390 ^ir. L. A. BorraJaile— J Revision 



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



Conchodytes tridacnce, Peters, Ges. natiirf. Freunde Berlin, 1851 (fide 

 Heller) ; Ber. k. Ak. Wiss. Berlin, 18"')2, p. 694 ; Hilgendorf, 

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



Pnntonia tridacnce, Dana, loc. cit. p. 571, pi. xxxvii. fiffs. \a-d (1852) ; 

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



Samoa; East Africa ; Red Sea. 



2. Conchodytes meleagrinoi Peters;, 1851. 



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



Hilgendorf, Monatsber. k. Ak. Wiss. Berlin, 1878, p. 8o6. 

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



figs. 1,2 (1888). 

 (?) Pontonia macidata, Stimpson, Proc. Ac. Nat. Sci. Philad. 1830, 



p. 38. 

 (p) Pontonia tridacnce, :\[iers, ' Alert ' Report, Crust, p. 290 (1S84). 

 (?) Pontonia enflee, fl. M.-Edvvards, H. N. Crast. ii. p. 360 (1837). 



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

 flict Group; Loyalty Islands ; Rotuma]. 



Genus Typtox, Costa, 1841. 



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

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



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



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



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

 Pontonella, Heller, Verb, zool.-bot. Yer. Wien, vi. p. 629 (1856). 



Pontoniidre 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. Eiu\ 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., Syst. p. 508, pi. xxxvii. fig. 8 (1S91). 

 Typton spongiosus, Bate, Ann. & Mag. Nat. Hist. (4) ii. p. 119 (1868). 



