Vol. XXVII. 

 iqio 



] Chapman, Silurian Fossils of SoiUli Yavra, &c. 69 



CEPHALOPODA. 



Y. D. Orthoceras, sp. 



Y. D. Protohactrites, sp. 



Y. D. Cycloceras bullatum, Sowerby, sp. 



Ref.— M'Coy ('79), p. 26, p). LVIL, fig. 4. 



This species was originally identified by M'Coy in mudstone 

 from a cutting at Johnston-street, Collingwood, and in sandy beds 

 from hills in the township of VVhittlesea. Its range in Britain is 

 from the Upper Llandovery to Upper Ludlow. 

 Y. Bawsonoceras, sp. 

 Y. Kionoceras, sp. 

 Y. Ooceras, sp. 



TRILOBITA. 



Y. Cyphaspis sj^ryi, Gregory. 



Ref.— Gregory (01), p. 179, pi. XXIL 



The type specimen was found by Mr. Spry in yellow mudstone 

 about two chains east of the Botanical Bridge, South Yarra. 

 Y. D. Encrinurus, sp. 

 Y. Odontojyleura bowningensis, Eth. fil. and Mitch. 



Ref. — Etheridge and Mitchell ('97), p. 696, pi. L.. figs. 1-3; 

 pi. LIL, fig. 5- . . 



This species was originally described from the Bowning series 

 ( Lower Trilobite bed), of Bowning Creek, N.S.W. 

 Y. Homalonotus harrisoni, M'Coy. 



Ref.— M'Coy ('76), p. 19, pi. XXIIL, fig. 11. 



Also found at Moonee Ponds Creek. 

 Y. Proetus, sp. 

 Y. Ampyx, sp. 



CIRRIPEDIA. 



Y. Turrilepas ornatus, Chapm. 



Ref.— Chapman ('10), p. 106, pi. XXVIIL, fig. i ; pi. XXIX., 

 fig. 2. 



An extinct form of barnacle, having a conical body covered 

 with overlapping plume-like plates, generally with a median fold. 

 This species is also found in beds of the same age at Yan Yean. 



PHYLLOCARIDA. 



Y, — Ceratiocaris pinguis, Chapm. 



Ref. — Chapman ('10), p. 107, pi. XXVIIL, figs. t,-^^. 

 Y. Ceratiocaris, cf. pardoeariay Jones and Woodward. 



Ref. — Chapman ('10), p. 109, pi. XXVIIL, fig. 6. 

 Y. Xiphidiocaris falcata, Chapm. 



Ref. — Chapman ('10), p. no, pi. XXVIIL, figs. 7, "ja-d. 



EURYPTERIDA. 



Y. D. Pteryyotihs australis, M'Coy. 

 Ref. — M'Coy ('99), p. 193, text-figure. 

 Since the discovery of the original type (fragment of a somite), 



