ON THE FOSSIL PHYLLOPODA OF THE PAL-^OZOIC ROCKS. 



465 



The Fossil Phyllopoda of the Palmozoic Rocks. — Tenth Report of 

 the Committee, consisting of Professor T. Wiltshire (^Chair- 

 man), Dr. H. Woodward, and Professor T. Eupert Jones 

 {Secretary). (Draivn up by Professor T. Eupert Jones.) 



[PLATE I.] 



Contents. 



I. Phylloearida, from North Wales. 

 II. Estlterire, from the Wetterau and 

 the Nahe, Germany : 



1. JSstheria striata (IMiinster), 



var. Muensieriana, nov. 

 figs. 1 and 2. 



2. E. ReiiMchii, sp. nov., fig. 3. 



3. E. Geinitzii, sp. nov., fig. 4. 



4. E. — ,\&r.Grebeana,nQy.,fig.5. 



III. Estliena, from Bohemia. 



IV. Phyllncarida, from Iowa and 



Indiana. 

 V. Anovialoearis, from Canada. 

 VI. Caryocaris Salteri, from Australia. 

 VII. Aptychopsis anatina (Salter) and 

 Peltocaris 3farrii, sp. nov. 

 VIII. Geological Distribution of the 

 Palifiozoic Peltate Phyllopoda. 



I. The Phylloearida, from North Wales, referred to in the last report 

 (for 1892, p. 299) as having been lent by Mr. G. J. Williams, F.G.S., of 

 Blaenau-Ffestiniog, have been duly examined, and several described and 

 figured, together v^ith some other specimens, in the ' Geological Maga- 

 zine ' for May, 1893, pp. 198-203, plate 10, by T. R. Jones and H. Wood- 

 ward. These comprise Peltocaris Salteriana, sp. nov. (fig. 1), Diptero- 

 carts Etheridgei, J. and W., 1884 (fig. 3), Aptychopsis Williamsii, sp. nov. 

 (fig. 7), Ceratioearis insperata, Salter, 1866 (figs. 8 and 9) ; besides a 

 fragment? (fig. 6), an undetermined specimen (cut, p. 203), a Conularia 

 (fig. 2), and twoMytiloid shells (figs. 4 and 5). 



The other specimens were : — 



Hymenocaris vertnicauda (Salter). Four pieces from the Middle Lin- 

 gula-flags at Borth, and (Middle ?) in the cutting near Wern ; and (not 

 rare) from the Upper- Tremadoc beds at Garth Hill ; all near Portmadoc. 



Saccocaris major (Salter). Small individual from the Upper Tremadoc 

 at Tuhwnt i'r Bwlch. 



Idnguloearis siliquiformis (Jones). From the Upper Tremadoc, at 

 Garth Hill. 



II. Several Estherice, from the Permian strata of Germany, submitted 

 for examination by Baron Albert von Reinach, of Frankforfc-on-the-Main, 

 prove to be — 



1. Estheria striata (Miinster), var. Muensieriana, nov., Plate I., 

 figs. 1, 2. 



Length, 3"66 mm. ; hinge-line, 2'46 mm. ; height, 2'0 mm. 



Near to the var. Beinertiana, Jones ('Monograph Fossil Estherice,' 

 Paljeont. Soc, 1862, p. 25, pi. 1, figs. 11-14), but more angular and 

 sloping posteriorly, and not nearly so truncate on that border as in var. 

 Binneyana, Jones, loc. cit., fig. 9 ; nor rounded, as in var. Tateana, Jones, 

 loc. cit., figs. 15 and 18. 



Like the before-mentioned varietal forms of Estheria striata, this has a 

 straighter back than shown in the figures given by Goldfuss and De Ko- 

 ninck, and a sharper postero-dorsal angle than seen in any of the published 

 figures. We may mention that fig. 8, pi. 1, ' Monogr. Foss. Esther.,' is less 



1893. H H 



