142 Mr. F. Chapman on some 
by L. Kolmodin *, Prof. '[. Rupert Jones f, and J. Kiesow f, 
whilst A. Krause has described many forms from a similar 
fauna in the Silurian Drift of N. Germany §. 
Nevertheless the material we possess appears to come from 
an unworked locality, and the Ostracoda and some other 
groups of fossils afford many special points of interest. 
The clay obtained from Mulde is on the horizon of bed ¢ of 
Lindstiém ||, and the fauna agrees with that author’s area 
no. 8, “das centrale Gebiet” J. It agrees with Lind- 
stiém’s statement that it is comparable in age with the 
Wenlock Shale of this country; it is also partly homotaxial 
with the Niagara group of North America, 
The most abundant fossils are the Ostracoda, Polyzoa, 
Brachiopoda, and Pteropoda (Yentaculites). Besides these 
there are specimens representing two genera of Foraminifera, 
some tubicolar Annelids, and a few fragments of Crinoids 
and Trilobites. The matrix is a soft pale bluish clay, which 
is as easily washed down as a Tertiary clay, and the fossils 
contained in it are excellently preserved. 
PROTOZOA. 
Clas RHIZOPODA. 
Order FORAMINIFERA. 
Family Astrorhizide. 
Subfamily Raappauurnive. 
HYPERAMMINA, Brady [1878]. 
Hyperammina ramosisstma, sp.n. (PI. IIT. fig. 1.) 
Test adherent, white, finely arenaceous ; consisting of a 
flattened tube, with widely divergent branches, obscurely 
* «Bidrag till kainnedomen om Sverges Siluriska Ostracoder’ (Upsala, 
1869); also, ‘ Oversigt Kongl. Vetensk.-Ak. Férhandlingar,’ 1879, no. 9, 
pp. 183-159, pl. xix. 
tT ‘Notes on some Silurian Ostracoda from Gothland’ (Stockholm 
1887); also “ On some Silurian Ostracoda from Gothland,” Ann. & Mac. 
Nat. Hist. ser. 6, vol. i. 1888, pp. 395-411, pls. xxi., xxii. ‘i 
t “ Ueber Gotlandische Beyrichien,” Zeitschr. deutsch. geol. Gesellsch. 
vol. xl. (1888) pp. 1-16, pls. i., i. 
§ Zeitschr. deutsch. geol. Gesellsch. vol. xliii. (1891) pp. 488-521 
vol. xliv. (1892) pp. 883-399. : 
| ‘* Ueber die Schichtenfolee des Silur anf der Insel Gotland,” Neues 
Jahrb. 1888, vol. i. pp. 147-164. 
{| Op. cit. pp. 154-156. 
