392 Mr. S. S. Buckman 07i Jurassic BracJn'opoda. 



6. Ornithella Lycetti (Davidson). 



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



T.f. Ibid. pi. Yii. fig. 17. 



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



H. Upper Ijias [Toarcian], 



Coll. [? Moore and PBatb Museum.] 



Remarhs. — I have examined the specimens in the British 

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

 figured types of Terehratida Lycetti; but I cannot admit this 

 claim except in the case of 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 the impression, from correspondence with him, that he 

 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 IMuseum 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. 17, which must be taken as 

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

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

 DallininjB, 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. Ornithella Oppeli (S. Backman). 



T.d. 189G. S. Buckman, Q. J. G. S. vol. lii. p. 702; Zeilleria Oppeli 

 T.f. Eudes-Deslongcliamps, Bracli. Jiir., Pal. Iran?, pi. xlvii. fig. 7. 

 T.l. Yerrines, pre.s Tbouars (Deux Sevres). 

 //. " Niveau de VA. opalhws " [Aalenian]. 

 rj. [Aalcnsis or ojxdinifurmis or scissi?'] 

 Coll. Sorbonne. 



8. Pseudoglossothyris banburiensis, 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." 

 H. " Upper Lias " [Toarcian]. 

 ■q. [^Falciferi?~\ 

 Coll. Mr. James GrifHn. 



Description. — A small circular Terebratuloid, its dorsal 



* In tbe Jurassic genera Ornithella, Zeilleria, Cincta, Plesiothyri.'i, the 

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

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



