36 ME. J. CARTEK ON THE PAL^ONTOLO&Y OE [Feb. 1898,- 



wider than long — in the proportion of 28 to 23 mm. Orbito-frontal 

 border half the width of the carapace. Antero-lateral border 

 moderately arcnate, trenchant, bearing four (or five ?) pointed pro- 

 cesses; two or three similar processes occur upon the postero- 

 lateral border. Posterior border as wide as the orbito-frontal.- 

 Rostrum large, longitudinally sulcated. Orbits of moderate size,- 

 with two slight notches in the upper edge. A wide, unusually 

 shallow, undulating cervical sulcus marks off the cephalic region,, 

 the area of which is rather larger than that of the scapular. Most of 

 the gastric lobes exist as nodular prominences, which are separated by 

 wide and smooth interspaces. The summit of each of these lobes 

 bears numerous minute, sharply- defined granules. A slightly-curved 

 row of seven granulated tubercles crosses the carapace opposite the 

 first marginal process. The mesogastric, as usual, sends forward, 

 to the base of the rostrum, a slender prolongation which separates 

 the protogastric lobes. The several branchial lobes are indistinctly 

 defined. Upon the metacardiac lobe are two large granulated 

 prominences ; and two or three of a similar size occur on the- 

 metabranchial. 



The abdomen and limbs are not preserved. 



"Width of carapace = 28 mm.; length = 23 mm. 



Affinities. — This is quite unlike any British fossil species with 

 which I am acquainted. It somewhat resembles an imperfect 

 specimen of Xanthilites verrucosus^ Schafh., from the Bavarian 

 Nummulitic beds figured and described by Milne-Edwards, but is, 

 I think, distinct from that form. The characters of the carapace 

 decidedly support an alliance with the recent genus Actcea. I- 

 dedicate this species to Prof. Wiltshire. 



Distribution.— Jjoyvev Greensand of Atherfield. 



Genus Etyus, Mantell. 



Etytjs Maetini, Mantell. 



1863. Bell, Monogr. pt. ii, p. 5 & pi. i, figs. 7-9 (not fig. 11). 



Supplementary. — Orbito-frontal border about a third of the width 

 of the carapace. Eostrum slightly produced. Antero-lateral margin 

 tumid, with three or four small tubercles supported on a slight 

 ridge. Posterior border rather wider than the orbito-frontal. An 

 areolar tubercle occurs on each of the metagastric, hepatic (close to 

 the antero-lateral border), and mesobranchial lobes. The sulcus 

 between the epi- and mesobranchial lobes scarcely reaches the 

 postero-lateral margin ; mesogastric lobe distinctly defined. Pterygo- 

 stomate region tumid, surface minutely granulated ; on the inner 

 portion of the inferior branchiostegite is an unusual oblique sulca- 

 tion. Sternum rather narrow ; episternum granulated, sharply re- 

 troflexed. Epistome granulated ; endostome narrowing posteriorly 

 and deeply emarginate. Exopodite of external maxilliped about 

 half as wide as the endopodite, which is furrowed longitudinally 

 and has the inner distal angle produced. Abdomen seven-jointed,, 

 the penultimate twice as long as the segment preceding it ; each^ 



