ON TIIE FOSSIL rilYLLOrODA OF THE I\U..KOZOIC ROCKS. 



75 



[Two other Reports read in Section B, having been unavoidably delayed, 

 will be found immediately before the Papers printed in extensoJ] 



Second Report of the Committee, consisting of Mr. R. Etheridge, 

 Dr. H. Woodward, and Professor T. Rupert Jones (Secretary), 

 on the Fossil Phyllopoda of the Palaeozoic Rocks. 



In our former Report (1883) we offered a Synopsis of the known genera 

 of the Fossil Phyllopods, and we have not found reason to modify the 

 classification there proposed, as far as the univalve genera are concerned, 

 except (1) that the term 'flat-shield' is incorrect for a group in which 

 several forms are slightly convex or subconical ; (2) that one (Dip- 

 terocaris) is bent along the back in a ridge-like manner; (3) possibly 

 Pinnocaris is really bivalved, without a rostral piece, and not merely 

 sutured along the back ; (4) probably Crescentilla may be placed near 

 Pteroearis and Dipterocaris. Last year we ofl'ered observations on some 

 genera that have bent or folded carapaces (Hymenocaris), and on some 

 that are bivalved (Caryocaris and Idngulooaris) ; but we have now to take 

 up the flat-shielded or subconical forms, excepting the Dithyrocarides. 



Examining all the species of which specimens or figures are within 

 reach, we find the following genera and species ; and we have briefly 

 described or re-described them on one uniform plan, so that comparison 

 may be the more easily made. 



List of the Secies of the Fossil Univalved Phyllopoda 



(EXCEPTING DlTHYKOCARls). 

 I. Shield not sutured along the had-. 



1. Posterior margin entire. i 2. 



1. Discinocaris, H. Woodward, 1866. 



1 . Browniana, H. W. | 6. 



2. dubia, F. A. Roeiner. 

 ::. lata, H. W. 



4. triasica, Reuss. 



5. sp. nov. 

 (i. congener, Clarke. 

 7. ? gigas, H. W. 



2. Spathiocaris, Clarke, 1882. 



1. Emersonii, Clarke. 



2. vmgulina, Clarke. 



3. Fholadocaris, H. Woodward, 1882. 



1. Leeii, H. W. 



2. sp. nov. 



4. Lisgocaeis, Clarke, 1882. 



1. Lutheri, Clarke. 8. 



5. Ellifsocaris, H. Woodward, 1 8S2. 



1. Dewalquei, H. W. \ 0. 



2. sp. nov. 



Posterior margin, truncate, indented, 

 or slightly notched. 



Cardiocaeis, H. Woodward, 1882. 



1 . Roemeri, H. W. 



2. tripartita, H. W. 

 .'!. Veneris, H. W. 

 4. Koeneni, Clarke. 



3. Posterior margin deeply notched. 



Dipterocaeis, Clarke, 1883. 



1. pes-cerva3, Clarke. 



2. vetusta, d'Arch. & de V. 



3. procne, Clarke. 



4. penn;e-daedali, Clarke. 



5. Etberidgei, nobis. 

 Tterocaeis, Barrande, 1872. 



1 . boliemica, Barr. 

 Ckescentilla, Barrande, 1872. 

 1. pugnax, Barr. 



