OF THE PURBECK FORMATION. 337 



Cypns vcddensis, Fitton, Trans. Geol. See. 2 ser. vol. iv, 1836, 

 p. 177 (not pi. 21. fig. 1). 



Cypris vcddensis, Eomer,Yerst. norddeutsch. Oolithengebirg. 1839, 

 p. 52, pi. 20. fig. 20 {G. punctata, Forbes). 



Cypris valdensis, Dimker, Monogr. nordd. Wealdenbild. 1846, 

 p. 59, pi. 13. fig. 29 (copied from Sowerby's figure ?). 



Cypridea valdensis, Jones in Morris's Catal. Brit. Foss. 2nd edit, 

 1854, p. 104. 



Cypridea valdensis, Huxley & Etheridge, Catal. Foss. Mus. Pract. 

 Geol. 1865, p. 254, 270. 



Cypridea valdensis, H. Woodward, Catal. Brit. Foss. Crust. 1877, 

 p. 89. 



Cijpridea valdensis, Jones, Geol, Mag. 1878, p. 109, pi. 3. fig. 11 

 (not fig. 13-15). 



Largest specimen 1^ mm. long (Wealden). Largest Purbeck 

 specimen IJ mm. 



J. De C. Sowerby's original figure and description in tbe • Mineral 

 Concbology ' give very satisfactorily the shape and main characters 

 of this species, although it often attains somewhat more bulky 

 proportions. As noticed by Sowerby and Fitton, it is very plentiful 

 in many of the true Wealden strata. They thought that they 

 found it also in several of the Purbeck beds ; but in this they 

 were certainly mistaken, for Fitton's labels (in the Geol. Soc. 

 Museum) show that he mistook C. purheckensis and C. punctata for 

 it. In one of the Purbeck beds, however, there are some few speci- 

 mens, large, smooth, and elegantly shaped, quite difierent from the 

 thicker and coarser G. punctata, which has often been mistaken for 

 it. The stratum referred to is the Chert Bed of the Middle Purbeck, 

 Eidgway, in which occur — 



Cypridea valdensis. Metacypris Forbesii. 



punctata (rare). Chara, seed-vessel. 



Darwiaiila leguminella. Fishbone, &c. 



There are also some doubtful instances of its occurrence in the 

 deep " Purbecks " of Mid-Sussex. 



2. Cypridea punctata (E. Forbes). 



[Only the insides of valves are figured in PI. VIII. figs. 4 & 5 ; 

 the outsides resemble figs. 1-3, 6, 8 in shape, without their varietal 

 and distinctive features.] 



Cypris punctata, Forbes, MS. July 23, 1854. 



Cypris punctata, Forbes in LyeU's Manual of Elementary 

 Geology, 5th edit. 1855, p. 297,' fig. 339 6; id. Elements of 

 Geology, 6th edit. 1865, p. 387, fig. 375 h. 



Cypridea valdensis, Jones, Monogr. Fossil Esth. 1862, p. 127, 

 pi. 5. figs. 26-30. 



Cypridea 2nmctata, Huxley & Etheridge, Catal. CoU. Foss. Mus. 

 P. Geol. 1865, p. 254. 



Cypridea punctata, H. Woodward, Catal. Brit. Foss. Crust. 1877, 

 p. 89. 



