66 DEPORT — 1889. 



(for 1888). Uufortunately it is badly preserved and not quite per- 

 fect. 



XI. Discinocnris. — Discinocaris gigas, H. W., was referred to in our 

 Second Report (for 1884), as having possibly a diameter of seven inches. 

 Mr. James Dairon, F.G.S., of Glasgow, has sent us a careful sketch of a fine 

 specimen of this Discinocaris, found by Mr. William Brown (of Birkhill, 

 Dumfriesshire) in the graptolitic shales of Dobbs Linn, Moffat. It has 

 somewhat the outline of the bottom of a horse's hoof, boldly curved ou 

 one edge, and broadly indented with a shallow triangle on the other. 

 It has been much more convex than it is now, being somewhat crushed, 

 and radiately cracked towards the curved margin. It measures about 

 3 inches (73 centimetres) transversely from one side of the curve to the 

 other, and about 2 inches (5^ centimetres) from the apex of the trian- 

 gular indentation to the opposite edge. 



XII. Es{liena and Estheriella. — l. In his memoir on the Fauna of the 

 Devonian system in North-western and Central Russia (in Russ and 

 German), 8vo., St. Petersburg, 1886, pp. 223,224, P. K Wenjukoff gives 

 an account of the EstJieria memhranacea (Pacht) and its synonymy. 



2. Ludwig's CijcJas ohuncula in his memoir on ' The Freshwater Shells 

 of the Coal-formation of the Ural,' 1861, in the ' Palisontographica,' 

 vol. X., p. 23, pi. 3, figs. 3 and 3a, is probably an EstJieria,^ from the 

 Permian or Permio-Carboniferous bituminous marl with Aiithracomija (?) 

 Uralica (Ldwg.) and A. (?) ohslijui (Ldwg.), on the left bank of the 

 Uswa, near Nischni Parogi, in the Government of Perm. It is referred 

 to, with a wrong reference, by P. Kratow in the 'Memoires du Comite 

 Geologiqne,' St. Petersburg, 1888, vol. vi., Lief. 2, p. 510. 



3. In his ' Geologische Forschungen am westlichen Ural- Abhange in den 

 Gebieten von Tscherdyn und Ssolikamsk ' ; ' Memoires du Comite Geo- 

 logiqne ' ; St. Petersburg, vol. vi., Lief. 2, 4to., 1888, Herr P. Kratow 

 describes and figures the following Palaeozoic Phyllopods : — Estheria sul- 

 concentrica, nov., pi. 2, fig. 26, pp. 469 and 556 ; Estheriella trapezoidalis, 

 nov., fig. 27, pp. 469 and 557 ; EstJieriella oUonga, nov., fig. 28, pp. 

 470 and 557, from the Permio-Carboniferous formation of the west side 

 of the Ural (Districts of Tscherden and Ssolikamsk) ; and from the 

 Permian formation of the same region : Estheria, sp., pi. 2, fig. 25, pp. 

 510 and 559 ; Estheria, sp., pp. 511 and 559. 



4. In 1875 Herr Weiss described Estheriella as being like Estheria, 

 but bearing radial riblets (6-12 in number), ' Zeitsch. d. G. Gesell.,' vol. 

 xxvii., 1875, pp. 711, 712. Estheriella lineata and costata are his types, 

 both from the Lower Buntersandstein of Durrenberg, Saxony. See 

 also Zittel's ' Handbuch der Palseontologie,' &c., p. 560, vol. i., part 2, 

 No. 4 (vol i.. No. 8), 1885. 



5. Figures and descriptions of Estheria functateUa, Jones, from the 

 Glasgow Coal-field, and some allied forms, including an Estheriella from 

 the same Carboniferous series, are being prepared for publication. 



XIII. Biheiria.—ln the ' Geol. Mag.', vol. i. (1864), p. 12, Mr. Salter 

 stated that Biheiria pholadiformis, Sharpe, ' Quart. Journ. Geol. Soc.', 

 vol. ix., pp. 157-8, pi. 9, fig. 17, may very possibly be a bivalved crus- 

 tacean belonging to the same group (Phyliopod) as that to whicli his 

 Myocaris ^ (' Geol. Mag.', he. cit.), p. 11, belongs. 



' For other Palaeozoic EsfJieria; see out Fiith Keport (for 1887), pp. G8, 69, and 

 Sixth Report (for 1888), p 181. 



2 Catalogued as a Fhyllopodous Crustacean in our First Keport (1883), p. 217. 



