Miscellaneous. 13.") 



rulla mierocepliala. Tho female differs from Sjihrronelhi Lenclcarti 

 in tho small size of the cephalic portion when compared with tho 

 total mass of tho body. The buccal ajjparatiis is more simple. We 

 have distinguished but one pair of mandibles, which, it is true, aro 

 very stout, and project by tlieir free extremity in tlie centre of tlio 

 sucker. The tirst pair of maxillipcdes is better developed than the 

 second, contrary to wliat is tho case in .S^. Leuckarti. The trenital 

 area exhibits a dift'erent arraiifjemcnt. The corneous pa])ilhp aro 

 very large and represent tlie ovacuatory apertures of two cement- 

 glands. These ceraeiit-gjLinds must not be confonnded with tho 

 coUeterial glands which secrete the substance of the onsacs, and 

 which open in the immediate \"icinity of the female aperture. 



Wo have counted as many as nine sacs of ova around a single 

 female. Each sac may contain from sixty to eighty eggs with 

 a very bulky germinal vesicle and a very distinct germinal spot. 



Segmentation is epibolic. The endodermic macrospheres contain 

 large fatty globules, analogous to those whicl\ are seen in the eggs 

 of many hshes. We have not met with fully-developed embryos. 



The genus Salenslrid, of which but a single s])ccimcn has come 

 into our ])Ossession, in consequence of the degiadation of the adult 

 female, is allied to Choniostoma and still more to Aspvdi'cln. Tho 

 body of the female is irregularly pyriform, with a conical buccal 

 region. 



All trace of masticatory or locoiuotory appendages has entirely 

 disappeared. We only find at the head an apparatus for attachment 

 in the shape of an amphidisk or sleeve-link. The genital area is 

 more simple than in ^]>lui'ronella. There is nothing in the shape of 

 ornament, except a chitinous hair situated on tho inner side of each 

 female aperture. 



In the neighbourhood of these apertures we have found three 

 dwarf males. These exhibit a very interesting peculiarity. They 

 have not undergone the regressive metamorphosis which we observe 

 in tho case of the males of Sj-thcurondla Leuckai-ti and Aspidrpcia 

 Normani'. they have retained the characteristic shape of the embryos 

 of SplurrontUa and C/ioniostoma. Xeverthelcss the existence of the 

 two enormous spheroidal reservoirs, which are regarded as spemia- 

 theca^in the case of the males of the other Chouiostomatidre, permits 

 us to believe that they have attained their sexual maturity. In this 

 case therefore we should be confronted with an instance oi pro^/ent'sia 

 entirely comparable to that which is exhibited liy the Cryptoniscid 

 males of certain Epicaridie ; and the question may be mooted 

 whether, as in the case of certain of these latter, dissogomy might 

 not occur in the male sex of Salenskia, that is to say, whether, after 

 having performed their function in the larval form, these males, or at 

 least one among them, might not be capable of undergoing tho 

 regressive metamorphosis which has been proved to take place in the 

 case of the males of Aspidcpcia and SpJurroneUa Leuckarti. Perhaps, 

 too, these dwarf males are only complcmental males, such as are 

 known in several groups of parasitic Metazoa. The excretory ducts 

 of the spermathecae appeared to us to open in the neighbourhood 

 of the mouth, contrary to what occurs in Aspida'cia. 



