THE ANNALS 



AND 



MAGAZINE OF NATURAL HISTOEY. 



[SEVENTFI SKRIES.] 

 No. 87. MARCH 1905. 



XX.YU.— Natural History Notes from the R.I. M.S. 'Investi- 

 gator,' Capt. T. H. Heming, R.N. (retired), commanding. — 

 Series III., No. 6. An Account of the new and some of the 

 rarer Decapod Crustacea obtained during the Surveying 

 Seasons 1901-1904. By A. C. MacGilchrist, M.A., 

 ]\r.B., Cli.B.j Capt. I. M.S., Surgeon-Naturalist to the 

 Survey. 



DuRiXG the season 1901-1902 the R.I. M.S. 'Investigator' 

 was engaged in survej'ing parts of tlie Persian Gulf. Here 

 most of the trawling and dredging operations were in compa- 

 ratively shallow water, and a goodly collection of Brachyura 

 was obtained. During the following two seasons the 

 Tenasserim and Arakan coasts were being surveyed, and the 

 collections were obtained mostly by deep-sea trawling eti 

 roiite between Bombay and the survey-ground on the out- 

 ward and homeward journeys. 



Besides a short account of some of the rarer species and 

 varieties obtained, three new species of Macrura, two new 

 species of Anomura, together with one new genus and five 

 new species of Brachyura are here described. 



MACRURA. 

 Fam. Peneidsp. 

 Pexeus, Fabr. 

 Peneus fissurus, Spence Bate. 

 Peneusjissurus, Spence Bate, ' Challenger,' vol. xxiv. pt. i. 18S8, p. 2o3. 

 Tliis species is new to the Indian fauna. This year, strange 

 Ann. & Mag. N. Hist. Ser. 7. Vol. xv. 17 



