(76 MR. G. S. BRADY'S MONOGRAPH OF 



narrow* t, the hindermost the broadest. On the ventral aspect the bands are not visible 

 The middle and posterior bands are sometimes connected along the hinge-margins by [ 

 broad longitudinal band of the same colour (see figs. 27, 28). In this condition it is 

 Cypris sella (Baird). 

 length A- in., height yg- in. 



C. vidua is a common and widely distributed species. I have specimens from many 



fferent localities, ranging from Kent to Dumfriesshir 



2. 



Cypuidopsis aculeata (Lilljeborg). (Plate XXIV. figs. 16-20, and Plate XXXVI. 

 fig. 10.) 



Cypris aculeata, Lillj. De Crust, ex ord. trib. p. 117, t. xi. figs. 15, 16; Norman, Ann . & Mag. Nat. Hist, 

 vol. ix. (1862) p. 44, pi. ii. figs. 7-10, and Trans. Tynes. Nat. F. C. vol. v. p. 147, pi. iii. figs. 7-10. 



Valves broadly reniform or subtriangular, convex ; greatest height in the middle, equal 

 to two-t birds of the length. The anterior and posterior margins are well rounded, the 

 latter being somewhat the broader of the two. Ventral margin deeply sinuated in the 

 middle ; dorsal very boldly arched, almost angular in the middle. Seen from above, the 

 carapace is ovate, pointed in front, and rounded behind, broadest in the middle; width 

 equal to half the length. The end view is ovate, rounded at the base and rather pointed 

 th >ve. The whole surface of the shell is thickly pitted and beset with stiff hairs, mingled, 

 more particularly near the dorsum, with strong, pointed spines (fig. 20). Colour bluish 

 j;reen or dirty brown. The limbs are altogether very robust. Seta? of the lower antennae 

 about equal, and reaching much beyond the apices of the terminal claws. The mandi- 

 bular palp bears four strongly plumose setae (much like those of Cypris compressa) , the 

 uppermost of which is broad and somewhat lancet-shaped. The terminal claw of the 

 first foot is strongly curved, and serrated for a short distance near the apex ; the serra- 

 tures, however, do not extend quite to the point of the claw. 



Length A- in., height 



O"" 4 5 ±xx 'i nci ut 7 5 - 



Hab 



rf- 



Durham (Rev. A. M. Norman); Monkw 



Pond, Hylton Dene, and AYarkworth (G. S. B.). In a pond a little above high-water mark, Cumbrae 

 {Mr. D. Robertson). 



This pretty species, though apparently much restricted in its range of habitat, occurs 

 very abundantly in congenial situations, preferring, like Cypris salina, water impregnated 

 with salme matters. Of the eight localities here mentioned, seven were slightly brackish 

 in character, and the other was, as already noted (C. salina), loaded with salts of lime. 

 At Monkwearniouth Colliery it occurred in company with Cypridopsis vidua, Cypris 

 reptans, C. salina, Daphnia vetula, &c. ; at Hylton Dene with C. gibba, C. compressa, 

 landona Candida, Mysis vulgaris, Falcemon varians, CoropUum longicome, and many 

 freshwater plants and animals ; at Warkworth with Cypris salina, Cytheridea torosa, 

 y^orm sphczneus, and Daphnia vetula ; at Gravesend with C. gibba, Candona Candida, 

 tythendea torosa, and Crangon vulgaris. 



The only b 8pecimens ! haye seen were from Grayesend Grimsb and Wark- 



worth ; these have the appearance of being coloured by dirty water. 



\ 



