OCR Text |
Show 532 REV. T. R. R. STEBBING O N CRUSTACEANS [May 22, White's Petalocerus being a synonym of Phyllolithodes. To these Bouvier in 1896 adds Paralithodes Brandt, and Neolithodes M.Edwards and Bouvier, as constituting together the other division of the Lithodinea, Brandt's Ostracogastrica. De Haan's Lithodes histrix, referred by Ortmann to Paralomis, is by Bouvier, in agreement with Stimpson, made the type of Acantholithus. The Lepto-lithodes and Pristopus of Benedict, 1894, are regarded as synonyms of White's Paralomis, to which eight species are assigned-aculeata and formosa of Henderson, longipes and aspera of Faxon, multi-spina and papillata from Benedict's Leptolithodes, verrilli from his Pi'istopus, and Dana's verrucosa, of which Jacquinot's granulosa is accepted as a synonym. As characters common to all the Ostracogastrica, Bouvier gives " Lateral pieces of the pleon absolutely entire. Acicle spinulose or spinose, rarely laminar, simple, sometimes rudimentary." Parce-lomis he describes as agreeing with Acantholithus and Rhinolithodes in having "The habitus of Lithodes.-Carapace longitudinally oval, cordiform or triangular, very rarely a little broader than long, and not extending roof-like over base of walking-legs. Antepenultimate joint of first feet is very rarely provided with a salient internal crest, has no respiratory channel, and does not serve specially to protect the oral appendages. Median pieces of the pleon separated by a row of nodules more or less coalesced." Paralomis, in common with Rhinolithodes, has the "acicle rather triangular, and ornamented with some spines, especially on its outer margin." From Rhinolithodes and Acantholithus, it is distinguished by the following characters : -" The marginal pieces of the third pleon-segment are fused with the corresponding lateral piece. Eostrum devoid of dorsal projection, but sometimes furnished below with a spinule or a tubercle." PARALOMIS GRANULOSA (Jacquinot). 1843-1847 l. Lithodes granulosa, Jacquinot, Voy. au Pole Sud Atlas, Crustaces, pi. 8. figs. 15-21. 1852. Lithodes verrucosa, Dana, U.S. Expl. Exp. vol. xiii Crust pt. i. p. 428, pi. 26. fig. 16. 1853. Lithodes granulata, Lucas, Voy. au Pole Sud, Zoologie, vol. iii. Crustaces, p. 94. 1856. Paralomis granulosa, White, Pr. Zool. Soc. Lond vol xxiv p. 134. ' ' 1858. Paralomis granulosus, Stimpson, Pr. Ac. Philad. p. 231 (Prodromus, p. 69). 1858. Paralomis verrucosus, Stimpson, loc. cit. 1871. Lithodes verrucosa (? L. granulosa), Cunningham, Tr. Linn. Soc. Lond. vol. xxvii. p. 494. 1881. Paralomis verrucosus, Miers, Pr. Zool. Soc. Lond. p. 71. 1881. Paralomis granulosus, Miers, loc. cit. p. 72. 1 See footnote on Peltarion, p. 519. |