BORRADAILE— ON THE PONTONIIN^ 369 



(2) Antennal scale narrow, outcurved, its distal spine projecting 

 beyond its end. Rostrum outreaching antennular stalk. 



(a) Antennal scale shorter than carapace. Last two joints of 

 antennular stalk slender. [R. = ^^. ] 

 P. (F.) suvadivensis Borradaile, 1915. 



(&) Antennal scale longer than carapace. Last two joints of 

 antennular stalk stout. [R-=f-] 

 P. {F.) pottsi Borradaile, 1915. 



2. Upper edge of rostrum decidedly concave from base. 



a. Rostrum deep, ^-. Second leg unarmed. 



P. (F.) seychellensis Borradaile, 1915. 



b. Rostrum slender, i^-. Second leg bears spines on arm and wrist. 



i. Rostrum not more than If times length of carapace. Second legs 

 not more than five times length of carapace. 

 P. (F.) borradailei Rathbun, 1904. 



ii. Rostrum 2^ times length of carapace. Second legs seven times length 

 of carapace. 



P. {F.) kolumadulensis Borradaile, 1915. 



1. (Type). Periclimenes (Falciger) spiniferus de Man, 1902 (Plate 52, fig. l). 



Anchistia incBquimana, Heller, " Novara " Rep., Zool. ii. iii. p. 109 (1865). 



Anchistia Petitthouarsii, de Man, Arch. Naturg. liii. i. p. 54 (1887). 



Periclimenes petitthouarsii var. spinifera, de Man, Abh. Senckenb. Ges. xxv. in. 

 p. 824 (1902). 



Periclimenes Petitthouarsii var. spinigera, Nobili, Ann. Sci. Nat. Zool. (9), iv. p. 49 

 (1906). 



Periclimenes Petitthouarsi var. spinifera, Lenz, Voeltzkow's Reise in Ostafrika, ii. 

 p. 567 (1910). 



Tahiti. E. Indies. Indian Ocean. 



2. Periclimenes (Falciger) petitthouarsi (Audouin), 1825. 



Paloemon Petitthouarsii, Audouin, Descr. Egypte, Hist. Nat. i. iv. p. 91 (1825). 

 Savigny, Atlas, Crust, pi. 10, fig. 3. 



Anchistia incequimana, Heller, Sitz. k. Ak. Wiss. Wien, xliv. i. p. 283 (1861). 



Anchistia Petitthouarsii, Kossmann, Ergebn. Reise Rot. Meeres, p. 83 (1880). 



Periclimenes Petitthouarsi, Borradaile, Ann. Mag. Nat. Hist. (7), ii. p. 381 (1898). 

 Nobili, Ann. Mus. Univ. NapoK, i. iii. p. 6 (1901); Bull. Sci. Fr. Belg. xl. p. 41 

 (1906). Lenz, Ark. Zool. vii. xxix. p. 2 (1912). 



Periclimenes petitthouarsii, typischen art, de Man, Abh. Senckenb. Ges. xxv. iii. 

 p. 824 (1902). 



SECOND SERIES— ZOOLOGY, VOL. XVII. 47 



