'75 



while in the former 3 teeth stand on the carapace, in the younger male the y'^ tooth is placed 

 above the orbital margin. In both the subterminal tubercle of the carapacial carina is jjresent. 



The youngest of the three ova-bearing females, taken north of Menado, is of much 

 interest, not only on account of its small size, this specimen being only 113 mm. long, so 

 that we may conclude that at this age Heteroc. dorsalis bears already eggs, but also on 

 account of the following. The slender, tapering and jjointed rostrum, a little more than one 

 and a half as long as the carapace, is as much upturned as in the Challenger type and, like 

 in Bate's female, the 3"^ tooth is placed above the eye, a little in front of the 

 orbital margin, but the 2"'^ tooth is almost twice as far distant from the 3''i as from the i*'; 

 in one of the two other ova-bearing females that are of equal size, the 3'''^ tooth stands just 

 beyond the orbital margin, but the 2""^ is placed midway between the i*' and the 3"', in the 

 male, however, the 3'''' tooth is placed like in the youngest female and the 2°'' is almost one 

 and a half as far distant from the 3"^^ ^s from the i^'. In these specimens the teeth of the 

 upper margin are as far distant from one another as in the Challenger type. 



Of the larger specimen from Stat. 178 the carapace is 18,5 mm. long, the rostrum is 

 incomplete, but the proximal teeth of the upper margin stand like in the Challenger ty]je and 

 the 2°'^' tooth is hardly farther distant from the i""^ above the eye than from the i^'-, in this 

 specimen the branchiostegal spine reaches not so far forward as the orbital spine, though beyond 

 the 2°'^ joint of the antennal peduncle. In the other specimen the rostrum is twice as long as 

 the carapace and the 3'''^ tooth stands also just beyond the orbital margin; the 4 tubercles on 

 the i^' abdominal somite are already present. In the very young individual from Stat. 211 the 

 rostrum is more than twice as long as the carapace, little upturned and 3 teeth stand on the 

 latter; like in other young specimens the foremost tooth of the upper margin is placed not far 

 from the e.xtremity of the rostrum, almost 4-times as far distant from the penultimate as from 

 the e.xtremity and so small that it may easily be overlooked. 



The rostrum of the female of medium size from the Kei-islands is strongly recurved 

 and a little more than one-third longer than the carapace-, three teeth on the carapace, the 

 4''^ just beyond the orbital margin. Dactyli of i^^ legs almost half as long as the projiodi 

 (4 mm., 8,5 mm.). 



The male from Stat. 297 is almost full-grown. Of the 14 teeth of the moderately upcurved 

 rostrum three stand on the carapace, the 2"'^ midway between the i**' and the 3'''' and the two 

 foremost teeth are rudimentary, almost invisible. Dactyli of the three posterior legs almost half 

 as long as the propodi, those of the 3''^ pair 4,5 mm. long, the projjodi 10,5 mm. 



The egg-laden female from Stat. 300 (Fig. 43/) is also nearly full-grown, the rostrum 

 closely resembles that of the Challenger type; 3"''^ tooth above the eye, twice as far di-stant 

 from the 2'"' as the 2°'' from the i^', teeth of the upper margin as far distant as in B.vte's female, 

 foremost tooth near ape.x rudimentary. Also as regards the proportion between the length of 

 carapace and rostrum, which is according to Spexce Bate like 5 : 7, this female agrees with 

 the type. (It was, of course, a slip of the pen, when 80 mm. (3,1 inch) were indicated as the 

 entire length, while carapace, rostrum and abdomen are described as 25 mm., 35 mm. and 

 55 mm. long.) 



