CBUSTACEA. •>•'/ 



of carapace, in the middle line, abont 6^ lines (1 t millim.) ; length of 

 larger (left) chelipede nearly 11 lines (23 millim.) ; of second (left ) 

 ambulatory leg 1 inch U line (l J "< millim.). 



Seychelles, 4-12 fins. (No. 194); an adult female. 



P. guttatus, Olivier, as described and figured, differs somewhat in 

 the spinulation of the chelipedes and two following legs and in the 

 coloration. 



In the form and spinulation of the larger chelipede it somewhat 

 resembles P. varijpes, Heller*; but that species is distinguished by 

 many important characters, as (e. g.) by the shorter eye-peduncles, 

 the existence of a strong tooth on the upper margin of the merus- 

 joint of the larger chelipede, and in the form and sculpture of the 

 left leg of the third pair (cf. Dr. Heller's figure, t.c. pi. ii. fig. 3). 



The type of P. guttatus was. from the Mauritius ; Lenz and 

 Richters record this species from Madagascar. 



Dana refers specimens from Upolu (which may, however, be 

 specifically distinct) to this species. 



8. Calcinus tibicen (Herbsf). 



Mozambique, between tide-marks (Xo. 225) : a female. 



A specimen from the same locality was presented to the British 

 Museum by the late Dr. Livingstone. Specimens are in the Museum 

 collection from Rodriguez (II. H. Slater) ; Madagascar, Tamatave 

 (Rev. D. Cowan) ; Keeling or Cocos Islands (Lieut. Burnaby) ; Pelew 

 Islands (Dr. G. L. King); and Sandwich Islands (W. H. Pease) ; 

 besides a series of specimens from the ' Herald ' collection without 

 locality. 



9. Petrolisthes lamarckii (Leach). 



Darros Island, beach (Xo. 200) : an adult male and female. 



These specimens present the distinctive characters of the species 

 referred to in the preceding part of this Eeport (p. 268). The body 

 (in spirit) is of a reddish colour, punchilated with yellow; the 

 carpus and penultimate joints of the first and second ambulatory 

 legs alternately banded with yellow and red. In some specimens 

 from Ceylon (Dr. W. Ondaatje) the yellowish colour predominates, 

 as in the following variety. 



10. Petrolisthes lamarckii, var. asiaticus, Leach. 



Of this variety, if it can be so styled, three specimens were col- 

 lected with the typical P. lamarckii at Darros Island. In these 

 specimens, and in almost all I have examined, except Leach's type, 

 from the Mauritius, a longitudinal purplish line exists on the upper 

 surface of the palms of the chelipedes, and the outer (or posterior) 

 margin of the palm and mobile finger is marked with a series of 



* Sitz. Akad. Wissensch. Berlin, xliv. (1) p. 244, pi. i. fig. 1 and pi. ii fia 3 

 2, 3 (1862). 



