48 
THE VOYAGE OF H.M.S. CHALLENGER. 
Hyas coarctata, Leach. 
Hyas coardata (us), Leach, Malacostraca Podophthalmata Britannise, pi. xxiB. figs. 1 ( 3 ) 2 
(?), 1815 - 
„ „ Milne Edwards, Hist. Nat. Crust., vol. i. p. 312, 1834; Crust, in Cuvier, 
R&gne Animal, ed. 3, pi. xxxii. fig. 3 (outline). 
„ ,, Bell, British Crustacea, p. 35, woodcut, 1853. 
„ „ Hoek, Niederland. Archiv f. Zool. Suppl., Bd. i. p. 3, pL i. fig. 1, 
1882, var. 
Lissa fissirostra, Say, Journ. Acad. Nat. Sci. Philad., vol. i. p. 79, 1817. 
Hyas serratus, Hailstone, Ann. and Mag. Nat. Hist., voL viii. p. 262, woodcut, 1835. 
„ coardata, var. alutacea, Brandt, in Middendorf’s Sibirische Reise, voL ii. p. 79, 1851, 
var. 1 
„ bufonius, White, List Crust. Brit. Mus., p. 6, 1847. 
,, latifrovs, Stimpson, Proc. Acad. Nat. Sci. Philad., p. 217, 1857. 
An adult but small male was collected at Station 48, south of Nova Scotia, in 51 
fathoms, with the preceding species, and a smaller male at Station 49, near the same 
locality, in lat. 43° 3' 0" N., long. 63° 39' 0" W., in 85 fathoms. 
These specimens belong to the typical form of the species. 
The larger male measures as follows : — 
Adult (J. 
Lines. Millims. 
Length of carapace and rostrum, nearly 
15 31-5 
Breadth of carapace, ..... 
10 21 
Herbstia, Milne Edwards. 
Herbstia, Milne Edwards, Hist. Nat. Crust., vol. i. p. 301, 1834. 
„ Miers, Journ. Linn. Soc. Lond. (Zool.), vol. xiv. p. 654, 1879, et synonyma. 
Carapace depressed, broadly pyriform, with the dorsal surface usually spinose or 
tuberculated ; the rostrum short, more or less deeply divided by a median notch or 
fissure into two lobes, which are vertically compressed and dilated at the base, and distally 
acute. Orbits shallow, with or without a prseocular spine. Post-abdomen (in the 
male) seven-jointed. Eyes short, and when retracted usually partially visible in a 
dorsal view. Antennae with the basal joint moderately dilated and armed with a spine 
at the antero-external angle, and often with another on the outer margin at the base ; 
flagellum exposed and visible from above at the sides of the rostrum. Exterior 
maxillipedes with the merus-joint distally truncated and not produced at the antero- 
external angle ; the antero-internal angle, where the next joint articulates, slightly 
emarginate. Chelipedes (in the adult male) moderately developed, with the palm (in the 
typical species) considerably enlarged ; fingers arcuate, strongly toothed, and having 
between them, when closed, a wide interspace ; in others, the palm is more slender, and 
the fingers nearly meet along the inner margins and are very obscurely dentated. 
