460 Prof. T. Rupert Jones — On the Pakeozoic Phyllopoda. 



propose that M'Coy's C. elliptica be referred to a new genus under 

 the name Emmelezoe. 1 



E. elliptica, M'Coy, is described in the Third Eeport, p. 27, as 

 represented by the type, Cambridge Mus. &/15 ; but Ludlow Mus. G, 

 and M.P.G. X^o" and ff differ from it considerably. The first of 

 these is shorter and broader (higher), nearly semicircular in outline, 

 with an acute and projecting postero-dorsal angle ; and its surface 

 has a fine, almost silky, linear ornament. As a new species this 

 might be known as E. tenuistriata. The specimen X-iV is subovate, 

 larger than either of the other two, and is coarsely striate, with 

 longitudinal anastomosing wrinklets and might be named E. crassi- 

 striata. M.P.G. tf is smaller than any of the foregoing, somewhat 

 boat-shaped, between the last and elliptica in shape, but not identical 

 with either ; and it is rather coarsely striate longitudinally. To 

 this form we propose to give the name E. Maccoyiana, in honour of 

 the first describer of any member of this genus. 



21. At page 26 of the Third Eeport, we described Salter's Ceratio- 

 caris ? ensis, and now we are still more confirmed in the opinion that 

 it belonged to a distinct genus. Its large size, its curvature, and the 

 serration on both the upper and the lower edge, and the profuse 

 spination (as shown by pits) on the latter distinguish it from other 

 telsons ; and more particularly its lozenge-shaped sectional area, of 

 an unequal rhombic form, blunter at the outer (upper) and convex 

 edge than on the other, the ridge along the sides not being quite on 

 the medial line, but nearer the outer than the inner edge. We pro- 

 pose the name Xiphocaris 2 for this rare genus. 



M. Barrande's Ceratiocaris primula (Third Eeport, p. 32) has a 

 style (or stylet?) with lozenge- or diamond-shaped section; but this 

 uropod, though curved, is of different dimensions, and is pitted 

 all over. 



22. Physocaris vesica, Salter (Third Eeport, p. 28) we consider 

 as having had its abdominal segments shifted from below upwards, 

 and turned over on their axis, after death ; and therefore as having 

 been figured upside down. 



23. Of C. ? lata, insperata, and perornata we have no further 

 evidence at present. 



24. Ceratiocaris ? longicauda, D. Sharpe (Third Eeport, p. 29), 

 a foreign (Portuguese) form within our reach has been studied in 

 the Geological Society's Museum, Burlington House, and shows some 

 interesting features. Its scientific name was given under the suppo- 

 sition that the fossil was a Dithyrocaris, with a longer abdomen than 

 usual ; but its cylindrical ultimate segment, its somewhat bayonet- 

 shaped style, and blade-like stylets clearly remove it from that 

 genus, as intimated in our former notice. It is probably distinct 

 also from Ceratiocaris ; it has some analogy with the Devonian 

 Elymocaris ; but at present we cannot fix its generic place. 



25. In the Sitzungsb. K. bohm. Ges. Wiss. 1885, M. Ottamar 

 Novak, Keeper of the Barrande Collection at Prague, has described 



1 'ErtueA^s, elegant ; fal\, life (a termination common in some of M. Barrande's 

 genera). 2 g i'$os, a sword ; napis, a shrimp. 





