lvi 



INFERIOR OOLITE AMMONITES. 



3. Hyattia Wilsoni, 8. Buchnan. Suppl., Plate XII, figs. 4 — 9. 



Description. — Platyleptogyral, gradumbilicate ; costate declining to striate ; 

 periphery fastigate, parvicarinate. 



Distinction. — From pustulifera, decline of ornament. 



It may be compared with Am. Murchisonx, Zieten, 1 which was made a species 

 by Mayer under the name opalinoides. But in the present species the suture- 

 lines are more ornate and more lobate, the specimens are more coarsely costate, 

 rather thicker, and less acuti-fastigate. 



Remarks. — Greatly do I regret to say that since the name was given to this 

 species, and the description written, the friend to whom it was dedicated as a 

 reminiscence of our joint work at Dundry is deceased. I allude to the late 

 E. Wilson, F.Gr.S., the former curator of the Bristol Museum. I am indebted to 

 him in very many ways ; and through the keen interest which he took in this work 

 I have derived the greatest assistance in the way of interesting material. 



Localities and Strata. — Dorset: Chideock Quarry Hill, in the " Wild Bed;" 

 Somerset: Dundry Hill, probably from the hard, irony bed. 



Date of Existence. — Murcliisonse hemera. 



4. Hyattia subcava, S. Buchnan. Woodcut Fig. 13 in text. 



Description. — Platyleptogyral, parvigradumbilicate, subcostate declining to 

 striate, periphery fastigate, parvicarinate. 



Sa fr 



Fie. iS.—Byattia subcava, S. Buckman. Paving Bedj Bradford Abbas, Dorset, a, side view; b, whorl-section ; 

 c, suture-lines; d, radial curve. 



1 Verstein, Wurtt., PI. vi, fig. 1 only. 



