532 RET. T. R. E. STEBBING ON CRUSTACEANS [May 22, 



White's Petalocerus being a synonym of Phylloliihodes. 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 Liihodes 

 histrix, referred by Ortmann to Paralomis, is by Bouvier, in agree- 

 ment 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 — amleata 

 and formosa of Henderson, longipes and aspera of Faxon, multi- 

 spina and papillata from Benedict's Leptolithodes, verrilli from his 

 Pristopus, 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." Para- 

 lomis he describes as agreeing with Acantholithus and Rhinolithodes 

 in having "The habitus of Liihodes. — Carapace longitudinally oval, 

 cordiform or triangular, very rarely a little broader than long, and 

 not extending roof-like over base of walking-legs. Antepenul- 

 timate 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 distin- 

 guished by the following characters : — " The marginal pieces of the 

 third pleon-segment are fused with the corresponding lateral piece. 

 Bostrum 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. Liihodes gramdata, Lucas, Voy. au Pole Sud, Zoologie, 

 vol. iii. Crustaces, p. 94. 



1856. Paralomis granidosa, "White, Pr. Zool. Soc. Lond. vol. xxiv. 

 p. 134. 



1858. Paralomis granidosus, 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. 



