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

;CEUSTACEA. 211dactyl, where there are a few hairs), acute at their apices, and denticulatedou the inner margins only at base, the margins (in theirdistal half) thin-edged and entire. Ambulatory legs of moderatelength and rather compressed ; the dactyli very short. Colour (inspirit) purplish or fuscous brown. Length a little over 5 lines(11 millim.), breadth nearly 8 lines (1G| miUim.).Two specimens (males) were obtained on the beach at PortDarwin (No. 176).The absence of any distinct lobation of the carapace or of distinctantero-lateral marginal teeth is very characteristic of this species,which is also distinguished by its quadrilobate front. (See fig. c.)I at first referred this species to the genus Actcea, not havingobserved the notches in the front of the endostome*, which in oneBpecimeu are nearly obliterated. In a specimen sent by Mr.Haswell from Port Denison, which in its narrower carapace connectsthis species with Atergatopsls, these notches are deep and welldefined.In two specimens in the Museum collection which I referto the typical Banareia annata, A. M.-Edwards (since they agreewith that species in all particulars except in the notches of theendostome), they are nearly obliterated.The genus Banareia apparently connects the genera Actcea andAtergatopsls, and will have, perhaps, to be united with the latter,with which it agrees in the some^yhat broader basal antennal jointand narrow naked acute finger-tips.42. Xantho macgillivrayi. (Plate XX. fig. C.)Carapace transverse, of the form usual in this genus, with thecervical suture and the depressions separating the prominences ofthe postfrontal, gastric, hepatic, and branchial regions very distinctthose lobules are themselves granulated, the granules being for themost part disposed in short transverse raised lines or low ridges,which are most prominent on the anterior part of the carapace ; theintestinal region is plane and more or less punctulated. The frontis rather prominent, and (in an adult examj^le) more than one fourththe greatest width of the carapace, and is divided by a very slightmedian notch into two truncated lobes, exterior to which on eachside is a small and less prominent tooth, formed b}^ the inner andupper angle of the orbit ; the antero-lateral margins are armed withfour rather small but acute and well-defined teeth, which increaseregularly in size from the first to the last ; the subhepatic and pterygostomianregions and the postero-lateral margins of the carapaceare granulated. There is a small tooth at the outer and anotherat the inner suborbital angle. The male postabdomen is o-jointed,the third to fifth segments coalescent ; that of the female is 7-jointcd.The eye-peduncles are small, and thickened at their bases. Thebasal antennal joints are in contact with the subfrontal lobes. Theouter maxillipedes present nothing remarkable, having the ischium-* Annales de la Soc. Entoui. cTe France, 6cr. 4, ix. p. 168, pi. viii. (18G9).p2