169 



obliquel}' iu front of and at .s(jme distance tioin the genital aiiertuies and somewhat closer 

 to the median line than the aijertures. The whole genital area is naked. Caudal stylets 

 are wanting. 



MALE. Unknown. 



OVISACS. They ditfer mdely in size, as iig. 4a shows; in the niarsupium repre- 

 sented occurred twenty ovisacs, wliich are irregularly shaped and angular on account of 

 mutual pressure, and the largest of them which contains half developed young ones, is 

 2-73 mm. in length and 1-74 mm. in breadth, the smallest ab. ■i)2 mm. long and -75 mm. 

 broad. In another specimen the ovisacs are oval or sub-globular. 



LAEVA. None of the ovisacs contained fully developed larvae. I took some larvae 

 out of the ovisac which contained the most advanced specimens and prepared them out of 

 their membranes, so that I succeeded in giving a representation (fig. 4 d) of several of the 

 most important appendages, but about the final shape of the larva etc. no detailed account 

 can be given. The fi-ont has no decoration, at most a small list inside the anterior angle 

 of the autennulae. The olfactory seta of the antennula is tolerably short, may be about half 

 the length of the cephalothorax. The antenna3 of medium length, 4-jointed, the two tii'st 

 joints broad, the third one slender, longer than the second, the fouitli joint short, and its 

 longest terminal seta shorter than the third joint. The mouth-border exceptionally broad 

 with distinct, tliick hairs. The basal joint of the maxillae has two dense combs of fine 

 processes (one of which is not visible in the drawing), second joint is slender, third joint has 

 some spines on its inner margin. Second joint of the maxillipeds much longer than the 

 tliird; the fourth joint has thi'ee conspicuous, slender and spiniform processes at the distal 

 part of its inner margin. The abdomen of less than medium size; its first segment almost 

 longer and somewhat broader than the second one, and its long spines reach far beyond the 

 caudal stylets, wliich are distinctly set oif fi'om the small third segment. The setae of these 

 stylets seem to be proportionally pretty short. 



POST-LARVAL DEVELOPMENT. Unknown. 



HABITAT. The marsupiiun of Munnopsis typica M. Sars from the Kara Sea. 

 Fig. 4 a represents the greater part of a large specimen of the host, in which the ovisacs of 

 the parasite are visible thi-ough the diaphanous plates of the niarsupium. The niarsupium 

 was pretty strongly extended, it contained twenty ovisacs, partly with eggs, partly with 

 Nauplii or with more developed larvae, but — as stated above — none of these was ready 

 to swim out ; the above described female was lying against the ventral side of the host towards 

 its anterior end. In a smaller specimen were discovered nine ovisacs; the female and some 

 sacs had evidently been washed out. 



22 



