2G0 Capt. A. C. MacGilchrist un Decapod Crustacea 



merus not entirely hidden beneath the carapace ; its outer 

 surface has transverse rows of pearly {granules and its upper 

 border is spiuulose in its distal part. Outer surface of 

 wrist and ])ahn furnished with pearly granules. The outer 

 surface of the wrist is irrcjjular, but generally shows a trans- 

 verse groove at the distal end and a prominent tooth at the 

 angle of the upper or inner border. The outer surface of 

 the palm shows three parallel longitudinal furrows^ as in 

 A^ Lamarckii, the pearly granules at the margins of the 

 furrows being arranged in rows. The inner surface of the 

 palm is smooth and ))olislicd. The fingers are pointed and 

 blackish brown in spirits. 



Upper margin of merus of ambulatory legs serrulate. 

 The upper border of the carpus is i)eculiar ; it is furnished 

 Avitli a central and a subdistal hump, which make it saddle- 

 shajjed. The upper border of the propodite is convex and, 

 like that of the carpus, finely granular. A fine longitu- 

 dinal granular ridge runs along the outer surface of carpus 

 and propodite. Dactylus is long and bristly and ends in a 

 short horny spine. 



Six females (four ovigerous) and one male were trawled 

 at Sta. 292, Persian Gulf, mud bottom, 53 fathoms. The 

 male, which is about the size of the largest female, gives 

 length of carapace 8, length of cheliped 12, and greatest 

 width 11'3 mm. 



This species will be figured in an early issue of '^ Illustra- 

 tions of the Zoology of K.I.M.S. * Investigator.' " 



AcTUMNUs, Dana. 

 Actumnus margurodes, sp. n. 



Carapace subcircular, with concave postero-lateral borders, 

 strongly areolated and moderately convex ; it is not much 

 broader than long. Fronto-orbital border is about two 

 thirds the greatest width of the carapace. The central lobes 

 of the front arc prominent, somewhat depressed, and the 

 central notch is shallow ; the outer angles of the front are 

 not large, are well marked off from the central lobes, but are 

 only marked off from the supraorbital angles by a shallow 

 groove. The antero-lateral border is cut into three teeth 

 exclusive of the outer orbital angle. 



The main arcohition on the anterior half of the carapace 

 is -U- sliaped, and is surmounted by a band (1-2 deep) of 

 sharp crystalline granules; the lateral arms are continued 

 outwards and backwards in a gentle curve towards the 

 third, or last tooth of the antero-lateral border. A short 



