of the Pontoniidae. 389 



4. Pontonia unidens Kingsley, 183 ). 



Pontonia unidens, Kingsley, Proc. Ac. N. Sci. Philad. 1879, p. 422, 



pi. xiv. fig. 9 (1880). 

 (?) Pontonia mexicana, G-uenn, de la S.igra's Hist. Cuba (1856). 



West Indies. 



5. Pontonia brevirostris Miers, 1884. 



Pontonia brevirostris, Miers, 'Alert' Report, Crust, p. o(32. pi. li. fi» B 

 (1884). 



Seychelles. 



6. Pontonia pinnce Ortmann, 1894. 



niii 



East Africa. 



Pontonia pinnce, Ortmanu, Semon's ' Forschungsreisen in Austral.' 

 p. 16, pi. i. (1894). 



7. Pontonia ascidicola sp. n. 



A Pontonia with antennal scale barely reaching end of 

 peduncle of first antenna and with rostrum short, barely 

 reaching middle of antepenultimate joint of peduncle o( first 

 antenna, without keel below. 



Length 18 millim. 



[New Britain.] 



(?) Pontonia domestica Gibbes, 1851. 

 Bali am as. 



Pontonia domestica, Gibbes, P. Am. Assoc, iii. p. 190 (1851 ) ; Iuugsley, 

 Proc. Ac. X. Sci. Philad. 1878, p. 95. 



Genus COx\chodyt£S, Peters, 1851. 



Conchodytes, Peters, Ges. naturf. Freunde Berlin, 1851 (fide Heller); 

 id. Ber. k. Ak. Wiss. Berlin, 1852, p. o'Jl ; Hilgendorf, Monatsber. 

 k. Ak. Wiss. Berlin, 1878, p. 835. 



Pontoniidte with body much depressed ; rostrum short, 

 depressed, bent downwards, without dentations, bearing a 

 keel below at the free end ; both flagella of the first antenna 

 very short, thicker of the two bifid ; scale of second antenna 

 short, broad ; flagellum of same short ; second maxilliped with 

 penultimate joint broader than last joint, which it bears 

 terminally ; third maxilliped with last two joints fairly 

 broad, together shorter than preceding joint, which is broad ; 

 dactyles of last three legs short, stout, curved, bearing on the 

 underside a hooked spine and a low basal protuberance. 



Ann. & Mag. N. Hist. Ser. 7. Vol. ii. 27 



