142 Mr. F. Chapman on some 



by L. Kolniodin *, Prof. T. Rupert Jones t, and J. Kiesow |, 

 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 afTord many special points of interest. 



The clay obtained from INIulde is on the horizon of bed c of 

 Lindstiom ||, and the fauna agrees with that author's area 

 no. 3, "das centrale Gebiet " ^. It agrees with Lind- 

 stiom's statement that it is comparable in age with the 

 AYenlock Shale of this country ; it is also partly homotaxial 

 with the Niagara group of North America. 



Tiie most abundant fossils are the Ostracoda, Polyzoa, 

 Brachiopoda, and Pteropoda {Tentacul'iles) . 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. 



Class RHIZOPODA. 



Order FORAMINIFERA. 



Family Astrorhizidae. 



Subfamily Rsabdamminin^. 



Hyperammina, Brady [1878]. 



IJyperammina ramosissima, sp. n. (PI. III. fig. 1.) 



Test adherent, white, finely arenaceous ; consisting of a 

 flattened tube, with widely divergent branches, obscurely 



* ' Bidrag till kannedomen om Sverges Siluriska Ostracoder ' (Upsala, 

 ]869); also, ' Oversigt Kongl. Vetensk.-Ak. Forliandliugar,' 1879, no 9, 

 pp. 13.3-139, pi. xix. 



t 'Notes on some Silurian Ostracoda from Gothland' (Stockholm 

 1887) ; also " On some Silurian Ostracoda from Gothland," Ann. & Mao'' 

 Nat. Hist. ger. 6, vol. i. 1888, pp. 395-411, pis. xxi., xxii. °" 



X " Ueber Gotiandische lie} riehien," Zeitscbr. deutsch. geol. Gesellsch. 

 vol. xl. (1888) pp. 1-16, pis. i., ii. 



§ Zeitscbr. deutscb. geol. Gesellscb. vol. xliii. (1891) pp. 488-521 

 vol. xliv. (1892) pp. 383-399. 



II " Ueber die Scbicbtenfolge des Silur aiif der Insel Gotland," Neiies 

 Jahrb. 18^8, vol. i. pp. 147-164. 



^ Op. cit. pp. 154-156. 



