55 
Acanthothyris Crossi, Walker. 
1870— Rhynchonella Crossi —J. F. Walker, on Secondary 
Species of Brachiopoda, Geological Magazine, Yol. vn., page 
562, figure 9. 
1878— ’Rhynchonclla Crossi, Davidson, Suppl. Jurassic Brachio- 
poda, Pal. Soc., plate xxvn., figure 17, page 223. 
This species appears to be a characteristic Brachiopod of 
the Lincolnshire Limestone. It was first found by the Lev. 
J. E. Cross, M.A., F.G.S., at Appleby, near Brigg, Lincoln¬ 
shire, and by J. F. Walker, in the Lincolnshire Limestone at 
Brough, near Hull, Yorkshire. Professor Judd gives several 
localities for this species in his “ Geology of Rutlandshire.” 
Acanthothyris hradfordensis, Walker. 
1878— Rhynchonella spinosa , var. hradfordensis , Walker.— 
Davidson’s Jurassic Brachiopoda Pal. Soc. Sup., plate xxvn., 
figure 18—19, page 2.22. 
A small species resembling the young of Rhynchonella 
concinna , but covered with spines. It occurs rarely in the 
Bradford Clay, of Tetbury Load, near Cirencester, where it 
was found by J. F. Walker ; it has also been found by Professor 
II. G. Seeley, F.P.S., in the Bradford Clay of Bradford, 
Wiltshire. 
Acanthothyris senticosa (Schlotheim). 
Deferences are given in Part II. 
1820— Terehratulites senticosm , von Schlotheim. 
1832— Terebratula spinosa , Zieten P 
1834— Terebratula senticosa , von Buch. 
1838— Terebratula senticosa , von Buch. 
1850— Ilemithiris senticosa , d’Orbigny. 
Acanthothyris senticosa , d’Orbigny. 
1856— Rhynchonella spinulosa , Oppel. 
1858— Terebratula senticosa , Quenstedt. 
1871— Terebratula senticosa , Quenstedt. 
1883— Rhynchonella senticosa , Engel. 
