37 Grust. 
CRUSTACEA. 
Northern Europe in brackish water ; 8 specimens out of 60 survived for 
nearly three months in sea water ; the eggs are very large ; its develop- 
ment is abbreviated in comparison with the marine PalcemonidcB ; at the 
moment of hatching, the young animal has already all cephalic and 
thoracic members and the greater part of the gills, the five anterior pairs 
of abdominal feet are present in the form of buds ; the second and third 
pair of the future maxillipeds are still ambulatory. There is no stage 
after hatching which can be compared with a My sis. P. Mayer, MT. z. 
Stat. Neap. ii. pp. 197-217, pi. x. 
Urocaris longicaudata (Stimps.), North Carolina and Florida, described 
by Kingsley, P. Ac. Philad. 1879, pp. 424 & 425. 
Palcemon. Generic characters discussed by Boas, 1. c. pp. 47-50, pi. i. 
figs. 5 & 25, pi. ii. fig. 45, pi. hi. figs. 81 & 105. 
Palcemon ornatus (Oliv.) = vagus, and equidens (HeWer) =■ reunionensis, 
mayottensis, and longimanus (Hoffm.), P. dispa7') Martens) = alphonsianus 
(Hoffm.), P. lepildoyiactylus (Holfm.), P. rosenbergi (Hoffm.), perhaps 
= carcinus (L.), all Malayan ; Miers, Ann. N. H. (5) v. pp. 382-384. 
Palcemon maillardi, sp. n., and idee (Heller), Mauritius, freshwater, the 
latter also Seychelle Islands ; Richters, Decap. Maur. p. 166, the former, 
pi. xviii. figs. 1-3. 
Peneidj;. 
J. E. V. Boas reviews the characters of this family, and more particu- 
larly those of Peneus, Sicyonia, which is very near the preceding, Steno- 
pus, and Sergestes, and includes in this family also Leucifer, which is, 
according to him, an abnormal Sergestes. Cerataspis longiremis and mon- 
struosa he thinks to be the larvae of Peneidee in a Mysis-like stage, but 
he cannot refer it to any known genus of this family. Dan. Selsk. Skr. 
(6) i. 2, pp. 28-46, pi. i. figs. 1, 37, & 38; abstract and recapitulation, 
pp. 155 & 164-170, pi. i. figs. 1-3 & 21-23, pi. ii. figs. 39-43 & 70-75, pi. hi. 
figs. 99-104, pi. iv. figs. 129-131, pi. v. figs. 146 Sc 162, pi vi. figs. 187-191. 
Peneus trevirosiWs (Kingsley, 1878), from the West Coast of Nicaragua, 
= hrasiliensis (Latr.), North Carolina to Brazil ; Kingsley, P. Ac. Philad. 
1879, p. 427. 
Peneus jeyneri, sp. n., Miers, Ann. N. H. (5) v. p. 456, footnote, Yoko- 
hama. 
Stenopusculus, g. n. Near Stenopus, but basal joint of the outer 
antenna) provided with a scale as in Peneus ; the last joints of the fourth 
and fifth pair of periopods with few or no articulations. S. plumicornis, 
crassimanus, and scabricaudatus, spp. nn., Mauritius. Richters, Decap. 
Maur, pp. 167 & 168, pi. xviii. figs. 16-32. 
Pasiphae {tarda, Kr.) ; generic characters discussed by Boas, 1. c. pp. 65 
& 66, pi. i. fig. 27, pi. ii. fig. 48, pi. hi. figs. 83 & 107, pi. v. fig. 152. 
SERGESTIDiE. 
Lucifer reynaudi (M.-E.), Kossmann, ZooL Reis. ii. p. 84, pi. iv. figs. 1 
& 2, Red Sea. 
