244 H. Woodward — On a new Silurian Star-fish. 



The following is a list of the known genera and species of fossil 

 star-fishes (Asteriadce and OpMuridoe) , from the Silurian, roeks, with. 

 a reference to their authorities, formation, and locality : — 



I. Edrioaster Bigshyi, Billings, Trenton L. Ottawa City, Canada West. 



II. Eugaster Loc/ani, Uall, 1866. Twentieth Eeport on the State Cabinet, 



New York, p. 10, pi. 9, fig. 7. Hamilton Group, Madison 

 County, New York. 



III. 1. Glyptaster Irachiatus, Hall, Silurian (several stages), New York. 



2. ,, inornatus. Hall, Niagara Group, Indiana. 



3. „ occidentalis, Hall, ,, „ 



4. ,, pentangularis. Hall, ,, ,, 



IV. Lepidaster Grayi, Forbes, Memoirs Geol. Surv., Dec. 3. 1850. U. Silurian, 



Dudley. 

 V. I. Palceaster asperrima, Salter, 1857. Ann. and Mag. Nat. Hist. 2nd series, 

 Vol. XX. p. 325, pi. ix. fig. 1. Caradoc, or Bala Sandstones, 

 near Welchpool, N. Wales. 



2. „ {Uraster) obtusa, Forbes. Mem. Geol. Surv., 1849. Decade 1, 



pi. i, fig. 3. Caradoc, Drumcannon Waterford Bala Eocks, 

 Moel-y-Garnedd. 



3. „ coronella, Salter. 1857. Ann. and Mag. Nat. Hist. op. cit. p. 326. 



May Hill Sandstone. Malvern. 



4. „ {Uraster) Buthveni, Forbes, 1849, op. cit. Decade 1, pi. i. fig. 1. 



Ludlow Rocks, Kendal, Westmoreland. 



5. „ hirudo, Forbes, 1849, loc. cit. pi. i. fig. 4. Ludlow Eocks, 



Kendal, Westmoreland. 



6. „ Niagarensis, Hall, Paleeontology of New York. Trenton Lime- 



stone. New York. 



7. „ (Asterias) matutina, Hall, Palaeontology, New York. Vol. i. 



p. 91, pi. xxix. fig. 5. Twentieth Report of State Cabinet, 

 1866. p. 3, pi. ix. fig. 2 (syn. Petraster rigidus), Trenton 

 Limestone. Trenton Falls. 



8. „ Palaaster Sh.(pffe.ri, Hall ; 20th Eeport, 1866, p. 4, pi. ix. fig. 1. 



Shales of Hudson River Group, Cincinnati, Ohio. 



9. .„ granulosa, Hall ; 20th Report, 1866, p. 5. Same formation as last 



species. 



10. „ {Petraster) Wilberanus, Meek and Worthen, Proceeds. Acad. Nat. 



Soc, Philadelphia, 1861, p. 142 ; Hall, 20th Report, 1866, p. 5. 

 Lr. Silurian, Oswego, Kendall Co. Illinois. 



11. „ (Astei'ias) antiquata, Locke, Proceeds. Acad. Nat. Soc, Philadel- 



phia, 1?46, vol. iii. p. 35. Hudson's River Group. Cincinnati. 



12. „ Jamesii, Dana, sp. U". P. James, Acad. Nat. Soc, 1841. American 



Journ. Soc, vol. i. p. 441. Dana, American Journ. Soc. (n. s.), 

 vol. 35. p. 295. Hudson's River Group, Cincinnati. 



13. „ antiqua, Troost, sp. 1835. Hall, 20th Report on State Cabinet, 



1866, p. 7. Hudson's River Group, Harpeth River, Davidson 

 County, Tennesse. 

 14 „ eucharis, Hall. 20th Report, 1866, p. 7, pi. ix. fig. 3. Hamilton 



Group, Hamilton, Madison Co., etc, etc. 



15. „ constellata, Thorent, Lower Green Schists, Lower Silurian, 



Mondrepuis, Aisne, France. 



16. „ imhricaia, Salter, n. sp. Caradoc. Llanfyllin, Montgomeryshire, 



Wales. 



17. „ parviuscula, Billings, Clinton Group, Arisaig, Nova Scotia. 



18. ,, pygmcBa, Eichwald, Lower Silurian, Pulkowa, Russia. 



VI. 1. Palasterina antiqua, Hisinger, Lethsea Suecia, p. 89, t. 26, fig. 6. Ludlow 



Eocks^ Mount Hoburg, Sweden ; and Hudson Eiver Group, 

 Cincinnati, Ohio. 



2. „ {Uraster) pHmceva, Forbes, 1849, op. cit. pi. 1, fig. 2. Salter, 



1857. op. cit. p. 3J27, pi. ix. fig. 2. Ludlow Eocks, Underbarrow, 

 Westmoreland ; and Leintwardine, Shropshire. 



3. „ stellata, Billings, Geol. Surv., Canada, Org. Eem. Decade iii. 



pi. ix. fig 1, p. 76. Trenton Limestone, Ottawa City. 



4. .,, rugosa, Billings, ibid. pi. ix. fig. 2, p. 77. Hudson River Group, 



Anticosti. 



5. „ rigida, Billings, Trenton Limestone, Ottawa City, Canada West. 



VII. 1. Palceocoma Marstoni, Salter, 1857, op. cit. p. 328, pi. ix. fig. 3. Lower 



Ludlow, Church Hill, Leintwardine, 



