AMPHIPODA. 
Crust. 27 
Podocerus minutus, sp. n., Sara, Forh. Solsk. Cbr. 1882, p. 112, pi. vi. 
fig. 6, Norway. 
Icilius australis and punctatus (Haswell, 1879) are varieties of one 
species ; Haswell, Cat. Austral. Crust, p. 275, pi. iv. fig. 4, Port Jackson. 
Siphoncecetes pallidus , sp. n., Sars, l. c. p. 113, pi. vi. fig. 7, Norway, in 
Dentalium. 
Ipliigenia [name twice pre-occupied in Mollusca~\, g. n., like the pre- 
ceding, even more Isopod-like ; for I. typica , Thomson, Tr. N. Z. Inst, 
xiv. and N. Z. J. Sci. i. p. 44, New Zealand. 
Hyperiide. 
Clydonia borealis , sp. n., Sars, Forh. Selsk. Chr. 1882, p. 76, pi. iii. 
fig. 2, Lofoten Islands. 
PHRONIMATIDiE. 
General sketch of the family and special description of Phronima atlan- 
tica (Guerin), pacifica (Streets, 1877), and Phronimella clongata( Claus), 
all collected in the Pacific between 30° S. and 40° N. lat., and 81-160° 
W. long., by Streets, P. U. S. Nat. Mus. v. pp. 3-9, pi. i. figs. 1-5. 
CAPRELLID2E. 
Historical sketch and lengthy recapitulation of nearly all hitherto 
published concerning this family, with some new species and many wood- 
cuts, by P. Mayer, Caprelliden, pp. 1-83 ; table of known genera, pp. 17 
& 18 ; alphabetical list of all names of species, pp. 78-83 ; geographical 
distribution, some species cosmopolitan, pp. 84-90 ; general anatomy and 
histological description, pp. 91-164; development, pp. 165-168 ; biological 
observations, containing notes on mimicry, chromatophores, parasites, &c., 
pp. 179-184; theoretical ideas on their phylogeny, which is derived from 
the Gammaridce , pp. 185-193 ; bibliography, pp. 194-201. 
Caprellina longicornis (Nicolet), Mayer, l. c. p. 27, woodcut, New Zea- 
land and Chili. 
Protella phasma (Montagu), including dame and subspinosa (Kossmann), 
longispina (Kroyer), and major (Haller) ; id. 1. c. p. 29, pis. i. fig. 2, iii. & 
iv., Mediterranean. 
Protella haswelliana , sp. n., id. 1. c. p. 32, woodcut, Australia. 
Caprella (Lam.). On the variability of specific characters, only old males 
being capable of sure determination ; analytical table of 10 species ; C. 
acanthifera (Leach), including acuminifera (Desm.), automata and elon- 
gata (Haller), armata aud aspera (Heller), calva (Bate ),fabris (Nardo), 
and ferox (Tschernjafski), Naples ; C. grandimana , sp. n., Naples, C. cequi- 
libra (Say) = januarii (Kroyer) = esmarhi , and laticornis (Boeck) = 
obesa (Haswell), Mediterranean, British Seas, Norway, South Carolina, Rio 
Janeiro, New South Wales, and Hong Kong ; C. acutifrons (Latr.) — cor- 
nalia (Nardo) = dilatata (Dana) = geometrical Say) = pennanti (Leach), 
&c., Mediterranean, British Seas, North America, Rio Janeiro, Hong Kong ; 
