CANTHOCAMPTUS. 
211 
a long, slender, slightly-curved stalk, toothed or serrated 
on the upper edge, and terminating in three or four hairs. 
The external ovary (t. XXX, f. 4 a) is single, large, oval- 
shaped, and generally lying across the abdomen, in con- 
sequence perhaps of which the animal generally swims 
prone or supine, seldom swimming on its lateral surface, 
as the other species do. I have met with but few specimens 
of this species, all of which were females ; and in two or 
three of these there was attached to the dorsal surface of 
the fourth segment of the body a substance very much 
resembling a polype, consisting of a pedicle and three 
branches, each branch terminated by four short fingers. 
Hah. — Berwick Bay, 1835 ; not common. Dover, 
North Foreland, September 1849 ; rare. Poole, Sept. 
1844, Henry Hyde Salter, Esq.*~ 
4. Canthocamptus minuticoenxs. Tab. XXV, fig. 3. 
— Cyclops minuticoenis, Muller , Entoraost., 117, 1. 19, f. 11, 15, 1781. 
— latreille , Hist. Nat. Crust., iv, 267. 
— Bose , Man. Hist. Nat. Crust., ii, 267. 
— Baird , Trans. Berw. Nat. Club, i, 97. 
Monoculus minuticoenis, Manuel, Enc. meth., vii, 720, t. 264, 
f. 21, 22. 
— Gmelin, Linn. Syst. Nat., edit. 13th, i, 
2998, No. 17. 
Cyclops ineemis, Tilesius, Mem. de l’Acad. de St. Petersb.,v.t.8,f.9. 
Ca.nthocae.ptjs minuticoenis, Baird, Trans. Berw. Nat. Club, ii, 154. 
The thorax is composed of four segments, each termi- 
nating at the back in a sharp spine. The first segment, 
comprising, like the other species, the head, is the largest, 
and is strongly marked with a large black spot, covering 
half of it, and very discernible to the naked eye. 
The abdomen consists of five segments, the terminating 
one being bilobed, and furnished with a stout seta of about 
half the length of the animal. The antennse are divided 
* The figures in tab. XXX, of this pretty little species, are from sketches 
made by Mr. Salter, at Poole, in September 1844, for which, with some in- 
teresting notes, I am indebted to the courtesy of Professor T. Bell, whose 
kindness, during the time I have been preparing this monograph, I feel real 
pleasure in acknowledging. 
