84 CRETAOEOITS LAMELLIBRANCHIA. 



Non 1873. Trigonia aliformir, H. B. Geinitz. Das Elbthalgeb. in Sachsen (Palseon- 



tographica, vol. xx), pt. 2, p. 58. 

 — 18'J7. — ALiKFORMis, A. Friftich. Stud, im Gebiete der bohin. Kreide- 



foruiat. vi. Die Chlomeker Schicliten, p. 55, 



fig. 60. 



Types. — From Blackdown. I have uot been able to trace the type. Sowerby's 

 specimens are in the British Museum, except the original of fig. 3, which is in the 

 Bristol Museum. The specimens figured by Lycett are in the Museum of 

 Practical Geology (figs. 3 — -6), and in Mr. Vicary's collection (pi. xxviii, fig. 5). 

 The specimen figured by Newton is in the British Museum. 



Disfribiifiun. — Greensand of Blackdown (Zones iv to vi) and Devizes. Stated 

 by Lycett to occur at Haldon, but not recorded by Downes (1882) ; I have seen no 

 example from that locality. Zone of Hoplifes interruptus of Okeford Fitzpaine. 

 The variety attenuata is found in the Upper Greensand of Niton, Ventnor, and 

 Warminster. Agassiz' ^ record of this form from the Greensand near Cambridge 

 is erroneous. ? Folkestone Beds of Copt Point, Folkestone. 



Trigonia Meyeri, Lycett, 1875. 



1875. Lycett, p. 125, pi. xxiii, fig. 6; pi. xli, figs. 15, 16. 



1896. A. J. Jnkes-Broivne and W. Hill. Quart. Journ. Greol. Soc, vol. lii, p. 154. 



Tyjyes. — In the Museum of Practical Geology — from near Sidmouth and Duns- 

 combe. 



Distribution. — Cenomanian (Meyer's Beds 10, 11, 12) of Dunscombe, Culver 

 Hole (Devon), west of Pinhay, etc. Base of Chalk Marl (zone of Scldoenhachia 

 varians) of Titherleigh, near Chard. 



Trigonia Vectiana, Lycett, 1875. 



Additional Syrionymy. 



1818. Trigonia al^pormis, J. Soverby. Min. Conch., vol. iii, p. 27 (partim), 



pi. ccxv, fig. 2 (not 1, 3, 4). 

 1875. — Vectiana, Lijcett, p. 123, jil. xxiv, figs. 10, 11 ; pi. xxv, fig. 7. 



Types. — Museum of Practical Geology — from the Per/m-bed of Atherfield. 

 Distribution. — Perna-hed and Bed 45 (Fitton) of Atherfield. Penia -hed of 



1 'Etudes crit. Moll. Foss.,' Trigou. (1840), p. 31. 



