TO INDIAN CAECINOLOGT. ,'{57 



defined, and separated by somewhat deep smooth grooves ; smooth rounded tiiljereles 

 are everywhere present, as well as a few scattered tufts of hair, which are not seen in 

 the types. On the antero-latcral margin are four elevations, each composed of a collection 

 of tubercles; on the posterior margin is a continuous row of tuliercles, and iaimediately 

 in front of it a second row, which, h(j\vever, is interrupted in the middle. The chelipcdes 

 and ambulatory legs are tuberculate externally, and the latter are fringed Avith hairs. 

 The digits are black and both are granulated proximally ; the black colour occasionally 

 extends back for some distance on both the inner and outer surface of tiie liaud. The ■ 

 sternal region is granulated. 



The largest male is 1(5 mm. long and 23-") mm. broad; a female with ova is 11-5 mm. 

 long and 17 mm. broad. 



A specimen in the British Museum, taken by H.M.S. ' Challenger ' at Honolulu, has the 

 carapace slightly broader in proportion to its length, and the tubercles on its surface both 

 smaller and more numerous ; the ambulatory legs without hairs. It may perhaps rank 

 as a variety. ' 



Distribiifion. Mauritius {IVhite); Honolulu (Jliers). 



54. AcT^EA Peronii (Milne-Edw.), var. squamosa, n. 



A. pemtiii (Milne-Edw.), Miers, 'Challenger' Bracliyura, p. 122 (18«6). 



{ = Xciif/i'i SJ//IIOSUS, Hess). 



Muttuwartu Par, a female {Tliurnton). 



This specimen ditfers from the typical form in having the tubercles of the carapace 

 replaced by flattened, polished, scale-like elevations ; each scale is raised higher from the 

 carapace anteriorly than it is posteriorly, and the whole series presents a tiled or ground 

 appearance, as if the filing had been performed from behind forwards. The scales are 

 also present, though of smaller size, on the posterior part of the carapace, whereas in 

 the typical form this part is almost smooth. In the variety the ambulatory legs are 

 hairy and the merus of the last leg is strongh' tuberculate (smooth in the typical form) ; 

 the tubercles of the carpus and propodus oF the chelipcdes are more conical, and the 

 tubercles present on the eye-stalks and immediately below the suborbital margin are 

 more strongly developed. I cannot regard this specimen as belonging to a distinct species, 

 for I have observed a tendency towards tlic above characters in undoubted specimens of 

 A. Feronii; still it may be useful to di.stinguish it by a special name. 



The carapace measiu-es 0'5 mm. in length and 12 mm. in l)readtli. 



Distribution. Australia [3Iihte-Edwurds, Hess) ; Bass Strait {Miers}. 



55. ACT.KA IIDFOPUNCTATA (Miluc-Edw.j. 



j4. nifopunctata (Wilnc-Edw.), A. Miliu-Kdwards, Nouv. Arch. Mus. Hist. Nat. t. i. p. 2().S. 



pi. xviii fig-. 1 (1865). 



{ = A. iiilusd, Stinipson). 



Tuticorin ; Cheval Par (Thurston). 



In this species the lingers are almost excavated at the tips, so it might with equal 

 justice be placed in the genus Acta'odcs. 



SEC0N1> SEKIES. — ZOOLOGY, VOL. V. 52 



