81 
1837. Sergestes, Milne-Edwards, Hist. Nat. Crust., Vol. II., p. 
427. 
1849. Sergestes, de Haan, Crust. Japonica, decas sexta, p. 189. 
1850. Sergestes, de Natale, Descrizione zool. di alcuni Crostacei 
di Messina, p. Ig. 
1855. Sergestes, Kroyer, Overs. K. Danske Vid. Selsk. For- 
handl., p. 22. 
1855. Sergestes, Kroyer, Monogr. Sergestes, K.D. Vid. Selsk. 
Skriten, Ser 5, Volel Va, p: 2x0: 
1860. Sergestes, Stimpson, Proc. Acad. Philad., p. 44 (114). 
1880. Sergestes, Boas, Vid. Selsk. Skr., Ser. 6, Afd. 1, p. 13 (35). 
1894. Sergestes, Alcock and Anderson, Journ. Asiat. Soc. 
Bengal, Vol. LXIII.; Pt. 2; No. 3; p. 8. 
Other references have been already supplied under the head- 
ing of the family. The tabular view given by Ortmann in 1893, 
of all the species then known, will still be found useful, although, 
as Hansen has since pointed out, many of the distinctions em- 
ployed are only signs of immaturity. In the definition of the 
genus which Ortmann gives in 1898, he agrees with Milne- 
Edwards and Spence Bate in speaking of the fourth and fifth 
peraeopods as short and feeble. But the epithet “‘ short ” is 
not particularly applicable to the fourth pair in various species, 
as for example S. bisulcatus, of which Dr. Ortmann reproduces 
Faxon’s figure. Whether the fourth and fifth peraeopods are 
really weak is questionable, considering the fringes of very long 
plumose setze which their joints carry. Ortmann indeed at the 
earlier date accepted Stimpson’s genus Sergia for species in 
which the fourth and fifth peraeopods were little shortened, 
and had laminar terminal joints, but later on, while accepting 
from Hansen the reunion of Sergia with Sergestes, he has 
omitted the corresponding modification which the generic 
definition then required. 
Sergestes arcticus, Kroyer. 
1855. Sergestes arcticus, Kroyer, Overs. K.D. Vid. Selsk. For- 
handl., Nomina 
1859. Sergestes arcticus, Kroyer, K.D. Vid. Selsk. Skr., Ser. 5, 
Aid. 4,,p:240, Plog thie aeg, Pl. 5, fie. 16. 
1875. Sergestes Meyer1, Metzger, Nordseefahrt der Pommerania, 
pp. 289, 302, Pl..6, fie. 7. 
1882. Sergestes arcticus, S. I. Smith, Bull. Mus. Comp. Zodl., 
Vol. X., p. 96, .Plen6, tiga 4: 
