Crust. 42 
OSTRACODA, COPEPODA. 
Candona aUlefeldi, sp. n., Studer, Arch. f. Nat. xliv. p. 110, pi. iv. fig. 5, 
Kerguelen Island. 
Cy there atra and truncata, spp. nn., Thomson, Tr. N. Z. Inst. xi. p. 254, 
pi. xi. figs. A 2 & c 1 & 2, Otago Harbour, New Zealand. 
Loxoconcha punctata^ sp. n., id. 1. c. p. 255, pi. xi. figs, b 3, Otago Har- 
bour, New Zealand. 
Philomedes agilis^ sp. n., id. 1. c. p. 257, pi. xi. figs, c 3 & D 1, Taieri 
Beach, New Zealand, in rock pools. 
Acanthopus, g. n. [name preoccupied], Vernet, Arch. Sci. Nat. lx. [1877] 
p. 334 ; abstract in Ann. N. H. (5) i. p. 352. Antennae like those of 
Cytherd. One pair of jaws ; three pairs of feet armed by strong hooks at 
the basilar article; post-abdomen rudimentary, reduced to two lobes, 
each bearing two hairs. Lake of Geneva, in deep water. It does not 
swim, but burrows in the mud. 
COPEPODA. 
G. S. Brady has published the first part of a monograph of the British 
Copepoda, describing and figuring 49 species, belonging to 26 genera and 
5 families : Calanidce, Misophriidce, Cyclopidce, Notodelphyidoe (incl. Asci- 
dicolinoe), and Buproridce (gen. Enterocola). He also gives (p. 31) a list 
of 34 genera of Harpactidoe^ 2 of Corycmidce^ 1 of Sapphirinidve {Licho- 
molgus), and 4 of Artotrogidce, living in the British seas. The introduc- 
tion (pp. 1-31) treats of the general structure and habits of these 
animals, with hints for collecting and preserving them, a synoptical table 
of the names of the cephalothoracic members used by the principal authors 
(p. 14), tables for the classification and determination of the British 
genera, and a bibliographical list. As to habitat, the author mentions 
Diaptemus castor, Canthocamptus, and 12 species of Cyclops as living in 
fresh water ; the brackish water of salt marshes and small estuaries sus- 
tains, according to him, a peculiar Entomostracan fauna, characterized by 
Cyclops insignis and the genera Temora, Tachidius, Nannopus, Platy- 
chelipus, Mesochra, and Dalavalia ; pools of sea water above or at the 
extreme limit of high water mark are tenanted by Harjpacticus fulvus. 
Calanus finmarchicus and Anomalocera pater soni occur on the surface of 
the sea in immense profusion ; the former and Mctridia armata are in 
the Arctic regions many times the bulk of those taken in our own latitude. 
The fronds of Laminaria saccharina are the favourite abode of many 
species, more especially of the flat-bodied Porcellidiinm, and amongst the 
growth of smaller algae in tidal rock-pools, Copepoda are always to be 
found in abundance. On sandy bottoms, the most abundant species are 
Longipedia coronata and Ectinosoma spinipes. The bed of the sea, down 
to the extreme depths attainable round the British Islands, is inhabited by 
numerous Copepoda (pp. 7-9). Only the new species or those not before 
figured will be mentioned infra. 
Cyclopidj:. 
Cyclops helleri, sp. n., ? = clausi (Heller, 1872), macrurus (Sars, 1863), 
1878. [voL. XV.] B 18 
