218 
CRUSTACEA. 
Cytherura fulva^ sp. n., and sars^ (Brady), id. 1. c. pp. 116 & 117, pi. iv. 
figs. 1-5, & 6, 7, Scilly Islands. 
Cytherideis subulata^ yar. n. fasciata^ id. 1. c. p. 117, pi. v. figs. 1-5, 
Scilly Islands. 
Paradoxostoma cuneatum, sp. n., id. ibid. figs. 6 & 7, Scilly Islands. 
Darwinella, new name for PolycTieles (Brady, 1870, nec Heller, 1862 ; 
Zool. Bee. vii. p. 201) [Darwinella also is pre-occupied in the sponges by 
F. Muller, 1865]. A full description of it is given, and the conclusion 
drawn, that this genus is intermediate between the two families, 
Cyprididee and Cytheridcn^ though more nearly approaching the latter. 
Brady, Ann. N. H. (4) xiii. p. 117. 
OOPBPODA. 
R. Kossmann, Verb. Ges. Wiirzb. (2) vii. pp. 280-289, reviews the 
systematical arrangement of this Order, and proposes a modification 
of it, founded on the degrees of reduction in the thoracic and abdominal 
segments, as follows : — 
Sub-Ord. 1. Eleuthera, all of which continue free swimmers in their 
adult state. 
Sub-Ord. 2. Parasitica. 
Fam. 1. Holotmeta. All segments distinct, except the first thoracic 
one in some of them. 
Sub-fam. 1. Ascomyzontidoi: two free ovisacs. Ascomyzon^ Aste- 
rocheres^ Dys^wntius, ArtotroguSy Terebellicolay SabelliphiluSy 
Sepicola, Eolidicolay LichoniolguSy EucanthuSy BomolochuSy 
Clausidiumy Doridicolay Ther sites y ErgasiluSy Nicothoe. 
Sub-fam. 2. Notodclphyidm : eggs carried in cavities formed by 
tho latter thoracic sogmonts. NolodelphySy OoniodelphySy 
DoropyguSy NotopterophoruSy BotachuSy Gunentophorus. 
Sub-fam. 3. Ascidicolidee : eggs agglutinated on the back, and 
protected by two lamellar outgrowths of the fourth thoracic 
segment: Ascidicolay ? Conephilus. 
Fam. 2. Hemitmeta. Segmentation imperfect in the adult. 
Fam. 3. Atmeta. Segmentation entirely wanting in the adult. 
Calanidjj. 
Cetochilus septentrionalis (Goodsir) abounding in the Arctic Sea ; the 
genus appears sufiiciently distinct from CalanuSy but the several species 
distinguished by Kroyer are rather questionable. Buchholz, Zweite 
deutsche Nordpola,rfahrt, pp. 390 & 391, pi. xv. fig. 2. 
Diaptomus castor (Jurine). A specimen apparently belonging to this 
species found at the side of the ship in East Greenland, February, 1870 ; 
id. 1. c. p. 392. 
, OYCLOPIDiE. 
Thorellia brmnea (Bock), from East Greenland ; id. 1. c. p, 395. 
