380 PERCY SLADEN TRUST EXPEDITION 



Harpilius Beaupresii, Heller, Sitz. k. Ak. Wiss. Wien, xliv. i. p. 280 (1861). 

 Paulson, Crust. Red Sea, p. 113 (1875). de Man, Arch. Naturg. liii. i. p. 539 (1887). 

 Borradaile, Ann. Mag. Nat. Hist. (7), ii. p. 386 (1898). Nobili, Ann. Mus. Univ. Napoli, 

 i. III. p. 3 (1904) ; Ann. Sci. Nat. (9), iv. p. 63 (1906). 



? Pontonia {Harpilius) dentata, Richters, Decap. Mauritius, p. 165, PI. 17, figs. 36 

 —38 (1880). 



Red Sea. E. Indies. Indian Ocean. 



2. Harpiliopsis depressus (Stimpson), 1860 (Plate 56, fig. 22). 



Harpilius depressus, Stimpson, Proc. Ac. Philadelphia, 1880, p. 38. Rathbun, BuU. 

 U. S. Fish Comm. xxiii. III. p. 920, fig. 68 (1903). 



Anchistia spinigera, Ortmann, Speng. Zool. Jahrb. Syst. v. p. 511, PL 36, fig. 23 

 (1890). Lenz, lb. xiv. p. 434 (1901). 



Periclimenes spinigerus, Borradaile, Ann. Mag. Nat. Hist. (7), ii. p. 383 (1898) ; 

 Willey's Zool. Results, iv. p. 405 (1899). 



The fixed finger of the great chela in this species varies in shape. Sometimes it has 

 three teeth, of which the most distal is broader than the others. Sometimes this tooth 

 loses its point and becomes a blade-like flange. 



Indopacific, in corals. 



Genus Harpilius Dana, 1852. 



U. S. Explor. Exped. Crust, i. p. 575. Kingsley, Proc. Ac. Philadelphia, 1879, p. 423 

 (1880). Borradaile, Ann. Mag. Nat. Hist. (7), ii. p. 386 (1898). 



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

 of good length, toothed above and below, sharp ended ; outer flagellum of antennule not 

 deeply cleft ; antenna] scale of good breadth ; mandible without palp ; second maxilliped 

 without podobranch, with last joint posterior to preceding joint ; third maxilliped without 

 arthi-obranch, and with last two joints narrow, together longer than preceding joint, 

 which is broad ; legs stout, the last three with hooked dactylopodites. 



Key to the species of Harpilius* : 



I. No hepatic spine. Second leg unarmed. 



H. gerlachei Nobili, 1905. 



II. A hepatic spine. Second leg bears one or more spines. 



A. Fingers of second leg curved inwards. Inner edge of hand concave. 



H. consohrinus de Man, 1902. 



B. Fingers of second leg not curved inwards. Inner edge of hand almost straight. 



H. lutescens Dana, 1852. 



* The limits of this genus are doubtful. In most respects its charactei's are similar to those of the 

 species on which I have founded Harpiliopsis, but the second maxilliped of the type of Harpilius is so 

 remarkable that no species which does not share this peculiarity can be retained in the genus. The other 

 species here included in Harpilius are so placed provisionally, until further information as to their second 

 maxilliped is available. Sollaud states that the third maxilliped in this genus has no arthrobranch, but 

 does not state what species he has seen. 



