171 



The external maxillipeds that bear a well-developed exopodite, extend to the distal third 

 or fourth of the antennal scale and the legs of the i^' pair are but little shorter. Shorter leg of 

 the 2>«i pair either on the right or on the left side. The peraeopods of the y^ pair (Fig. 42^, 42/ 

 and 42 /^) are nearly as long as the antennal scales, while the following become gradually a little 

 shorter. The dactyli of the 3'^ pair measure in adult specimens (Fig. 42^?, 42^), both male and 

 female, a little more than one-third of the propodi, in young individuals (Fig. 42/) 

 of which the carapace is 23 mm. long, even slightly more than two-fifths ; they are almost 

 6-times as long as broad at base and armed along the proximal half of their posterior margin 

 with 4 or 5 rather stout' spinules that slightly increase in length from the 1^' or proximal to the 

 last. So e.g. in an adult male from Stat. 12 the propodus of the y^ legs is 10,5 mm. long, 

 the dactylus 3,8 mm. long and 0,68 mm. broad at base, in an adult ova-bearing female from 

 the same Station these numbers are, in the same succession, 10,8 mm., 4,1 mm. and 0,7 mm., 

 in a young individual, finally, from Stat. 74, of which the carapace is 23 mm. long, 7,7 mm., 

 ^,;}, mm. and 0,48 mm. 



The female from Stat. 316 proves that this species is already provided with eggs, when 

 it still only measures i 10 mm. 



Table of Measurements in millimeters. 



Carapace 

 Rostrum 



Formula 



Carapace 



Rostrum , 



Formula , 



I 



32,5 



25 

 5 

 JLA 

 7 



14 



16,5 

 22,5 



5 



1 !l 



2 

 32 



24.5 



1 5 

 M 



3 



29 



22,5 



5 

 I G 



4 



31.5 



24 



5 

 1 5 



5 

 31 



25 



4 



Iti 



15 

 16 



23 

 5 



1 8 



16 

 16 

 21 



5 

 1 8 



17 



33 



27 



5 

 1 7 



1 1 



18 



32,5 



27 



5 

 1 4 



30,5 

 26 

 5 



t 8 



7 



27 

 26 



5 



1 



19 



26 



29 



5 



1(5 



1 



20 



24 



25.5 



6 

 1 7 



TT 



26 



25.5 



5 



i(i 



10 

 21 



23.5 



28,5 

 5 



1 8 



9 



19 



24 

 5 



1 7 



10 



i8,s 



23.5 



5 

 1 5 



II 

 18 



24 



5 

 1 9 



18 



5 



1 !) 



22 



19.5 



27 



6 

 1 (i 



1 2 



1 23 



31.5 

 22,5 



5 

 1 4 



24 



30 



22 



4 

 1 2 



25 



35 

 21 



ti 



S) 



To 



13 

 18 



22,5 I 22,5 



5 



1 g 



1 2 



26 



27 

 26 



5 



1 8 



1 



Carapace . . 



Rostrum . . 



Formula . . 



N" 1—8 Stat. 12, N" I — 3 males, N" 4 — 7 ova-bearing females, N" 8 female without 

 eggs; N° 9 — 16 Stat. 38, all young; N" 17 — 22 Stat. 74, X" 17 ova-bearing female, N" 18 adult 

 male, N" 19 — 22 young specimens; N° 23 — 26 Stat. 139, N'^ 23, 24 adult males, N" 25, 26 

 ova-bearing females; N" 27 and 28 females from Stat. 212, the latter with eggs; N" 29 — 36 

 Stat. 256, N" 29 — 31 males, N" 32 — 34 females with eggs, N" 35 and 36 females without eggs 

 (N'si bears a Bopyrid in the left branchial chamber); N" 37 egg-bearing female from Stat. 262; 

 N" 38 egg-bearing female from Stat. 316. 



8. Heterocarpus dorsalis Bate. PI. X\', Fig. 43 — 43^^. 



Heterocarpus dorsalis C. Spence Bate, Report Challenger Macrura, i888, p. 630, PI. CXI. 

 >. Heterocarpus Alphonsi C. Spence Bate, I.e. 1888, p. 632, PI. C.XII, fig. i. 



