390 Mr. L. A. Borradaile — A Revision 



1. Conchodytes tridacnce Peters, 1881. (Type.) 



Conchodytes tridacnce, Peters, Ges. naturf. Freunde Berlin, 1851 ('fide 

 Heller) ; Ber. k. Ak. Wiss. Berlin, 1852, p. 594 ; Hilgeiidorf, 

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



Pontonia tridacnce, Dana, loc. cit. p. 571, pi. xxxvii. fisrs. la-d (1852) ; 

 ? Ortmann, Zool. Jahrb. v., Syst. p. 509, pi. xxxvi. figs. 10 d-i (1891). 



Samoa; East Africa ; Red Sea. 



2. Conchodytes meleagrince Peters, 1851. 



Conchodytes meleagrince, Peters, Ber. k. Ak. Wiss. Berlin, 1852, p. 594 ; 



Hilgendorf, Monatsber. k. Ak. Wiss. Berlin, 1878, p. 836. 

 Pontonia meleagrince, Bate, ' Challenger' Macrura, p. 707, pi. cxxiv. 



figs. 1,2 (1888). 

 (?) Pontonia maculata, Stimpson, Proc. Ac. Nat. Sei. Philad. 18i30, 



p. 38. 

 (?) Pontonia tridacnce, Miers, ' Alert ' Report, Crust, p. 290 (1884). 

 (?) Pontonia enjlee, H. M.-Edwards, H. N. Crust, ii. p. 3(30 (1837). 



East Africa; Torres Straits ; [British New Guinea ; Con- 

 flict Group; Loyalty Islands ; Rotuma]. 



Genus Typton, Costa, 1841. 



Typton, Costa, Ann. Ac. deal. Aspir. Nat. Nap. ii. (1844) ; id. Faun. 



Regn. Nap. ii. 1 1 1846) ;" Heller, Crust, siidl. Eur. p. 254 (1863); 



Bate, Ann. & Mag. Nat. Hist. (4) ii. p. 119 (1868) ; Kingsley, Proc. 



Ac. N. Sci. Philad. 1879, p. 422 (1880) ; Costa, Prodr. Faun. Medit. 



i. p. 475 (1885) ; Ortmann, Zool. Jahrb. v., Syst. p. 508 (1891). 

 Puntonella, Heller, Verb, zool.-bot, Yer. Wien, vi. p. 029 (1856). 



Ponroniidse with rostrum small, compressed, bent upwards 

 at the free end, pointed towards the tip, not dentate; thicker 

 flagellum of first antenna short, not bifid; scale of second 

 antenna rudimentary ; second maxilliped with penultimate 

 joint somewhat broader than last joint, which it bears 

 terminally ; third maxilliped narrow, last two joints together 

 somewhat longer than preceding joint ; dactyles of last three 

 thoracic legs moderately straight and slender, with a small 

 tooth below, without basal protuberance; one of the second 

 pair of legs with very large chela. 



1. Typton spongicola Costa, 1844. (Type.) 



Typton spongicola, Costa, Ann. Ac. degl. Aspir. Nat. Nap. ii. (1844) ; 



id. Faun. Regn. Nap. ii. 1 (1846) ; Heller, Crust, siidl. Eur. p. 254 



(1863); Norman, Ann. & Mag. Nat. Hist. (4) ii. p. 176 (1868); 



Costa, Prodr. Faun. Med. i. p. 475 (1885); Ortmann, Zool. Jahrb. 



v., Syot. p. 508, pi. xxxvii. tig. 8 (1891). 

 Tyjton sponyiosus, Bate, Ann. <fc Mag. Nat. Hist. (4) ii. p. 119 (1868). 



