CBWTACKA M .\IJiC08TRACA. III. 







:!u fnm f.uiiilies designated by me as subfamilies in 1895, as only the Kntoniscida: have no repre- 

 liut as to three points the material i of real importance. The first point is that I have 

 fnimd a species of the Cryptoniscidtc in the marsupiutn of two genera of Cumacca, and no Kpicarid 

 was prt-vinu-.lv known from any form of this order. The second point is not less interesting. It is a 

 well-known fact that in the second larval stage of the Dajidae the mouth terminates in a circular, 

 M.iiK-what funnel-shaped sucking-disk, while such a disk was not known in any larva of the three 

 ntlu-r families. Now I have found that the mouth of the second larval stage of Bopyroidts hipfvlylts 

 Kr. terminates in a somewhat similar disk, thus in this respect bearing much similarity to those in 

 the larval Dajidae, while in all other features, as antennulae, antenna;, posterior legs, uropods, the larva 



Hopyroides agrees with the larvae of the Bopyridse and differs widely from those of the Dajidae 

 but consequently the analytical key to the larvae of second stage of all Hpicaridea in my Plankton- 

 paper ought to be altered as to this character. The third point of interest is, that in the marsupiutn 

 <>f two specimens of the same species of Asiacilla from the same station I found two genera of Crypt- 

 oiiiscidae, both new. -- Finally it may be emphasized that the second larval stage affords excellent 

 specific characters, especially in the antennulae, which therefore must be examined more in detail than 

 is the case. 



Family Bopyridae. 



Only three genera are known from our area, each with a single specie*. 



145. Bopyroides hippolytes Kroyer. 

 (PI. XV, figs, n a-i id). 



1838. Bofiyrus Hipfiolytcs Kroyer, Gronl. Amfip., in KgL D. Vid. Selsk. natur. math. Afd. p. 306; IT. IV, 



fig. 22. 



(7)1846. Kroyer, in Gaimard, Voy. en Scand., Crust PL 28, figs. 2 a a p. 



! 1897. Bopyroides hippolytts G. O. Sars, Account, II, p. 199; PI. 84, fig. 2. 

 19 001 Sarri Bonnier, Contrih. a L'&ude des 6pic, p. 376; PI. XLL 



9S hippolytts Richardson, Monograph, p. 567, figs. 628637 (with synonymy and 



distribution). 



To Sars' representation of both sexes I have nothing to add, and follow him in considering 

 the parasites of the three species of Spirontocaris, viz. S.polaris Sab., S. spimtu S0W, and S. LUIjekorgu 

 Dan., as belonging to the same species. 



Second larval Stage. I have examined a larva inhabiting a feeble swelling of the cara- 

 pace of S.polaris, which certainly would have developed into a female and is 1-2 mm. long, and a 

 larva placed on a very young female infesting a young S.spinus, and this larva is certainly of the 

 male sex and 0-92 mm. long. 



The body is somewhat more than three times as long as broad, and on the upper surface set 

 with extremely fine, short hairs. The front margin of the head is broadly convex. Byes black, 



