636 COIlECIIOlfS FKOM THE WESTEKN INDIAN OCEAN. 



which it may he distinguished from T. ferruginea, Latreille, i. e. by 

 the more acute lateral spines of the carapace, and the subcristate and 

 hairy palms of the chelipedes, and these characters are remarkably 

 constant in adult examples ; but young and half-grown specimens 

 can scarcely be distinguished except by the subcristate hands. Since 

 the publication of. that paper, a specimen has been added to the 

 Museum collection from Amboina {Dr. P. Bleeker). 



40. Trapezia ferruginea, Latreille. 



A few specimens are in the collection from the Seychelles, 4-12 

 fms. (No. 194). 



Since 1878 specimens from Ceylon, GaUe (Dr. W. Ondaatje), and 

 Honolulu (found among fishes of the collection of H.M.S. ' Chal- 

 lenger ') have been added to the Museum collection. 



41. Trapezia rnfopunctata (Herlst). 



Etoile Island, 13 fms. (No. 191), ten specimens of varying ages 

 and both sexes ; Glorioso Islands, 7-10 fms. (No. 219), an adult 

 male. 



Specimens are in the British-Museum collection from the Mau 

 ritius ; Madagascar, Tamatave {Rev. Deans Cowan) ; Rodriguez {H. 

 Slater); Ked Sea {Col. J. Burton); El Tor {Major MacDonald); 

 Daedalus Shoal {Lt.-Col. Play fair) ; Gulf of Suez {B. MacAndrew) ; 

 and Ceylon {E. W. H. Holdsworth). It is distributed, as I have 

 already noted, throughout the Oriental Region. 



This species, as has been repeatedly observed, varies much in the 

 size and degree of acuteness of the frontal teeth, and in the size and 

 number of the red spots with which the body is covered. The • 

 specimens from Etoile Island are mostly of the variety designated 

 by Dana T. maculata of MacLeay *, for which Riippell's name 

 T. guttata is an earlier and safer appellation t, characterized by th^e 

 less prominent and acute frontal lobes and smaller spots on the body 

 and legs. The latter is not a character dependent upon the age of 

 the individual, since in the smallest example from EtoUe, length of 

 carapace only 2| lines (5 mUlim.), the spots are as large as in the 

 adult and large example from the Glorioso group. Another speci- 

 men from Etoile exhibits an intermediate condition in its markings 

 since several small spots are intermingled with the larger ones. 



Dr. J. G. de Man, in the first of his papers on Crustacea collected 

 by M. J. A. Kruyt in the Red Sea near Djeddah J, regards T. rufo- 

 jcnmctata and T. guttata as distinct species (*. c. ii. p. 176) §. 



* In Smith's Zool. S. Africa, Annulosa, p. 67 (1849). 



t Besohreib. 24 kurzsehwanzigen Krabben des rotheu Meeres, pr27 (1830) 



J Vide ' Notes from the Leyden Museum,' toI. ii. p. 171 (1880), and iii n <iq 

 (1881). "^ "^ 



§ I subjoin here a description of a mutilated Crustacean from Providence 

 Isiand, 19 fms. (No. 217), which I cannot certainly identify with any genus or 

 species with which I am acquainted. As it is a female and wants the cheli- 



