Trof. T. R. Jones — On some Paleozoic Phyllopoda. 349 



4. triastca (Reuss.) Shield oval. 



5. sp. nov ,, obovate. 



6. conffener (Clarke) ,, oblong. 



7?ffiffas,R.W „ ? 



2. Spathiocaris, Clarke, 1882. Cephalic notch narrow. 



1. Emersonii, Clarke Shield oblong. 



• 1*. ? small form ,, obovate. 



2. ungulina, Clarke ,, oval. 



3. Pholadocaris, H. "Woodward, 1882. Cephalic notch broad ; shield having 



radiate furrows and ridges. 



1. Leeii, H. W Shield cuneiform. 



2. sp. nov ,, obovate. 



2. Posterior margin angular ; shield with radiate ridges ; nuchal suture rounded. 



4. LiSGOCARis, Clarke, 1882. 



1. Lutheri, Clarke Shield subpentagonal. 



3. Posterior margin entire ; shield not ridged ; nuchal suture rounded. 



6. Ellipsocaris, H. "Woodward, 1882. 



\. Petvalquei, H. W Shield oval. 



2. sp. nov ,, obovate, 



4. Posterior margin truncate, indented, or slightly notched. 



6. Cardiocaris, H. Woodward, 1882. Posterior margin truncate or indented ; 



nuchal suture angular. 



1. Roemeri, H. W Shield narrow obovate. 



2. bipartita, H. "W ,, ,, ,, 



3. Veneris, H. W ,, broad ,, 



4. Koeneni, Clarke ,, ,, ,, 



5. Posterior margin deeply notched ; nuchal suture angular. 



7. Dipterocaris, Clarke, 1883. Concentric ornament. 



1. pes-cerv(B, Clarke Shield obovate.^ 



2. ■yeiewto, d'Arch. et de Vern ,, ' ,, 



3. procne, Clarke , ,, subquadrate. 



4. pennce-dcedali, Clarke „ suboblong. 



5. P i her idgei, nobis ,, oval. 



8. Pterocaris, Barrande, 1872. Eadiate ornament. 



1. Bohemica, Barr. 



9. Crescentilla, Barrande, 1872. Smooth. 



1. pugnax, Barr. 



II. Sutured along the back. 



10. Aptychopsis, Barrande, 1872. Nuchal furrow angular. 



1. prima, Barr Shield obovate. 



1* vav. secunda,no\ ,, round. 



2. Wilsoni, H. "Woodward ,, ,, 



3. Lapworthi, H. W ,, obovate. 



4. glabra, H. "W ,, round. 



5. sp. nov ,, obovate. 



6. sp. nov. , ,, obovate. 



7. Salteri, H. W ,, ovate. 



8. sp. nov ,, oblate. 



11. Peltocaris, Salter, 1863. Nuchal furrow rounded. 



1. aptychoides, Salter Shield oval. 



2. ? anaiina, Salter ,, ? ■ 



3. sp. nov ,, oblate. 



4. sp. nov ,, oblate. 



5 ? Harknessi, Salter ,, ? 



1 The measurement for the shape is taken as an outline all round the shield by its 

 general contour outside both the notches. 



