530 Jones and Woodward—Fossil Phyllopoda. 
Palewont. Soc. 1862, p. 25, pl. 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 Hstheria striata, this 
has a straighter back than shown in the figures given by Goldfuss 
and De Koninck, and a sharper postero-dorsal angle than seen in 
any of the published figures. We may mention that fig. 8, pl. 1, 
Monogr. Foss. Esther., is less oblong than the original figures 
referred to above, and is deeper (higher) posteriorly ; fig. 9 is more 
truly oblong; figs. 11 and 13 are more oblique, sloping posteriorly ; 
fig. 15 is oblique, but shorter than figs. 11 and 138; and fig. 18 is 
shorter and subquadrate. 
The indications of interstitial ornament are feebly evident in some 
of those mentioned above, and we cannot find any in these now 
under examination. 
Differing from the foregoing varieties it should be regarded, we 
think, as another variety, which we wish to specialize as Hstheria 
striata, var. Muensteriana, thus naming it after Count Minster, who 
was one of the earliest observers of these Paleeozoic Phyllopods and 
of other fossil bivalve Hntomostraca. 
In its postero-dorsal angle and long hinge-line this form much 
resembles the recent Hstheria Rubidgei, Baird (Proceed. Zool. Soc. 
1862, pl. 15, fig. 3). 
Fig. 1 illustrates the two valves lying together on the matrix, and 
in Wig. 2 the left valve is seen without any perspective. 
It is in bluish-grey Lebach Shale of the lower part of the 
Rothliegende (Permian), at Altenstadt in the Wetterau, Grand 
Duchy Hessen, where it was discovered by Herr von Reinach with 
other fossils, namely, Xenacanthus Decheni, Goldfuss; Acanthodes, sp. ; 
Branchiosaurus amblyostomus, Credner (Protriton petrolei, Gaudry), 
and some of the leading plants of the Permian series. 
In these Lower Lebach Shales from Altenstadt, Wetterau, A. von 
Reinach also found numerous small Ostracodes, which T. R. Jones 
and J. W. Kirkby have determined as :— 
Leperditia Okeni (Munster), very common. 
. acuta, J. ; 
29 var. aeuta,\) and K less common. 
ap »> 9» Oblonga, J. and K. 
% DOO Pande Kenmare = 
ar Youngiana, J. and K., rare. 
Cythere superba? J. and K., common. 
Buirdia? ete. 
The series of formations yielding these Phyllopoda and Ostracoda 
have been especially studied of late years,’ and belong to the 
Rothliegende of the Permian system of the Middle Rhine, Main, 
and Wetterau (equivalent to that of the Nahe and Saxony). 
1 See Ch. E. Weiss, Fossile Flora der jungsten Steinkohlenformation und des 
Rothliegenden im Saar-Rhein-Gebiete, 1869-72, p. 6; Kayser’s Lehrbuch der 
geologischen Formationskunde, 1891, p. 149; and A. von Reinach, ‘Das Rothliegende 
in der Wetterau und sein Anschluss an das Saar-Nahegebiet’; Abhandl. Konigl. 
Preuss. geol. Landesanstalt, neue Folge, ett 8, 1892, p. 3. 
