'74 



Scaphocerite (Fig. 430) a little more than half as long as the carapace and 3-times as long as 

 wide, outer margin slightly convex, for the rest resembling Bate's figure c: in the larger male 

 the carapac© is 34,5 mm. long, the scaphocerite 20 mm. long and 6,7 mm. broad, in an adult 

 ova-bearing female these numbers are 36,5 mm., 22,2 mm. and 7,1 mm. Antennal flagellum 

 of the adult male 300 mm. long, twice as long as the body. 



The external maxillipeds reach nearly, both in the male and in the female, as far forward 

 as the antennal scale. According to Spence Bate the exopodite should be reduced to a tubercle, 

 in these specimens, however, a very short, rudimentary exopodite really occurs, measuring 1 L or 

 '/ 8 the length of the long antepenultimate joint : in one of the ova-bearing females it is wanting 

 on the left side, which fact indicates that this appendage is sometimes worn off or lost, as was 

 evidently also the case in the two females taken by the "Challenger". Peraeopods of the 1 st 

 pair a little shorter than the external maxillipeds, reaching by the carpus as far forward as the 

 antennal peduncle. Shorter leg of the 2 nd pair, either on the right or on the left side, little 

 longer than the antennal peduncle; carpus 11-jointed, i st joint as long as 2 nd and 3 rd combined, 

 3 rd one and a half as long as 2 nd , 4 th nearly as long as 3 vd , 5 th — io th short, equal, a little 

 shorter than 2" d , last joint as long as i st ; fingers a little shorter than the palm, which is 

 slightly broader than the last joint of the carpus. The other slender leg appears, in the larger 

 male, as long as the external maxillipeds, while in the adult ova-bearing female it projects by 

 the chela and one-sixth of the carpus beyond the antennal scale; the carpus consists in the 

 larger male of 26, in the adult females of 29 — 34 joints, i st and last joint a little longer than 

 the others, chela as long as the two last joints combined, not broader than carpus, fingers as 

 long as the palm. The legs of the 3 rd pair reach by the whole length of the dactyli or hardly 

 more beyond the tip of the antennal scale, the 4 th are a little shorter, those of the 5 th pair 

 are again a little shorter and extend to the far end of the propodi of the 3 rd pair. The dactyli 

 are slender, long, and measure two-fifths to one-third of the propodi, in adult specimens. 



In two of the 7 adult males from Stat. 45 the rostrum is broken at the tip. Three teeth 

 stand on the carapace or the 3 rd above the orbital margin and always the 2 nd is placed nearer 

 to the i st than to the 3 rd . In these adult males the rostrum is just as long as the carapace 

 or a little longer, in one specimen (N° 9 of the Table), however, slightly shorter and in all 

 these males it is as much turned upwards as in the Challenger type or hardly 

 more, but not so strongly recurved as in the adult females from Stat. 38. In the younger 

 specimens the rostrum is comparatively longer, like in other species, in N° 12 the carapace is 

 26 mm. long, the rostrum 32 mm., in younger ones it is one and a half as long as the carapace 

 and in the two youngest individuals, of which the carapace measures 9 mm., the rostrum is 

 more than twice as long; in these young individuals it is a little more upturned than in Bate's 

 figure and the teeth, especially those of the upper margin, are comparatively longer and 

 slenderer than in the adult animal. Even in the youngest individuals the anterior half of the 

 carina of the 3 111 abdominal somite appears already grooved, while on the i st tergum the 4 

 tubercles are already visible. 



The larger male from Stat. 85 is 154 mm. long, rostrum one-fifth longer than the 

 carapace, as much recurved as in Bate's figure, in the other it is somewhat more recurved; 



