12 THE ENTOMOSTRACA OF 



Genus — CYvnoi%, Zenker, 1854. [Ci/jjr is, Knct. ':' Notodromas,\A\]eh. 1853.) 



Animal like -C^^jym, excepting that the eye is almost completely divided, and the 

 mucus-gland of the male genital apparatus is differently constructed. Carapace like 

 that of Cypris. (To this genus Zenker refers C. monacha, Miiller, and C. dispar, 

 Fischer.) 



Ge7ms — NoTODROMAS, Liljeborg. 1853. {Cypris, Auct. ? Cyprois, Zenker. 1854.) 



Animal like Cypris, excepting that the eye is double, — the second pair of maxillae 

 have no branchial appendage, — and the pencil of setae on the lovs^er pair of 

 antennae is very long. Carapace resembling that of Cypris. Liljeborg quotes C. 

 monacUa, Miiller, only as belonging to this genus. Probably Zenker's genus Cyprois is 

 the same as this ; but some important points of comparison are still required to be 

 worked out before, in this as in other instances, the researches of MM. Liljeborg and 

 Zenker can be estimated at their full value.] 



No. 1. Cypris setigera, Jones. Plate \, fig. 6 a — 6 d. 



Cypeis setigeka, Jones. Annals and Mag. Nat. Hist., 2d ser., vi, p. 25, t. 3, fig. 3 a—e. 



INCH. 



Length, -g-V Recent? 



Post-tertiary : Berkshire and Cambridgeshire. 



Carapace ovate, somewhat pear-shaped : valves convex ; obliquely curved on the 

 dorsal, and nearly straight and somewhat incurved on the ventral border ; narrower 

 and tapei'ing anteriorly ; bordered by a narrow rounded marginal rim ; covered with 

 fine spines : hinge-line occupying rather more than the central third of the dorsal edge : 

 right valve narrower, straighter on the dorsal, and more incurved on the ventral margin, 

 than the left valve. Lucid spots six, arranged on two transverse parallel rows. 

 (System b, see p. 5.) 



Dorsal aspect acute-oval ; anterior, oval. 



PlentifuP in the Peat-deposits of the Kennet Valley^ at Newbury, and in the Peat- 

 marl of Cambridgeshire."' 



1 Probably this is also a recent species, although it has as yet apparently escaped notice. The some- 

 what similar carapaces figured and described by earlier authoi's are not sufiiciently elucidated for exact and 

 satisfactory comparison. 



'•^ For an account of these Peat-deposits, see the Appendix to my Lecture on the Geology of Newbujij> 

 &c., p. 40, 1854. 



2 See 'Quart. Journal Geol. Soc.,' vi, p. 451. 



