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. 

 1S44, Henry Hyde Salter, Esq.* 



4. CANTHOCAMPTUS MINUTICORNIS. Tab. XXV, fig. 3. 



CYCLOPS MiNUTicoKNivS, Midler, Entomost., 117, 1. 19, f. 14, 15, 1781. 



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



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



Saird, Trans. Berw. Nat. Club, i, 97. 



MONOCULUS MINUTICOBNIS, Manuel, Enc. rueth., vii, 720, t. 264, 



f. 21, 22. 



Gmelin, Linn. Syst. Nat., edit. 13th, i, 



2998, No. 17. 



CYCLOPS INEKMIS, Tilesius, Mem. de 1'Acad. de St. Petersb.,v.t. 8,f.9. 

 CANTHOCAKPUS MINUTICORNIS, 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 antennae 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. 



