Dr. J. W. Gregory — On Falceozoic Starfishes. 34:7 



The abactinal furrows are large and subpetaloid. Tliey are 

 bounded by large, tuberculate adambulacral plates. The 

 ambulacral plates are boot-shaped. The pores for the podia 

 are large, and occur on the suture between the adambulacrals 

 and anibulacrals. 



The adambulacral elements in the oral armature are prominent, 

 and consist of five pairs of subtriangular plates. 



Type Species. — Aiterias antiqua, Hisinger, 1837. Silurian: 

 Gotland. 



LiNDSTiiOMASTER ANTIQUA (Hisinger), 1837. PI. XVI, Fig. 1. 

 Synonymy. 



Asterias antiqua, Hisino-er, 1837 : Leth. Svec, p. 89, pi. xxvi, fig. 6. 

 ,, ,, Hisiug-er, 1840: Auteckningar, pt. vii, p. 64. 



,, ,, Bronn, 1848: lud. Pal., jN'omeucL, p. 120. 



Falmipes ,, Forbes, 1848, "Aster, foss. Brit.": Mem. Geol. Surv., vol. ii, 

 pt. 2, p. 481. 

 ,, ,, Liiidstrom, 1867: Nom. foss. Sil. Gotl., p. 26. 



Faheasterina antiqua, Salter, 1857, " New Pal. Starfishes " : Anu. Mag. Nat. Hist., 

 ser. 2, vol. xx (1857), p. 327. 

 ,, ,, Woodward, 1869: Euvladia, Geol. Mag., Dec. I, Vol. VI, 



p. 244. 

 ,, ,, Liudstrom, 1885 : List foss. Gotland, p. 14. 



,, ,, Liudstroin, 1888 : List. foss. Faunas Swed., pt. ii, p. 16. 



,, ,, Lindstrom, 1888 : Schichtenf. Sil. Gotl., N. Jahrb., 1888, 



vol. i, p. 157. 

 ,, ,, Stiirtz, 1893, "Verst. uud leb. Seesterne " : Verb. Nat. Ver. 



preiiss. Rheinl., p. 44. 

 AsteriscHS antiquus, Pictet, 1857 : Traite Pal., vol. iv, p. 267, pi. xcviii, fig. 4. 



Diagnosis. 



Disc small, with the ratio of B : i- as 18 : 11. 

 The interradial areas (and the whole ' squelette ventro-lateral ' of 

 Perrier) are wide, and include 9 or 10 plates in width across 

 the radius to the interradial angle. 

 The adambulacral plates number about 20 in each series. 

 Dimensions. 



Hisinger' s 



Measm-ements 



figure. 



from the specimen, 



18 mm. 



18 mm. 



13 „ 



11 n 



3 „ 



3 „ 



E 



r ... ... 



Maximum width of ambulacral fm-row 



Distribution. 



Bed 6', corresponding to the Wenlock Shale, Gotland. 

 Figures. 



PI. XVI, Fig. 1. Actinal surface of the type-specimen, Angelin 

 Coll., Mineralogical Museum, Copenhagen. Fig. la, the outline of 

 the specimen, nat. size ; Fig. \h, the same, x 4 dia. 

 2. UEANASTER, nov. gen. 

 [From Uranus, the grandfather of Pluto ; the starfish resembles the living genus 



Flutonmter .'\ 

 Diagnosis. 



Lindstromasterinee with, a large disc and five long, gradually 

 tapering arms. 



