FROM KOZUKE, KIT, AWA, AXD TOSA. ')^i 



(Uih'rior portion of tlw veiifnil ninnjiii. flu' jwstt'rior part of flif latter ohJimie- 

 hj aso'irh'ini to tlic slr(i/(iht posterior u\arijiii, diid I'nrinimj at the point of 

 junction II rointiJe.l (onjlc: anterior inanjin truncate, parallel to tlie posterior 

 and at riijlit amjles to tlie dorsal cis u-ell as to tlie anterior portion of tlie 

 rentrai uianjin, so tliat tlie ralres assume a decidehj iptadrate shape; froiri tlie 

 uiuho run tu'o flat diaijojtal edijes, one to tlw postero-rottral a)i(jle and one, 

 n-liicli is flatter tlian tlie other, to tlic middle parr of tlie rentrai marejin^ 

 u'hich at this point ascends haclarards ; surface with ediout tirelre sliort 

 concentric ridijes^ hetween ndiicli there are still finer interstitial lines, fjeneitli 

 7.5 nun. lieiijht 3.0 mm., thicJcncss of the left redre, 2 mm. 



I possess only a single specimen of this species in the form of nn 

 external impression. ]\Iy figure was drawn after a clav r-ast of it. 

 The finr-sided shape and two obliqne edges are characters Avhich 

 remind ns more of the Carboniferous Genus Leaia Jones (A Mono- 

 graph of the Fossil Estlieria?, Appendix, p. 117, pi. I, hg. 10-21. 

 Palseontogr. Soc. London, vol. XY, 1(S62) than any of the hitherto 

 described Esther iœ. 



Loc. — Yuasa. 



