REPORT ON THE CRUSTACEA MACRURA. 733 



present, can be so interpreted; neither are the four spines and the channelled rostrum 

 present in the several species of the genus. A. Milne-Edwards says that Miersia gracilis, 

 Sidney Smith, is identical with his Acanthephyra debilis, var. europea. 



It consequently follows that as Acanthephyra of A. Milne-Edwards differs from 

 Kingsley's description of Miersia, Milne-Edwards' name cannot be accepted as a synonym 

 of Kingsley's type, viz., Pandalus pelagicus of Risso (Ephyra pelagica, Roux, Miersia 

 pelagica, Kingsley). Mr. Sidney Smith 1 says — " As far as I know the only described 

 species properly referred to this genus are M. pelagica and punctulata (Risso sp.), both 

 apparently unknown to modern carcinologists, and M. Haeckelii [Ephyra Haeckelii, von 

 Martens), all from the Mediterranean. Ephyra compressa, de Haan, placed in Miersia 

 by Kingsley, had already been referred to Atyephyra by von Martens (Archiv fiir 

 Naturgesch., xxxiv., 1868, pi. i. figs. 4a to 4c), and is certainly not closely allied to the 

 species here described nor to M. Haeckelii." 



That to which de Haan gave the name of Ephyra is a fresh-water species from 

 Japan, and some confusion appears to have arisen in consecpience. 



Mr. Edward Miers, late of the British Museum, in a Note on a Fresh-water 

 Macrurous Crustacean from Japan, 2 says that the species described by de Haan as 

 Ephyra ? compressa, von Martens refers to the genus Atyephyra of Brito-Capello, and 

 that " Miersia [Ephyra) has a marine habitat, and, as von Martens has shown, is 

 distinguished by possessing a mandibular palpus, by the position of the inferior lateral 

 spine of the carapace, the carinated post-abdomen, and by other characters." Mr. Miers 

 says also that Mr. Kingsley's diagnosis of his family Atyidae needs emendation as 

 regards the mandibular palp. 



Acanthephyra purpurea, A. Milne-Edwards (PL CXXIV. fig. 3). 



Acanthephyra purpurea, A. Milne-Edwards, Comptes rendus, t. xcii. p. 1396, 1881. Recueil de 



Fig. de Crust, nouveaux ou peu connus, 1883. 

 Miersia agassizii, Sidney Smith, BulL Mus. Comp. Zool., vol. x. p. 67, pi. xi. figs. 5-7, pi. xii. 

 figs. 1-4, 1882. 



Carapace sfightly compressed, and anteriorly produced to a long and slender rostrum, 

 armed on the upper margin with nine or ten rather distant teeth, and on the under 

 margin with five or six. 



Pleon subcarinated from the posterior margin of the second somite to that of the 

 sixth, the third, fifth, and sixth being posteriorly produced to a tooth. 



Telson longer than the sixth somite, gradually tapering to the extremity, the dorso- 

 lateral margin being armed with several minute spinules. 



Ophthalmopoda rather small and somewhat pyriform. 



1 Bull. Mus. Comp. Zool, vol. x. p. 66. 



2 Ann. and Mag. Nat. Hist., ser. 5, vol. ix. p. 193, 1882. 



