ARTHROPOD rAUJS"A OF THE WEST INDIES. 387 



and Mr. Peckliam. "We have no specimens, however, from any 

 other West-IndiaQ island. 



There has been much unnecessary di£Bculty about the identity 

 o£ this form, partly owing to confusion between it and the pre- 

 ceding species, C. gracilis. The two are in reality very easy to 

 distinguish by the eye ; but I believe the credit of first setting 

 down their differential characters in tabular form belongs 

 to Prof. Kraepelin. Strangely enough, however, this author 

 seems to me to have gone hopelessly wrong about the names of 

 the two ; for he regards EdivarcUii of Gervais as a synonym of 

 gracilis (Latr.) (hiaculeatus, Luc), and what I have called mar- 

 garitatus he terms De Geerii. But it seems clear to me that 

 De Geerii is the same species as Edioardsii, although a dif- 

 ferent sex, and that both are synonymous with margaritatus. I 

 strongly suspect that Prof. Kraepelia's mistakes are attributable 

 to his ignorance of Grervais's original figures of Edwardsii, mar- 

 garitatus, and hiaculeatus. That Dr. Thorell failed to identify 

 margaritatus is probably because G-ervai&'s figure indicates that 

 the crests upon the hands are granular. But this is probably 

 pure imagination on the part of the artist, for the description 

 merely says " dessus de la main cotele^'' Moreover, if margari- 

 tatus is to be excluded on account of its figure, so also must 

 Edwardsii ; for the artist has made the same exaggeration in the 

 figure of the last-named species. Prof. Kraepelin, it seems likely, 

 has been thrown off the scent with regard to margaritatus through 

 not consulting Grervais's original description ; for it is there 

 asserted that the locality for the species is the Isle of Puna in 

 the Grulf or Eiver of Guayaquil, exactly one of the spots where the 

 species might be expected to occur *. Gervais's statement in the 

 ' Ins. Apt.' vol. iii., that the Island of Puna is in the Straits of 

 Malacca is of course a mistake. 



This species maybe recognized from C. gracilis by being more 

 coarsely granular, by having wider, more strongly crested hands, 

 with shorter digits and fewer rows of teeth upon them. More- 

 over, as a very general, although not invariable, rule, the hands 

 are darker than the rest of the palpi, and the digits are largely 

 flavous, as also are the legs and the intercarinal spaces of tiie 

 tail. In gracilis usually the hands are paler than the rest of 

 the palpi, the digits fuscous, the whole animal being of a darker 

 tint than C. viargaritatus. 



* I have seen examples of this species from Guajaquil, whence they were 

 brought by Mr. Edward Whymper. 



