?>22 Mr. S. S. Buckman on 



two : — " Whoever will carefully examine the ' Terehratulfe* 

 of tiie strata behjw the Lias will find but few which can be 

 supposed to exhibit a distinct oval or circular opening below 

 the beak (such as belongs to T. concinna, for example), and 

 perhaps none which show a truncate perforate beak (as, for 

 example, in T. maxiUata)" '^. 



Then he further says (p. 55) : " Epithyris . . . beak 

 truncate, perforate/' " Uypotliyris . . . beak acute, perfora- 

 tion below it/' Putting tliese statements with those on the 

 preceding page, it seems to be obvious that Phillips regarded 

 as typical of his genera Ilyjyothyris a.\\A Epithyris T. concinna 

 and T. maocillata respectively. 



Therefore one can say 



Genus Epithyris, Phillips, 1841. 



Type Terebratula maxiUata, Sowerby. 

 Nou Epithyris, King, uec Deslongcliamps. 



This may stand as the generic name for a small but very 

 distinct series of Jurassic Terebratulids. It includes T. suh- 

 niaxiUata, Morris, T. marmorea, Oppel, T. leniiformis, 

 Upton, T. pernio xillata, S. Buckman, and another form which 

 requires a new name. This may be called 



Epithyris hathonica, nom. nov. 



As type may be taken the specimen figured as Terebratula 

 maanllata, Davidson, Brit. Ool. Brach. (Pal. Soc.) 1851, 

 pi. ix, fig. 3 only. It is a larger and more massive shell 

 than T. niaxiUaia, Sowerby, properly represented in Davidson 

 (pi. ix. fig. 1), and it grows to a much larger size before it 

 begins to show plications. It is characteristic and fairly 

 abundant in the Great Oolite, whereas E. maxiUata charac- 

 terizes the Bradford Clay below and E. marmorea the Forest 

 ]\Iarble beds above ; so that the distinction is of strati- 

 graphical value. 



Genus Hypotiiyeis, Phillips, 1811. 

 Type Terebratula coticinna, Sowerby. 



The name Ilypothyris cannot be used, as, according to 

 Scudder, it is preoccupied — for a genus of Lepidoptera by 

 Hiibner in 1822. 



The terms epithyrid and hypothyrid will be found extremely 

 useful for describing the beak-characters which Philli[)3 



* Pal. Foss. Ooru. Devon, p. 5i (Mem. Gool. Surv. 1811). 



