26 Grust. 
CRUSTACEA. 
On New Zealand Copepoda ; Gr. M. Thomson, Tr. N. Z. Inst. xv. pp. 
93-116, pis. v.-xi. 
Calanidjj. 
Calanus valgus and ionsus , Pacific and South Atlantic, princeps, 
12.5 mm., the largest of the Calanidce, North Atlantic, spp. nn., Brady, 
Copep. ‘ Challenger,’ pp. 33-37, pis. iii. figs. 1-7, & iv. figs. 3-9. 
Eucalanus setiger ) sp. n., id. 1. c. p. 39, pi. iii. figs. 8-15, Mid Atlantic 
and Pacific. 
Rhinocalanas gigas, sp. n., id. 1. c. p. 42, pi. viii., South Atlantic, Southern 
Indian Ocean, and Northern Pacific. 
Hemicalanus orientalis , Banda Sea, and aculeatus , Pacific, spp. nn., id. 
1. c. p. 45, pis. ix. figs. 8 & 9, x. figs. 1-4, & xlvi. figs. 2-4. 
LeucJcartia P scopularis , sp. n., id. 1. c. p. 51, pi. xiv. figs. 1-5, N. 
Pacific. 
Scolecithrix , g. n. Distinct from Undina by a short and furcate ros- 
strum ; anterior antennae in the female twenty- to twenty-three-jointed, 
in the male nineteen- jointed ; anterior foot-jaw bearing at the apex, 
instead of the usual curved setae, a bunch of thick flexuous (sensory?) 
filaments; abdomen in both sexes four-jointed. S. dance (Lubbock, as 
Undina ), Pacific and North Atlantic, minor , sp. n., Southern Indian 
Ocean. Id. 1. c. pp. 56-59, pis. xvii., xvi. figs. 15 & 16, & xviii. figs. 1-5. 
J Euchceta philippi , South Atlantic, australis , Australia and South 
Atlantic, gigas and barbata , South Atlantic, id. 1. c. pp. 64-66, pis. xxi. 
& xxii. 
Calanoides , g. n. Distinct from Calanus by the want of a mandible in 
the male ; fifth pair of feet in the same as in Euchceta. C. patagoniensis , 
sp. n., South Pacific. Id. 1. c. pp. 74 & 75, pi. xxiii. figs. 1-10. 
Aetidius, g. n. Distinct from Calanus by the inner branches of the 
feet being one-jointed in the first, two-jointed in the second, three- 
jointed in third and fourth pair, fifth pair rudimentary in the male and 
absent in the female; rostrum strongly-hooked. A. armatus , sp. n., 
Southern Indian Ocean, Torres Straits, and Chinese Sea. Id. 1. c. pp. 75 
& 76, pi. x. figs. 5-16. 
Drepanopus , g. n. The anterior four pairs of swimming feet as in 
Aetidius , but the fifth two-brauched, prehensile, dissimilar on both sides, 
rudimentary in the female. D. pectinaius , Southern Indian Ocean, and 
furcatus , Southern Pacific and Mid Atlantic, spp. nn. Id. 1. c. pp. 76-78, 
pis. iv. figs. 1 & 2, & xxiv. 
Pliyllopus , g. n. Anterior antennte twenty-four-jointed ; maxilla-palp 
rudimentary ; inner branches of all the swimming feet (?) three- jointed, 
fifth pair in the male ? one-jointed, the last joint leaf -like. P. bidentatus, 
sp. n., South Atlantic. Id. 1. c. p. 78, pi. v. figs. 7-16. 
Diaptomus sicilis , leptopus , and stagnalis, spp. nn., and sanguineus 
(Forbes), Lake Michigan ; Forbes, Am. Nat. xvi. [1882] pp. 541, 542, & 
645-647, pi viii. figs. 1-14 & 17-20. 
Diaptomus castor (Jurine). A number of varieties observed in the 
Mississippi Valley from Lake Superior to the Gulf of Mexico ; sometimes 
