222 



except in the adult female from Stat. 74, in whieh the antennal scale (Fig. 54a) is more rounded 

 distally ; in this female the scale is 12 mm. long and 8 mm. broad, just one and a half as 

 long as broad, while in the other specimens it is a little less broad, these numbers being in 

 the adult female from Stat. 38 11,3 mm. and 6,7 mm., in the male from Stat. 74 8,5 mm. and 

 5 mm., in the young female (Fig. 54^) from Stat. 38, finally, 5,3 mm. and 3 mm. 



The external maxillipeds reach to the tip of the antennal scale, while the legs of the 

 i st pair, with the dactylus extended, reach to or just beyond the distal end of the penultimate 

 joint of the former; the peraeopods of the 2 ml pair project by the chela and the three distal 

 joints of the carpus beyond the tip of the antennal scale, those of the 3 ld pair reach the tip 

 of the scale, while the 4 th and the 5 th pair regularly decrease in length, the 5 th reaching as 

 far as the i st . The propodi of the 4 th and 5 th pair (Fig. 54^, 54/) end in a brush of setae and 

 their dactylus (Fig. 547', 54 k) is vertically compressed, lanceolate and grooved along its whole 

 length; the propodus (Fig. 540?) of the 3 rd pair has no brush of setae and the dactylus 

 (Fig. 54//, 54 /) is less distinctly grooved. According to Spence Bate the dactylus of the 3 rd and 

 4 th pair should be cylindrical, pointed, that of the 5 lh laterally compressed and lanceolate. 



Eggs few in number, large, 3,5 mm. long. 



In the adult female from Stat. 74 carapace and rostrum, taken together, measure 47 mm., 

 the abdomen from the tip of the median tooth on i st somite to tip of telson 66 mm., entire 

 length 113 mm., measured in the middle line; in the male from the same Station these numbers 

 are in the same succession 36 mm., 46 mm. and 82 mm. 



The young specimen from Stat. 45 is 30,5 mm. long, the carapace with rostrum measuring 

 14,5 mm., the abdomen 16 mm. It closely resembles the young female from Stat. 38 which is 

 52 mm. long (carapace -f rostrum 23,5 mm., abdomen 28,5 mm.), but, while in this female 

 already some granules are observed between the crests and ridges of carapace and abdomen, 

 in this specimen from Stat. 45 they are still nearly all wanting, for there are only traces of 3 or 

 4 granules between the posterior moieties of the dorsal and subdorsal crests of the carapace. 

 The rostrum reaches still by almost half its length beyond the antennal scale. Orbital spine 

 directed obliquely upward and slightly outward, branchiostegal spine hardly longer. Posterior 

 half of subdorsal crest divided by three notches into four tubercles, of which the foremost but 

 one is larger or longer than the rest. Posterior moiety of dorso-lateral crest notched nearly in 

 the middle, distal extremity angular, tooth-like, while the two tubercles near the posterior 

 extremity of the lateral crest are still rudimentary. Eyes still straw-coloured. The antennal scale 

 bears a small spinule a little before the middle of its outer margin, in the young female 

 from Stat. 38 this spinule still occurs, though already a little behind the middle, but in the 

 other larger specimens it exists no more, the outer margin appearing only more or less angular 

 at the level of the posterior fifth. 



Glyphocrangon Investigatoris W.-Mas. from the Bay of Bengal, the Andaman and the 

 Arabian Seas should in my opinion be regarded as identical with this species. Alcock's 

 description of 1901 accords perfectly well with the specimens collected by the "Siboga"; in fig. 3, 

 Plate VI, of the "Illustrations" the posterior half of the 3 ld or dorso-lateral and that of the 

 4 th or lateral crests of the carapace appear to be dentate, which fact was already described 



