o88 Mr. L. A. Borradaile — A Revision 



Genus PONTONIA, Latreille, 1829. 



Pontonin, Latreille, Ciivier's R. An. 2ud ed. iv. p. 96 (1820) ; Roux, 

 Mem. sur les Salicoques, p. 26 (1831) ; H. 31.-Edwards, H. N. Crast. 

 ii. p. 358 (1837) ; De Haan, Faun. Jap. p. 17o (1850j ; Dana, U.S. 

 Expl. Exped., Crust, i. p. 570 (18o2); Kingslev, Proc. Ac N. Sci. 

 Philad. 1879, p. 422 (1880) ; Joliet, Arch. zool. exper. x. p. 119 

 (1882) ; Carus, Prodr. Faun. Medit. i. p. 475 vl885). 



PontoniidfB with body depressed ; rostrum sliort, depressed, 

 bent downwards, not dentate, with or without a keel below at 

 the free end ; both flagella ot' first antenna short, thicker of 

 two bifid ; scale of second antenna of moderate lengtli only, 

 broad ; flagellum of same not short ; second niaxilliped with 

 penultimate joint broader than last joint and bearing it 

 terminally; third niaxilliped with last two joints narrow, 

 together shorter than the preceding joint, which is broad ; 

 dactyles of last three legs straight, simple or with small 

 teeth on the underside, without basal protuberance ; one of 

 the second pair of legs with very large chela. 



1. Pontonia custos (Forskal), 1775. (Type.) 



Cancer custos, Forskal, Descrip. anira. p. 94 (1775). 



Astacus tyrrhenus, Petagua, Ent. pi. v. fig. o [fide Risso]. 



GnatliophijUum tyrrhenus, Desmarest, Consid. sur les Crust, p. 229. 



Alpheus jjinnophylax, Otto, Mem. Ac. cur. nat. Bonn, xiv. pi. xxi. 

 tig. 2. 



Pontonia ti/rrhetia, Latreille, Encycl. pi. cccxxvi. fig. 10 ; id. Cuvier's 

 R. An.*2iid ed. p. 96 (1829); H. M.-Ed wards, Crust, ii. p. 360 

 (1837) ; id. Atlas Crust, in Cuvier's R. An. pi. Hi. fig, 4 ; Heller, 

 Crust. sUdl. Eur. p. 251, pi. viii. figs. 10, 11 (1863) ; Ortmann, Zool. 

 Jahrb. v., Syst. p. 509, pi. xxvii. figs. d-{ (1891). 



Callianassa ihyrrhenus, Risso, Hist. Nat. Eur. Mer. p. 54 (1826). 



Pontonia custos, Guerin, Exped. Mor^e, Zool. p. 'M, pi. xxxvii. fig. 1 ; 

 Carus, Prodr. Faun. Medit. p. 475 (1885). 



{?) Pontonia parasitica, Roux, M^m. sur les Salicoques, p. 26 (1831). 



Mediterranean. 



2. Pojitonia nii^poneasis De Haan, 18 "JO. 



Pontonia nipponcnsis, De Ilaan, Faun. Japon., Crust, p. 180 (1850). 

 Rymenocera nipponensis, De Haan, loc. cit. pi. xlvi. fig. 8 (1850). 



Japan. 



3. Pontonia flnvomacidafa Heller, 1864. 



Pontonia favomaculata, Heller, Verb, zool.-bot. Ges. AVien, xiv. p. 51 

 (1864); Carus, Prodr. Faun. Medit. i. p. 475 (1885); Ortmann, 

 Zool. Jabrb. v., Syst. p. 509 (1891). 



Pontonia diazonce, Joliet, Arch. zool. exper. x. p. 101 (1882). 



Ponto7iia p/iaUusice,'Ma,vion, Ann. Mus. N. H. Marseille, Zool. i. (1883) ; 

 Gourret, Compt. Rend. civ. p. 187 (1887). 



Mediterranean. 



