268 



2b. p 7 . Same, leg of 7th pair, exhibiting 

 in its interior the corresponding 

 Cryptoniscid leg. 



2b. urs. Same, extremity of tail, showing 

 the Cryptoniscid uropoda in process 

 of formation within the Microniscid 

 uropoda. 



Cryptoniscid larva in last stage, 

 supposed to have developed from 

 the Microniscus 2a, b ; dorsal view. 

 Same, cephalon and 1st pedigerous 

 segment from below (right inferior 

 antennae and left 1st leg omitted). 

 Same, leg of 7th pair. 



2c. 



2c. C. 



2c. ] 



2c. Urs. Same, extremity of tail, dorsal view. 



PI. 93. 

 Dajus mysidis Kroyer. 



Mysis. Anterior part of a specimen of 

 Mysis mixta infested with- this 

 parasite, viewed from left side 

 (antennae, eyes and legs of the host 

 omitted). 

 $ad. Adult, oviferous female, with 



attached male; ventral view. 

 $ad*. Same, dorsal view. 

 Or. ar. Oral area, with the sternal plate ; 

 ventral view (right maxilliped ' 

 removed). 

 Lat. ar. Eight part of the postoral area, 

 with the corresponding 5 legs and 

 incubatory plates; ventral view, 

 mp. Maxilliped. 



p. Leg. 



$urp. Extremity of tail, with the uropoda. 

 cf • Adult male, dorsal view, 



cf *. Same, viewed from left side. 



cfC. Same, cephalon and 1st pedigerous 



segment, from below (right 1st leg- 

 omitted). 

 <?urp. Same, extremity of tail, with the 

 rudimentary uropoda ; dorsal view. 

 9juv. Young female, with the incubatory 

 cavities not yet developed; dorsal 

 and ventral views. 

 9juv*. Same, viewed from left side. 

 $juv*. Same, more highly magnified, from 

 below (extremity of tail not drawn). 



PI. 94. 

 Dajus mysidis (continued). 



ft'-av 1 . Immature female, dorsal and ven- 

 tral views. 



9juv 1 .C. Same, anterior part of body from 

 below. 



$juv 2 . Very young female, immediately 

 after the transformation; dorsal and 

 ventral views. 



9juv. 2 *. Same, viewed from left side. 



9juv 2 . Urs. Same, extremity of tail. 



Cflarv. Young male in last larval stage, 

 dorsal and lateral views. 



P 7 . 



Urs 



Embr. 

 Larv. 



cflarv.C. Same, cephalon and 1st pedigerous 

 segment, from below (right inferior 

 antennae and right 1st leg omitted). 

 Same, leg of the pair. 

 Same, extremity of tail, dorsal 

 view. 



Embryo in an advanced stage, ven- 

 tral and lateral views. 

 1st free larval stage, taken during 

 Nansen's Polar Expedition, and 

 supposed to belong to this species; 

 ventral and dorsal views. 



PI. 95. 



Notophryxus ovoides, G. 0. Sars. 

 X. Posterior part of body of a speci- 



men of Amblyops abbreviata infested 

 with this parasite, viewed from left 

 side. 

 $ad. Adult, ovigerous female, dorsal and 

 ventral views. 



Younger female, viewed from left 

 side. 



Same, ventral view. 

 Ventr. ar. Anterior part of ventral face of 

 an adult female, exhibiting on right 

 side the corresponding maxilliped, 

 incubatory plate, legs and coxal 

 plates. On left side all these parts 

 are removed, in order to show the 

 underlying large sternal plate. 

 Oral cone, with the projecting ends 

 of the mandibles. 

 Maxilliped. 



Left incubatory plate, from the 

 upper face. 

 Leg. 



Adult male, dorsal view. 

 Same, viewed from left side. 

 Same, cephalon and 1st pedigerous 

 segment from below (right inferior 

 antenna and left 1st leg omitted). 

 Same, leg of 2nd pair. 

 1st larval stage found in one of 

 the incubatory cavities of a female 

 which had discharched the greater- 

 part of its brood; dorsal and ven- 

 tral views. 



PI. 96. 



Aspidophryxus peltatus, G. o. Sars. 



X. Anterior part of a specimen of 



Erythrops Goesii infested with this 

 parasite, viewed from left side (legs 

 of the host omitted). 



cfad. Adult, ovigerous female, dorsal 

 view. 



cfad*. Same, with attached male; ventral 

 view. 



Ventr. ar. Mediane part of ventral lace of 

 an adult female, exhibiting anteri- 

 orly the large frontal shield, suc- 

 ceeded by the rounded postoral 



9juv 

 9juv. 



Or. ar. 



mp. 

 1. 



cfp 

 Cf. 

 Cf* 



cfc 



Cfp 2 . 

 Larv 



