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 sia"face, 

 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 minuticornis. Tab. XXV, fig. 3. 



Cyclops minuticornis, Milller, Eutomost., 117, 1. 19, f. 14, 15, 1781. 



— Latreille, Hist. Nat. Crust., iv, 267. 



— Bosc, Man. Hist. Nat. Crust., ii, 267. 



— Baird, Trans. Berw. Nat. Club, i, 97. 

 MoNOCULUS MINUTICORNIS, Matiuel, Euc. meth., vii, 720, t. 264, 



f. 21, 22. 



— Gmeliii, Linn. Syst. Nat., edit. 13tli, i, 



2998, No. 17. 

 Cyclops inermis, TUesius, Mem. de I'Acad. de St. Petersb.,v.t. 8,f.9. 

 Canthocarpus minuticornis, ^<5<»-fi?, 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 witli a stout seta of about 

 half the length of the animal. The antennae are divided 



* The figures in tab. XXX, of this pretty little speeies, are from sketclies 

 made by Mr. Salter, at Poole, in September 1844, for whicli, with some in- 

 teresting notes, I am indebted to the courtesy of Professor T. Bell, whose 

 kindness, during the time 1 have been preparing this monograph, I feel real 

 pleasure in acknowledging. 



