THE 



GEOLOGICAL MAGAZINE 



NEW SERIES. DECADE IV. VOL. I. 



No. VII.— JULY, 1894. 



OK-IG-II^JLXj .A^S-TiaLIBS. 



I. — On Some Fossil Piiyllopoda. 



By Professor T. Eupeut Jones, F.E.S., and Dr. Henky Woodward, F.E.S. 



(PLATE IX.) 



ri^HESE notes on fossil Phyllopods refer to some interesting 

 JL specimens, mostly of PalEeozoic age, which have come to 

 hand since the publication of Part II. of our " Monograph of the 

 British Palgeozoic Phyllopoda" (Palasontographical Society), 1892. 

 Figs. 1 and 2 represent Estherics from the upper part of the great 

 Karoo Formation of South Africa. Figs. 3 and 4 are exposed on 

 a piece of Moffat shale from Dumfries-shire ; and, Fig. 3 being a 

 Discinocaris, it is probable that the two series of abdominal seg- 

 ments, Figs. 4a, 46, may have belonged to that genus. Fig. 5 

 is a Discinocaris of good size, and Fig. 6 an Aptychopsis, both from 

 Moffat. Fig. 7 is a rare Phyllocarid from the Devonian beds 

 (Hamilton series) of Canada. There is also a note on a Nova-Scotian 

 Estheria, without figure. 



1. Estheria Draperi, sp. nov. (PI. IX. Figs, la, lb, Ic.) 



Size : Length of valve, 16 mm. Length of hinge-line, 11 mm. Height, lOJ mm. 



Valves suboblong, straight above, slightly curved below, rounded 

 at the ends ; anterior margin higher and less convex than the 

 posterior. The interspaces on the surface are ornamented with 

 coarse shallow pits, making an obscure reticulation (see Fig. Ic, 

 which was taken from near the edge of the antero-ventral portion of 

 the left valve, lying uppermost). The umbo is just in front of the 

 middle of the hinge-line. 



The left valve, partly preserved and much corrugated, lies on top 

 of a slightly convex mass of dark shale, which represents the major 

 part of the body of the animal. 



In shape this specimen approaches the Permian Estheria exigua 

 of Kussia (Monog. Foss. Estherite, Pal. Soc. 1862, p. 37, pi. i. 

 figs. 22-24) and the recent E. Buhidgei,^ E. Macgillivrayi,^ and 

 E. Dalialacensis ^ ; but has its umbo less forward than either of 

 these. Its ornament approaches that of the last-mentioned species, 

 and also that of E. exigua. 



1 Proc. Zool. Soc. 1862, p. 148, pi. xv. fig. 3. 2 jjj^_ gg. ^ 



^ Proc. Zool. Soc. 1849, Anmilosa, p. 87, pi. xvii. figs. 2-4. 



DECADE IV. VOL. I. — NO. VII. 19 



