130 BRITISH PALAEOZOIC PHYLLOCARIDA. 



Dithyrocaris, E. Kayser, 1878. ' K. geol. Landes-Anstalt,' vol. ii, Heft 4, p. 7. 

 Rhachnra, Scudder, 1878. ' Proceed. Boston Soc. Nat. Hist.,' vol. xix, 



p. 296. 

 Dithyrocaris, Bigsby, 1878. ' Tbesaur. Dev.-Carb.,' p. 349. 



H. A. Nicholson, 1879. ' Palaeontology, 5 edit. 2, vol. i, p. 349. 



— R. Etheridge, jun., 1879. 'Quart. Journ. Geol. Soc.,' vol. 



xxxv, p. 464. 

 R. P. Whitfield, 1880. < Amer. Journ. Sci.,' vol. xiv, p. 36. 

 T. R. Jones, 1883. ' Geol. Mag.,' dec. 2, vol. x, p. 462. 



— et Argus [-gas~\, Packard, 1883. ' Monogr. North -American 



Pbyllopod Crustacea,' pp. 445 and 452. 

 Packard, 1883. ' American Naturalist,' vol. xvi, p. 946. 

 J. M. Clarke, 1884. ' Neues Jahrb., vol. ii, part 2, p. 184. 

 C. A. White, 1884. ' Thirteenth Report Geol. Nat. Hist. 



Indiana,' p. 178. 



— Etheridge, Woodward, and Jones, 1884. ' Report Brit. Assoc. 



for 1883,' p. 216. 

 Jones and Woodward, 1884. ' Geol. Mag.,' dec. 3, vol. i, p. 348. 



— J. Coutts, 1884. ' Trans. Geol. Soc. Glasgow,' vol. vii. p. 200. 

 Zittel, 1885. ' Handbuch Palaont.,' vol. i, part 2, p. 658. 

 Novak, 1885. Sitzungsb. bohm. Gesellsch. Wissensch.,' p. 344. 

 E., W., and J., 1888. ' Rep. Brit. Assoc, for 1887,' pp. 62—66. 



— and Rhachura, Jones and Woodward, 1888. ' Monogr. Brit. Pal. 



Phyll.,' part 1, p. 2. 

 Etheridge, 1888. ' Foss. Brit. Islands,' vol. i, Palasoz., p. 238. 

 Mesothyra {?), Hall and Clarke, 1888. ' Palasont. New York,' vol. vii, pp. lvi 



and 187. 

 Dithyrocaris, Lesley, 1889. 'Dictionary Foss. Pennsylv.,' p, 212. 



S. A. Miller, 1889. ' North-American Geol. and Palasont.,' p. 545. 

 R. P. Whitfield, 1890. ' Ann. New York Acad. Sci.,' vol. v, 



p. 365. 

 A. W. Vogdes, 1893. ' Bibliogr. Pateoz. Crust.,' p. 382. 

 Mesothyra {?), J. M. Clarke, 1893. ' American Naturalist ' (September), p. 796. 

 Dithyrocaris, J. Neilson, 1894. 'Trans. Geol. Soc. Glasgow,' vol. x, p. 71. 



W. Hind, 1897. ' Monogr. Carbonif. Lamell.,' Pal. Soc, p. 94. 



DriHYROCARis appears to be a Phyllocarid having for the most part a nearly 

 flat or somewhat convex test, subcircular, suboval, or suboblong in shape, com- 

 posed of two subconvex lateral halves or valves, which meet in the middle along 

 the dorsal line at a very obtuse angle in the clypeiform specimens, but at a 



