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Show 948 DR. H. J. HANSEN ON CRUSTACEANS [Dec. 1, (p. 217), must be mentioned; for in the final report, 1895, he withdraws it " as large and mature individuals of S. edwardsil," redescribing and figuring one of the three type specimens as this species (p. 212, pl. Ii. figs. 1-1 e). But his representation shows that S. holla, Fax., must be maintained as valid, as the exterior margin of the ext. br. of urp. is naked in almost \ of its length, while iu S. edwardsl, Kr., it is hairy in the total length ; furthermore, the rostrum, besides being somewhat differently shaped, is considerably shorter in the last-named species than in S. halla, Fax., a feature also observed by Faxon (p. 214). W h e n he writes (p. 214):-"Kroyer notes a 'rare variety' of S. edwardsl, distinguished by a larger rostrum," I may remark that a preserved specimen of this variety belongs to another species, S. penerinki, Bate, H . J. H . As to this last name and some other names in the following chapter I must say a few words. W h e n an author in the same work has described an adult species and . i s Mastigopus as two species, the species, of course, retains the name of tbe adult. But in some instances only the Mastigopus has been described, while I also possess and briefly describe ""he black-eyed or even the mature form. In order to avoid new names I, in these cases, have used the name of the Mastigopus for the adult Sergestes, thinking that a double series of names, one for one of the not few Masti-gopus- stages, and another for the adult species itself, cannot be maintained, as the Mastigopus and the Sergestes - in strong contradistinction to the relation between the Squillidce and their larvae-are connected with even transition. To avoid misapprehension I, in these cases, have placed m y own name (H. J. II.) after the name of tbe author who has established the Mastigopus. It will, I fear, in the future also be necessary to adopt the oldest name for a species when its Mastigopus has been described before the adult. v. Conspectus of the Species. In the following tabular view (and added notes) all established species are enumerated, and besides two new species are named and later on described. The tabular view is worked out with reference to the adults and the Mastlgopus-stages, with the exception of the youngest Mastlgopus-stage (in several instances= Mastigopus, auct.), which sometimes differs very much from the somewhat older stages. W h e n the black-eyed form of a species has been described elsewhere or will be mentioned in m y later notes, the name in the tabular view is printed with interspaced letters; if the really mature form is known I further mark the name with an asterisk. W h e n the same stage, in most instances the adult one, has been described under various names, they are given as synonyms following the oldest name, but the different stages of a species are connected with a {. . By this, perhaps somewhat artificial, mode of proceeding it will, I hope, be easy to form a notion of the species. |
