Lower- Oarboniferous Entomostraca. By T. R. Jones. 325 



17. T. Kenebs. Tuedian. 



18. V. Tweed. Tuedian. 



19. W, Edington Mill. Tuedian. 



20. X. Burnmouth. Tuedian. 



21. Z. Hutton, &c. Tuedian. 



6. LEi'ERDiTiASUBBasCTA(Portlock)... 3. C. Tweedmouth. M.-L. group 



(low down). 



7. Beteichia CEiNiTA, J. & K 2. B, Alnwick Moor. M.-L. group 



(low down). 



8. KiEKBYA SPiEALis, J. & K 3. 0. Tweedmouth. M.-L group 



(lower part). 



9. Cythekella Tatei, Jones 11. M. Lamberton. M.-L. group 



(lowest part). 

 8. H. ? Howick. M.-L. group 

 (middle part). 



10. EsTHERU STRUTA (Miinster), var. 



Tateana, Jones 1. A. Estherian Shale ; Lamberton, 



M.-L. group (lower part). 



11. EsTHERU TENELLA (Jordan). 2. B. Alnwick Moor, M.-L. group 



(low down). 



APPENDIX. 



Dar-winella? Beeniciana, sp. nov. 



PI. II., figs. 4a, 4b, 4c. 



Valves small (-5 mm. long), smooth, elongate, with rounded 

 ends, one (anterior) narrower and more compressed than the 

 other ; the carapace almost cylindrical, but tapering anteriorly ; 

 blunt or truncate behind. 



This little Cytheroid occurs in great numbers, and in good 

 preservation (valves united), with the JBernix Tatei found by 

 Prof. Lebour (see above, page 319). It resembles some small 

 Entomostraca commonly associated with certain coal-seams in 

 Scotland ; and more particularly it approaches Cythere (Darwin- 

 ella?) pungens, J. & K. ("Trans. Geol. Soc. Glasgow," vol. ii., 

 1867, p. 222; referred to Carbonia in the "Ann. Mag. N. H." 

 ser. 5, vol. v., p. 37); but it is blunter at the ends and more 

 cylindrical. 



Dr. G. S. Brady has suggested (see above, p. 319) the alliance 

 of this minute species with his Darwinella, which is fully 

 described and illustrated in the " Monogr. Post-tertiary Entomo- 

 straca," Pal. Soc, 1874, pp. 440, 441 ; and the estuarine habitat 

 of this genus is in accordance with the probable habitat of the 

 Carboniferous specimens. I have already pointed out another 

 such probable Darwinella in the fossil state, as occurring in the 



