Manchester Memoirs, Vol. Ixii. (191 7) 47 



considerations and convenience of study, keeping in view the 

 character of the incomplete alternation of the chambers I refer 

 it to the genus Clavulina and name it C. gaudryinoides." 



My specimens found at Biarritz are numerous and differ 

 somewhat from Fornasini's, being generally shorter and stouter. 

 The oral aperture of my specimens consists of a round or 

 oval orifice situated far from the sutural line, and has the edges 

 rounded off inwards, instead of being provided with a lip as in 

 the only figure igiven by Fornasini, which latter resembles 

 closely the aperture of Gaudryina pupoides var. cliilostoma as 

 figured by Brady*, only differing in its position, being set further 

 from the suture. 



- In my opinion Fornasini would have done better to refer 

 his specimens to the genus Gaudryina, as, according to his own 

 illustrated figures, the aperture is more like that of Gaudryina, 

 and besides most of his figures show a distinct and sometimes 

 very regular biserial plan of growth following the triserial 

 portion of the test. The biserial chambers are followed by an 

 irregular series disposed somewhat in the manner of the cham- 

 bers of Pleurostomella subnodosa, Reuss. This uniserial 

 portion never assumes the regularity of that observable in 

 Clavulina communis, d'Orb. 



In the event of it being thought advisable to transfer the 

 form under discussion to the genus Gaudryina I would suggest 

 the specific appellation "trimorpha" in allusion to its trimorphic 

 growth. 



Common in the lower half of the Marl, less frequent and 

 smaller in the upper portion. 



(Fornasini's figures cover a wide range of forms, and the 

 Halkyard specimens agree generally, though they are as a 

 whole of a shorter and less elongated growth, but they present 

 a very wide range while at the same time they are evidently 

 related. We are inclined to agree with Halkyard that the speci- 

 mens would be better referred to Gaudryina than to Clavulina, 

 but Fornasini's specific name must of course be retained and 

 the specimens known as Gaudryina gaudryinoides (Fornasini.) ) 



82. Clavulina parisiensis, d'Orbigny. 



Clavulina parisiensis, d'Orbigny, 1826, Ann. Sci. Nat., vol. VII, 



p. 268, No. 3. 

 C. parisiensis, Brady, 1884, Chall. Rep., p. 395, pi. XLVIII, 



figs. 14-18. 



* Chall. Rep. 1884, pi. XLVI, Fig. 5. 



