20 



A sharp tooth on sloping sides of carapace, on branchial 

 regions; another tooth on pterygostomial regions, on either 

 side of buccal cavern. Eyes, like antennae and antennulae, 

 completely hidden beneath the front E. filholi de Man 



3. Front truncate ' E. truncata A. Milne-Edwards 



Front shortly triangular 4 



4. Front somewhat deflexed; borders of carapace and legs wholly 



beset with numerous stiff hairs, much resembling spines, 



but flexible on the legs E. pilosa A. Milne-Edwards 



Front horizontal, lamellar ; legs naked or sparsely hairy. . 5 



5. Carapace narrowed into a "neck" anteriorly, upper part of 



carapace and all the legs more or less hairy .... 6 

 Antero-lateral parts of carapace not forming a "neck", cara- 

 pace and legs wholly hairless (save the dactyli of the latter) 7 



6. Carapace somewhat angular, neck very long ; rostrum con- 



siderably projecting beyond the eyes, not excavated at 



upper surface E. longirostris Filhol 



Carapace rounded, neck shorter ; rostrum scarcely projecting 

 beyond the eyes, leaving the eye-stalks exposed from above, 

 strongly excavated at upper surface E. wJiitei Miers 



7. Carapace rounded, not angular, broadly piriform; front very 



broad between the eyes E. sindensis Alcock. 



Carapace more or less angular 8 



8. Posterior lateral sides of carapace and posterior border nearly 



straight or slightly concave, meeting at distinct angles . 9 

 Posterior lateral sides of carapace and posterior border forming 

 together a semicircle 10 



9. Carapace pentagonal, anterior part triangular, antero-lateral 



prominence scarcely indicated, posterior angle (above base 



of cheliped) pronounced . ' ' E. gracilis Borradaile 



Carapace heptagonal, owing to the antero-lateral angle being ' 



prominent; sides concave between the posterior and 



anterior angle '), and between the latter and the base of 



the rostrum E. kirki Filhol 



10. Carapace with one pair of angles ; rostrum small, little 



prominent E. mat/mei (Desmarest) 



Carapace with two pairs of much prominent angles; rostrum 



broad, much prominent E. producta Kirk 



1) Fn.iioi. (Miss. ile Campbell, t. 3, 1885, p.405) calls these sides convex, and mentions this character as a dilïerence between 

 his species and E. producta Kirk, but in his figu-re (pi. 47, f. 6) the reverse is shown. Besides, in the explanation of plates, another 

 specimen (->) is referred to the present species (pi. 47, f. 8), though only the anterior angle of the carapace is indicated. 



