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I. CoENOBiTA CLYPEATUs, Latr. Plate XV., fig. i, la. 



Coenobita clypeata, Latreille, Fam. Nat. Rfegne Anim , 1826, p. 277, and Cuvier, Regne 

 Anim. (2) IV., 1829, p. 77 : Milne Edwards, Hist. Nat. Crust., II., 1837, p. 239: Dana, U. S. 

 Expl. Exp., Crust., pt., I., 1852, p. 473, pi. xx.t., fig. 4 : Heller, Novara Crust., 1865, p. 82: 

 Hilgendorf in v. d. Decken's Reisen in Ost-Afr., 111. i. 1869, p. 98, pi. vi., fig. 3c, 4c : Richters 

 in Mobius, Meeresf. Maurit., 1880, p. 161: Miers, Ann. Mag. Nat. Hist. (5) V., 1880, p. 371: 

 de Man, Arch. f. Nat., LIII. i. 1887, p. 452, and Abh. Senckenb. Nat. Ges., XXV., 1902, p. 741, 

 pi. sxiv., fig. 44 : Henderson, Challenger Anomura, 1888, p. 51 : Bouvier, Bull, Soc. Philom. 

 Paris (8) 11., 1889-90, p. 143: Ortmann, Zool. Jahrb., Syst., VI., 1892, p. 316, pi. .^ii. fig. 20: 

 Whitelegge, Mem. Austral. Mus , 111., 1897, p. 140: Borradaile, P. Z. S., 1898, p. 459; and 

 Stomatop. & Macr. Willey's Exp., 1899, p. 425 ; and Faun. & Geogr. Maldive and Lace. 

 Arch., l.i. 1901, pp. 68, 97 : Nobili, Ann. Mus. Genov. (2) XX., 1900, p. 494. 



There is no confusion about this well characterized species, e.Kcept as 

 regards the name, which, as Hilgendorf has pointed out, is hkely to be 

 challenged by zoological lawyers. 



Carapace punctate, most profusely so in the anterior part which is dor- 

 sally strongly convex. 



Though their ventral edge is sharp, the eyestalks appear subcylindrical ; 

 they only shghtly surpass the penultimate joint of the antennal peduncle. 

 Ophthalmic scales laminar, their free edge serrulate or crenulate. 



The antennular peduncles are more than one-fifth longer than the cara- 

 pace, their basal joint is almost as long as the entire antennal peduncle. 

 Antennal acicle compressed, almost lanceolate, not fused with the 2nd joint 

 of the peduncle. 



In the chelipeds the meri are transversely more or less rugulose, and 

 the carpi are studded irregularly with small pustular tubercles— becoming 

 almost spiniform near the inner edge— the tips of which are corneous and 

 dark-coloured : similar pustular or vesicular tubercles stud the hands and 

 fingerS; but on the outer surface of the large (left) hand and dactylus the 

 horny tips are worn or absent. Along the upper part of the inner surface 

 of the right palm only there is a thick brush or mat of long coarse hairs. 



The 2nd and 3rd legs do not, or hardly, surpass the larger cheliped : in 

 the last four joints the outer surface is more or less rugulose and punctate, 

 and in the last three joints the anterior surface is more or less beset with 

 small, dark-corneous-tipped subspiniform tubercles, which are most numerous 

 on the dactyli : the lower edges of the legs, especially of those of the right 

 side, are somewhat setose. On the concave inner surface of the dactyli of 

 the left legs there is a fine linear, corneous-serrate ridge, although there is no 

 special stridulating mechanism on the left cheliped. 



In the male the coxje of the 5th pair of legs are equally salient ventrally, 

 but are not more prominent than they are in the female. 



Colours in spirit : dusky violet or livid purple. 



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