduncle reaches 

 to the distal third of the scale. 



In the female the upper antennular flagella are thin and slender, only one-third as broad 

 as in the male, and the elongate first joint is nearly as long as the peduncle. The scaphocerite 

 resembles that of the male, but there are only 13 or 14 teeth that reach to the distal third 

 part of the outer margin, for the rest the antennulae and antennae agree with those of the male. 



The external maxillipeds project by half their terminal joint beyond the antennal scale. 



Merus of i^' pair of peraeopods with a spine at the distal extremity of the upper border, 

 which spine is followed on the distal margin of the outer surface by three smaller spines, that 

 diminish in size towards the anterior border. Carpus with a spine at the lower angle of the 

 distal margin of the outer surface and with another at the upper. Propodus a little more than 

 half as long as the carapace, rostrum included, the proportion being in the male like i : 1,88, 

 in the female like i : 1,85; propodus in the male 3,5-, in the female 3,6-times as long as 

 broad proximally. 



The peraeopods (Fig. dc^d) of the 2"'^ pair, that are furnished with long hairs, reach 

 just beyond the carpus of the anterior legs. Merus as long as ischium, 4,5-times as long as 

 broad in the middle, carpus a little more than half as long as the merus, chela about as long, 

 though not shorter than the carpus, palm one-fourth the length of the chela and a little longer 

 than broad, proportion like 15 : 13, fingers (Fig. 696') straight, contiguous, immobile finger 

 decidedly broader than the dactylus. The measurements of these legs, in the male, are the following: 

 ischium i mm., merus 0,9 mm. long and 0,19 mm. broad in the middle, carpus 0,58 mm. long, 

 chela 0,63 mm. long (palm 0,15 mm., fingers 0,48 mm., palm 0,13 mm. broad). 



The three other peraeopods like in the related species, but in both specimens partly 

 incomplete or wanting. Of the 5''' peraeopod of the male the merus is 1,8 mm. long, the carpus 

 0,6 mm., one-third of the merus, the propodus 1,9 mm., slightly longer than the merus and 

 1 2-times as long as broad in the middle, dactylus 1,5 mm. long; the dactylus which, gradually 

 tapering, is slightly curved and very narrow, the width at the base being only '/r, the length. 

 The peraeopods of the 5''^ pair project by the dactylus beyond the antennal scale. 



Of the 2'"' pleopod (Fig. 69/", 694'-) of the male the exopodite is 1,2 mm. long and 

 0,35 mm. broad, 3,4-times as long as broad, of the usual form and distinctly longer than the 

 protopod ; endopodite 0,9 mm. long, three-fourths of the outer branch, though not yet 

 reaching to the distal third, 0,16 mm. broad in the middle, being almost 6-times as long as 

 broad, the margins, like those of the outer branch, fringed with long feathered setae. The 



SIBOGA-EXPEDITIE XXXlXa'. 37 



