57 Gnist, 
CRUSTACEA. 
Harpacticus fulvus (Fischer, 1860) = crassicornis (Brady) = curti- 
cornis (Bock) = Tigriopus lilljeborgi (Norman), uppermost margin of 
the littoral zone, shallow pools at or above high-water mark, everywhere 
round the British Islands, various places on the coasts of the Baltic and 
North Seas, and even at Kerguelen Island ; id. 1 . c. pp. 149-151, pi. Ixiv. 
figs. 1-11. 
Idya (Philippi, 1843) = Tishe (Lilljeborg, Claus), I. furcata (Baird, 
as Cyclops^ 1837) = T. ensifera (Fischer), almost ubiquitous in the British 
seas, littoral and lamiuarian zone ; id. 1 . c. pp. 171-174, pi. Ivii. figs. 1-11. 
? Cylindropsyllus, g. n. Body cylindrical, much elongated ; head 
united with thorax, abdomen 4-jointed, as wide as thorax. Rostrum 
sharp; anterior antennae short, 5-jointed, posterior 2-jointed, without 
secondary branch ; posterior ? foot- jaw small, provided with an apical 
curved spine and several marginal setae ; rest of mouth-organs unknown. 
First four pairs of swimming feet 2-branched, outer brunch 3-, inner 
2-jointed ; fifth pair rudimentary, 1-jointed, foliaceous. Systematic place 
doubtful ; somewhat like Idya. C. Icevis, sp. n., Hartlepool, 5 fath. 
Brady, op. cit. iii. pp. 23, 30 & 31, pi. Ixxxiv. figs. 1-8 (^Cylindrosoma on 
the plate, and in vol. i. p. 31). 
Peltidiidju. 
Notes on this subfamily, and analytical table of the known genera and 
two new subgenera, by G. Haller, Arch. f. Nat. xlvi. pp. 55-67. 
Scutellidium (Claus) = Aspidiscus (Norman), tisboides (Claus) and 
fasciatum (Bock, Porcellidium), British, on the fronds of Laminaria^ the 
former rare, the latter common; Brady, op. ciL ii. pp. 175-180, pi. Ixxviii. 
figs. 1-11, & pi. Ixxix. figs. 1-9. 
Zaus goodsiri, new name for Z. ovalis (Claus), not Sterope ovalis 
(Goodsir), British ; id. 1. c. p. 156, pi. Ixvi. figs. 10-13. 
Peltidium (Philippi, 1839) = Alteutha (Baird, 1845) = Carillus and 
Sterope (Goodsir, pt.) ; P. depressum (Baird) = C. oblongus (Goods.) = 
P. purpureum (Philippi P, White) = A. purpuricincta (Norm.), chiefly 
on Laminaria saccharina\ interruptum (Goods.) = A. bopyroides (Claus) 
= A. norvegica (Bock), all round the British shores; crenulatum, sp. u., 
Scilly Islands, at low-water mark on algae, and at the surface. Brady, 
1. c. pp. 158-164, pi. Ixxii. figs. 1-15, & pi. Ixxi. figs. 4-15. 
Oniscidium (Claus). Generic character enlarged ; first subgenus, Pelti- 
dium (Philippi, 1839) = Onucidium (Claus, 1863). Inner branch of the 
first pair of feet two-jointed, rarely three-jointed, armed with bristles. 
0. tri-articulatum and sculptum (Haller, 1879) fully described and 
figured ; Haller, Arch. f. Nat. xlvi. pp. 63-67, pis. iv. figs. iii. 7 & iv. 6, & 
pi. V. figs. 1-3, Messina. 
Zausoscidium (Haller, 1879), second subgenus of Oniscidium. Both 
branches of the first pair of feet prehensile, the third joint of the outer 
branch very small, armed with hooks / the inner branch two-jointed. Z. 
folii (Haller, 1879) fully described and figured. Haller, 1. c. pp. 67-70, 
pi. V. figs, iii., iv., & 4, Messina. 
Porcellidium (Claus, 1860) = Thy one (Philippi [j), i^. subrotundum 
(Norman), and 3 other species already figured, British, chiefly on the 
