160 STALK-EYED CRUSTACEA. 
ACANTHEPHYRA A. M. Epw. 
? Ephyra Roux, Mém. sur la Classif. des Crustacés de la Tribu des Salicoques, p. 24, 1831 (type, dipheus 
pelagicus Risso). 
? Miersia (nom. nov. vice Ephyra preoc.) Kinestry, Proc, Acad. Nat. Sci. Phila, 1879, p. 416 (same 
type). 
Miersia Suir, Bull. Mus. Comp. Zodl., X. 66, 1882. 
Acanthephyra A. M. Eywanps, Aun. Sci. Nat., Zool., 6¢™° Sér., Vol. XI., Art. 4, p. 12, 1881 (type, Acanthe- 
phyra armata A. M. Edw.) ; id., Recueil de Figures de Crustacés nouv. ou peu connus, 1° Livr., Plate 
XXXIIL, 1883; Surru, Am. Rep. U.S. Fish Comm. for 1882, p. 372, 1884; id., Proc. U. 8. Nat. Mus., 
VIL. 502, 1885; id., Ann. Rep. U. 8. Fish Comm. for 1885, p. 667, 1886; Woop-Mason, Ann. Mag. 
Nat. Hist., 6th Ser., VII. 195, 1891, IX. 358, 1892; Srepsine, Hist. Crust., p. 243, 1893; Faxon, 
Bull. Mus. Comp. Zodl., XXIV. 206, 1893; Ortmann, Decap. u. Schizop. der Plankton-Exped., p. 43, 
1893. 
Acanthephyra + Systellaspis Bat, Rep. Challenger Macrura, pp. 730, 757, 1888 (type of Systedlaspis, 
S. lanceocaudata Bate). 
So little is known concerning the structure and affinities of Alpheus pelagi- 
cus Risso,* the type species of the genus Miersia Kingsl. (= Ephyra Roux, 
nom. preeoc.), that it seems best to ignore Miersia (Ephyra) as based upon a 
species at present indeterminable, and to suppress family and subfamily 
names derived therefrom. The lower Afyidw, genera characterized by palp- 
less mandibles and by the presence of exopods on all the thoracic legs,t+ 
may receive the subfamily name Paratyime, from Paratya Miers t (type, 
Ephyra? compressa De Haan).§ The genus Atyephyra,|| with Caridina-like 
chelze and with exopods on only the first two pairs of legs, forms a transition 
from the Paratyine to the Atyine. Ephyra hackeli v. Mart.** belongs to the 
family Hoplophoride and probably to Acanthephyra, subgen. Systellasps Bate. 
* Alpheus pelagicus Risso, Hist. Nat. des Crustacés des Environs de Nice, p. 91, Plate II. Fig. 7, 1816. 
Pandalus pelagicus Risso, Hist. Nat. de ’ Europe Mérid., V. 79, Plate II. Fig. 5, 1826. 
+ Such forms have been called Méerstide by Pocock (Ann. Mag. Nat. Hist., 6th Ser., III. 17, 1889), 
Ephyrine by Ortmann (Zoolog. Jahrb., Abth. f. Syst., V. 456, 1890). 
+ Ann. Mag. Nat. Hist., 5th Ser., IX. 194, 1882. 
§ Siebold’s Fauna Japonica, Crustacea, p. 186, Plate XLVI. Fig. 7, Plate O, 1849. 
|| A¢yaephyra Brito Capello, Descripeao de algunas Especies Novas ou pouco conhecidas de Crustaceos, 
ete., p. 5, Plate I. Fig. 1-le, 1866; in Mem. Acad. Sci. Lisboa, Cl. de Sci. Math., Nova Serie, T. IV. 
Part L., type, d/yaephyra rosiana Brito Capello. Ortmann (Zoolog. Jahrb., Abth. f. Syst., V. 464, 1890) 
has recently established the genus Hemicaridina for the reception of Hippolyte desmarestit Millet (Cari- 
dina desmarestii Joly). Since this species is strictly congeneric with Atyephyra rosiana, Hemicaridina be- 
comes a synonyme of Afyephyra. 
** Arch. f. Naturgesch., XXXIV. I. 52, Plate I. Fig. 74, 76, 1868. 
