L. Richardson- — PoUicipes from Inferior Oolite. 351 



lY. — On a New Species of Pollicipes from the Infekior Oolite 



OF THE COTTESWOLD HiLLS. 

 Ey L. EicHAKDSON, F.G.S. 



FOUR species of Pollicipes have been recorded from the Rhsetic and 

 Lower Jurassic Eocks of Great Britain. 

 1 . — Pollicijics rh(eticus, Moore. Pteria - contorta - Zone, Ehsetic 

 [Khfetian]. Hapsford Mills, Vallis Yale, near Frome, 

 Somerset. Quart, Journ. Geol. Soc, vol. xvii (1861), 

 p. 512, and pi. xvi, fig. 30. 

 2. — Pollicipes rhotnboidalis, Moore. " Lias [Hettangian] at Ewenny 

 and at Langan, Glamorganshire." The type-specimen came 

 from the Sutton Stone [Hettangian] of Shepton Mallet, 

 Somerset. Quart. Journ. Geol. Soc, vol. xxii (1867), p. 539, 

 and pi. xvi, fig. 31. 

 3. — Pollicipes aJatus, Tate. "Zone of A. angulatiis^^'' Lower Lias 

 [Hettangian]. Island Magee, Antrim. Trans. Belfast 

 IS'at. F.C. (1870), p. 23, and pL i, fig. 6. 

 ^L.—Pollici'jyes ooliticus, J. Buckman. Stonesfield Slate, Great Oolite 

 [Bathonian]. Eyeford, near Cheltenham. "Outline of the 

 Geology of the jS'eighbourhood of Cheltenham," by Sir R. I. 

 Murchison, 2nd ed., by H. E. Strickland and James Buckman 

 (1844, Cheltenham; 1845, London), p. 95, and pi. iii, fig. 7. 

 A fifth species has now to be added : 



5. — Pollicipes aalensis, L. Richardson, sp. nov. Lower Limestone, 



Inferior Oolite (Aalenian). Well House, Haresfield Hill, 



near Gloucester. 



The specimen was found by Miss H. M. Hutton, of Harescombe, in 



a small section near the Well House on the northern slope of 



Haresfield Hill, whence she has also procured a large number of 



specimens of a pentacrinite. 



Examples of the plates of the capitula of Pollicipes are none too 

 common in the Rhsetic, Lower Lias, or Inferior Oolite rocks of Great 

 Britain. Charles Moore has recorded that thej' are not infrequent in 

 a clay-bed of Rhsetic age, which rests iinconformably upon the 

 Carboniferous Limestone at the Hapsford-Mills section in Yallis Yale, 

 near Frome, but that is the onty locality I know of in these Isles 

 where they have been found in the Rhaetic. 



Charles Moore has also obtained specimens of a species, which he 

 called Pollicipes rhomhoidalis, from the Lias of Glamorganshire and 

 from the equivalent beds near Shepton Mallet. 



Ralph Tate obtained another species from beds of about the same 

 date (Hettangian) at the Island Magee, and named it PoUicipes alatus. 

 I have found several examples of plates belonging to a species 

 inseparable from this one in the Lias of oxynoti-armati hemerae that 

 was exposed when excavations were being made for a new gas-holder 

 at the Gloucester Gas Works. 



To represent the Inferior Oolite form there is only the portion of 

 the tergum described below ; but it is very distinctive, and leaves no 

 room for doubt about its zoologic relations. 



In the Stonesfield State of Eyeford, near Cheltenham, and Stonesfield, 



