42 MR. E. J. MIERS ON CRUSTACEA FROM [Jan. 14, 



The colour is light yellowish brown, flecked with spots of darker 

 brown, of which two are rather proiniuent and situated oue on each 

 branchial region. 



Myra. 



The species of this genus, all of which occur in the seas of Eastern 

 Asia, bear a very close resemblance to one another ; and the form 

 and tuberculation of the carapace and anterior legs not improbably 

 alter considerably as the animal increases in age. On this account 

 it is not without much hesitation that I regard the specimens de- 

 scribed below as belonging to a distinct and undescribed form, as they 

 are all of small size ; but they cannot, in the present state of our 

 knowledge, be referred to any of the known species. 



Myra dubia, sp. n. 



Carapace convex, rhomboid-oval, longer than broad, and covered 

 with minute distant granules ; there is a faintly but distinctly marked 

 longitudinal median raised line. The median spine or tubercle is 

 but little longer than the lateral ones, conical and acute ; and a short 

 distance in front of it, on the front of the intestinal region, is another 

 very small but distinct tubercle. Front and hepatic regions as in 

 Myra carinata. Anterior legs about twice as long as the body, 

 slender ; arm distinctly and hand finely granulated ; fingers straight 

 and acute. Postabdomen of the male elongate-triangular, with the 

 sides nearly straight ; surface smooth and flat ; all the joints except 

 the last coalescent. Length 6| lines, breadth 5| lines. 



Three specimens, males, are in the collection, without definite lo- 

 cality. 



The nearest ally of this species is evidently the Myra carinata of 

 Bell from the Philippines, from which it difi'ers in the broader 

 carapace with shorter median posterior spine. Moreover it difi'ers 

 from this and all the other species of the genus in the existence 

 of the small tubercle in front of the posterior spine. There is, how- 

 ever, in the British-Museum collection a male individual from Hong- 

 Kong, of much larger size, which may be identical with the Japa- 

 nese species, in which the tubercle does not exist. From Myra 

 fugax, affinis, elegans, and mamillaris it diff^ers in the form of the 

 tubercles of the posterior margin and postabdomen of the male. 



Ebalia rhomboidalis, sp. n. 



Carapace rhomboidal, rather broader than long, uniformly and 

 finely granulated ; cardiac and intestinal regions convex but not 

 tuberculated. Frontal margin straight. Antero-lateral margins 

 straight and not interrupted, forming nearly a right angle with the 

 postero-lateral marjiins, which are nearly straight ; posterior mar- 

 gin, behind the intestinal prominence, obscurely bilobated. A 

 moderately prominent longitudinal median ridge joins the front and the 

 intestinal prominence with the elevated cardiac region ; and from the 

 cardiac and intestinal regions transverse ridges reach to the postero- 

 lateral margins. There is no tubercle on the pterygostomian 



