On the Palceozotc Bivalved Entomostraca. 



177 



XXV. — Notes on the Palceozoic Bivalved Entomostraca, — 

 No. XXIII. On some Silurian Genera and* Species'^ 

 {continued). By Prof. T. Rupeet Jones, F.R.S., F.G.S. 



[Plates IV., v., VI., VIT.f] 



Contents. 



Introduction, p. 177. 7. 



I. Macroci/pris, p. 178. 



1. Vinei, sp. uov., p. 179. 



2. eleqans, sp. nov., 8 



p. 180. ■ 



.3. siliquoides, sp. nov., 9. 



p. 181. 



4. symmetrica, sp. nov., 10. 



p. 181. 11. 



5. ? alta, sp. nov., p. 181. 



6. ?cr«.ss«/'fl,sp.nov.,p.l81. IV. 



II. Fo>ifoci/pris, p. 182. 1. 



1 , Mtnvii, sp. nov. et var. 2. 



ffibbera, nov., p. 182. S. 



2. Smithii, sp. nov., p. 184. 



III. Bythocypris, p. 184. V. 



1 . Hullii, sp. nov., p. 184. 1. 



2. ? reniformis, sp. nov., 



p. 185. VI. 



3. ? hotelloides, sp. nov., 1. 



p. 185. 



4. testaccUa, sp. nov., 2. 



p. 180. VII. 



5. synjmetrica, STp.nuv.et VIII. 



vai". a, b, c, p. 186. 

 6. concinna, sp. nov. et IX. 



var. ovalis, p. 186. 



Bythocyiwis Phillipsiana, J 



& H., et var. major, nov. 



p. 187. 

 pustulosa, sp. nov. 



p. 188. 

 ? semimdum, sp. nov. 



p. 188. 

 acina, sp. nov., p. 189 



pJiatseolus, sp. nov. 



p. 189. 



Cythere, p. 189. 



Hollii, sp. nov., p. 190. 



? Vinei, sp. nov., p. 191. 



? siibquadrata, sp.nov., 



p. 191. 

 Cijtherella, p. 192. 



Smithii, sp. nov, et 



var., p. 192. 



Primitia, p. 193. 



punctafa, sp nov., 



p. 193. 



valida, J. & H., p. 193. 



Incerta; sedis, p. 193. 

 Note on Dr. Lindstrom's 



Collection, p. 194. 

 Explanation of the Plates, 



p. 194. 



Introduction. 



M pp. 343, 344, Ann. & Mag. Nat. Hist, for April 

 1886, is a full account of the history of the valuable collec- 

 tions of Silurian Ostracoda which have been described 

 in part by the late Dr. Harvey B. HoU and myself. 

 Some of the Beyrichim and their allies were treated of and 

 figured in the same number of the Ann. & Mag. Nat. Hist, 

 and others in the number for last May, pp. 403-414, with 

 further illustrations. I have now to continue the work with- 

 out the aid of our lamented friend, except so far as many 

 valuable drawings prepared by him, some indeed within a 



* For No. XXII. see Ann. & Mag. Nat. Hist, for October 1886, p. 249. 



t These Plates have been drawn with the aid of a grant from the 

 Royal Society for the illustration of Fossil Entomostraca. Mr. C. D, 

 Sherborn has kindly given me help in cataloguing, comparing, sketching' 

 and measuring the species. 



