Report on the zoological collections made in the Indo-Pacific Ocean ...

530 COLLECTIONS FROir THE WESTERN INDIAN OCEAN.23. ActaBodes tomentosus (M.-Echu.).Darros Island, beach, an adult female (No. 200).Specimens of this very common Oriental species are in the British-Museum collection from the Mauritius {Lady F. Cole) ; liodriguez(Tmiviit-of- Venus Exped.) ; Seychelles {Dr. E. P. Wright); RedDuke of York Island {Rev.Sea, Daedalus Shoal {Lt.-Gol. Playfair) ;G. Brown); Sulu Islands {U.S. Exploring Exped.) ; Philippines{Cuming); Goto Islands {Capt. II. C. St. John); Port Essington,Minerva Eeef, and Fiji Islands {II. M.S. Herald ' ') ; Samoa Islands{Rev. S. J. Whitmee) ; and Sandwich Islands ( W. H. Pease).24. Leptodius exaratus {M.-Ediv.).A specimen from the beach at Darros Island (No. 200) and MahcIsland (No, 190) are referred to this species, and may perhaps bebest regarded as belonging to the variety sangidneus, M.-Edwards,which is said to be common at the Mauritius, although they havenot the additional tooth behind the last of the normal antero-lateralteeth which usually characterizes sanguineus. From the varietydesignated distinguendas by De Haan* they are scarcely distinguishable,except by their somewhat less convex and rugose carapace.I have referred to the uncertainty- of the specific distinctionsin this genus on p. 214.If, as Dr. Eichter surmises, the Xantho quinqnedentatns of Kraussis to be regarded as synonymous with this species. Natal must beadded to the recorded localities where L. exaratus occurs on theAfrican coast.25, Leptodius exaratus, var. gracilis {Dana).Mozambique, obtained between tide-marks (Nos. 225, 227), twomales ; Poivre Island, beach (No, 108), eight specimens, of bothsexes and different ages.In the typical condition of this form the carapace is depressed andnearly smooth in its median regions : there are four distinct anterolateralteeth (the one at the exterior orbital angle being usuallyobsolete) ; the first of the four is the smallest, with its apex obscurelydefined ; the three posterior are broad, triangulate, and very distinct.The chclipedes are nearly smooth, and have their fingers stronglyarcuated, the lower, and sometimes the upper, finger being stronglytoothed on its inner margin. On p, 214 I have referred to thelocalities whence the Museum possesses specimens of this variety,and to its apparent connexion with the typical L. exaratus ; neverthelessit is usually easily distinguishable by the characters mentionedabove,* Xantho diatingucndus, De Haan, Faim. Japon., Crust, p. 48, pi. xiii. fig. 7(18^5),