BORRADAILE— ON THE PONTONIIN^ 381 



1. (Type.) Harpilius lutescens Dana, 1852. 



U. S. Explor. Exped. Rep. xiii. i. p. 576 ; Atlas, PL 38, fig. 4 (1855). Borradaile, 

 Ann. Mag. Nat. Hist. (7), ii. p. 386 (1898). Nobili, Ann. Mus. Napoli, i. m. p. 3 (1901) ; 

 Ann. Sci. Nat. Zool. (9), iv. p. 63 (1906). 



Tongatabu, Red Sea. 



2. Harpilius consobrinus de Man, 1902. 



Harpilius lutescens, de Man, Arch. Naturg. liii. i. p. 536, PL 22 a, fig. 1 (1887). 

 Harpilius consobrinus, de Man, Abh. Senckenb. Ges. xxv. iii. p. 836, PL 26, fig. 54 

 (1902). 



E. Indies. 



3. Harpilius gerlachei Nobili, 1905. 



Bull. Mus. Paris, 1905, iii. p. 160 ; Bull. ScL Fr. Belg. xl. p. 45, PL 4, fig. 10 (1906). 

 Persian Gulf, " parmi les polypiers." 



Genus CoRALLiocARis Stimpson, 1860. 



(Edipus, Dana, U. S. Explor. Exped. Rep. xiii. i. p. 572 (1852). 



Coralliocaris, Stimpson, Proc. Ac. Philadelphia, 1860, p. 38. Kingsley, lb. 1879, 

 p. 423 (1880). Borradaile, Ann. Mag. Nat. Hist. (7), iL p. 384 (1898). Ortmann, 

 Bronn's Thierreich, Arthropoden, v. ii. p. 1131. Rathbun, Bull. U. S. Fish Comm. xx. ii. 

 p. 122 (1901). 



Definition : Body stout, depressed ; sixth abdominal segment not elongate ; rostrum 

 of moderate or good length, with or without teeth, usually somewhat depressed, shallow, 

 not curved downwards ; outer flagellum of antennule not deeply cleft ; antennal scale 

 broad ; mandible without palp ; second maxilliped without podobi-anch, with last joint 

 mediad of preceding joint, but often projecting far behind it ; third maxilliped with 

 arthrobranch and with last two joints usually broad, antepenultimate joint more or less 

 broadened, not contrasting sharply in width with last two joints ; legs stout, directed 

 outwards, one or both of second pair with large chela, swollen at base and very short- 

 fingered, the last three pairs with hooked dactylopodites and a basal protuberance, which 

 is usually large. 



Key to the subgenera of Coralliocaris: 



I. Dactylopodites of walking legs with an accessory spine and small basal 



protuberance. 



Onycocaris Nobili, 1904. 



II. Dactylopodites of walking legs without accessory spine, and with basal protu- 

 berance of a good size. 



Coralliocaris s. str. 



