392 Mr. S. S. Buckman on Jurassic Brachiopoda. 



6. Ornithella Lycetti (Davidson). 



T.d. Ool. & Lias Brach. (Pal. Soc.) vol. i. p. 44 ; Terehratula Lycettt. 

 T.f. Ibid. pi. vii. fig. 17. 



T.l. BaiTinfrton, near Ilminster [Somerset]. 



H. Upper Lias [Toarcian]. 

 Coll. [? Moore and PBath Museum.] 



Bemarhf^. — I have examined tlie specimens in the British 

 Museum {Davidson Coll.), no. B. 6906, claimed to be the 

 figured types of Terehratida Lycetti; but I cannot admit this 

 claim except in the case o£ perhaps fig. 21. Davidson gives 

 the size of his example for fig. 17, which shows that this is 

 figured the natural size ; none of B. 6906 are of these 

 dimensions. A label in Davidson's handwriting accompanies 

 the specimens, saying *' These are the types '^ ; but I am 

 under tlie impression, from correspondence with him, tliat lie 

 was wont to use the word "■ type " where we should now say 

 " topotype/' and there are instances in his collection which 

 fully support this view. 



The British Museum specimens are all Terebratuloids ; they 

 have a circular foramen touching the umbo (rudimentary 

 deltidial plates in one case), no beak-ridges, and no sign of 

 septum. Davidson in regard to fig. 1 7, which must be taken as 

 the liolotype, so clearly shows Dalliniform beak-characters *, 

 that we must accept them, and range T. Lycetti in the 

 Dallininje, especially as we know that there are such forms 

 with Dalliniform beak - characters in the Upper Lias. 

 Davidson's figs. 20, 21 are obviously Terebratuloids. 



7. Ornitliella Oppeli (S. Buckman). 



T.d. 189G. S. Buckman, Q. J. G. S. vol. Hi. p. 702 ; Zeilleria Oppcli. 



T.f. Eudes-Deslongcbamps, Brach. Jur., Pal. franf. pi. xlvii. fig. 7. 



T.l. Yerrines, pres Thouars (iJeux Sevres). 



II. "Niveau de VA. opaliniis'^ [Aalenian]. 



t). [Aalensis or ojialiniformis or scissi?^ 



Coll. Sorboune. 



8. Pseudoglossotliyris hanhuricnsis^ nom. no v. 

 T.d. Below. 

 T.f. Davidson, Trias. & Jur. Brach. (Pal. Soc), Suppl. pi. xxiv. fig. 30. 



( Waldheimia Lycetti.) 

 T.l. " Bloxham, near Banbury.'' 

 //. " Upper Lias " [Toarcian]. 

 r). [Falciferi?'] 

 Coll. Mr. James GrifBn. 



Description. — A small circular Terebratuloid, its dorsal 



* In the Jurassic genera Ornithella, Zeilleria, Cincta, Plesiothyris, the 

 peculiar beak-characters being found associated with a long loop and a 

 septum, the former may be taken as the outward index of the latter. 



