TO INDIAN CAECIXOLOGY. 419 



216. Diogenes rectimanus, Miers. 



D. rectimanus, ]\Iicrs, 'Alert' Crust, p. 3n2, \)\. xxvii. fig. C (1881). 



Madras, common ; a large series {J. B. H.). 



The ophthalmic process is narrow and entire, not exceeding the ophthalmic scales ; 

 the latter are rounded, and with few marginal spinules. The antennal acicle is undivided, 

 with the inner margin S2:)inulose. The lower margin of the left hand is straight and 

 spinose ; the outer surface of this joint is flattened and slightly pubescent, Avith a few 

 spinules chiefly arranged along an oblique line near the upper margin, which is itself 

 dentate ; the fingers are very short, and tlie lower border of the iumiobile one is in a 

 straight line with the lower border of the hand. 



The average length is al^out 25 mm. 



Bistrihiition. Prince of Wales Channel, N. Australia; 7 fathoms (Jliers). 



Genus Pagukus, Tabricius. 



217. Pagurus puncttjlatus, Olivier. 



P. punctulatus (Oliv.), Milne-Edwards, Hist. Nat. Crust, t. ii. p. 222 (1837) ; Dana, Crust. U.S. 

 Explor. Expcd. pt. i. p. 451, pi. xxviii. fig. 4 (1852). 



Tuticorin {Thurston) ; common on the reef at Ptamcswaram {J. E. II.). 



This common species reaches a considerable size. The eye-stalks, even in spirit 

 specimens, arc of a \ery deep red colour, and the cornese are defined by a white line. 



The Cancer megistos figured by Herbst is undoubtedly a representation of the present 

 species, but the draughtsman has supplied it with an altogether fanciful abdomen. 



iJislribnlion. Prom tlie Picd Sea and E. Africa to China, Australia, and the Pacific. 



218. Paoukus Hessii, Miers. 



P. Ilcssii, Miers, 'Alert' Crust, p. 20]., pi. xxviii. fig. A (1884). 



P. similimanus, Henderson, 'Challenger' Anomura, p. 59, pi. vi. fig. 6 (1888). 



Gulf of Martaban, two specimens (Oates); Madras, not uncommon {J. H. U.). 



This species, in regard to its chelipedes, has the general appearance of a CUbanarius, but 

 its cephalic region is that of a true Pagurus. The colour-markings are characteristic, 

 the bands being red, especially on the under surface, while the under surface of the 

 propodus of the first and second ambulatory legs, and the sides of the cyc-stalks, are 

 banded with reddish brown. The figure in the ' Alert ' Crustacea somewhat exaggerates 

 the size of tlie eyes, and Miers states that the antennular peduncles scarcely reach the 

 end of the eye-stalks, whereas they slightly exceed these, and this arrangement is shown 

 in bis figure. I have re-examined my type of P. similimanus, and find it identical Avith 

 that of J*. Hessii. 



The largest specimen, a male, is G.j mm. long, the right chelipede 50 mm., and the 

 eye-stalks 10 mm. long. 



BistribiUion. Arafura Sea {Miers) ; Celebes Sea {Henderson). 



