424 Transactions of the Society. 



The specimens agree with those described and figured by Wright 

 under the name Ramulina aculeata d'Orbigny sp. Such specimens 

 are abundant in most Chalk gatherings ; they are invariably frag- 

 ments, apparently of some comparatively large organism. It seems 

 probable, therefore, that Wright's specimens have no connection 

 with d'Orbigny's Dcntalina aculeata, which, according to Brady, is 

 "a common hispid Dentaline Nodosaria."* The cretaceous fossils 

 should be known as Ro/mulina aculeata Wright. 



Family VIII. GLOBIGEEINIDiE. 



Globigerina d'Orbigny. 



142. (h-a) Globigerina bulloides d'Orbigny. 



143. (h-a) Globigerina cretacea d'Orbigny. 



293. (h-a) Globigerina marginata Eeuss sp. 

 (Plate IX. figs. 1-3.) 



Rosalina marginata Eeuss, 1849, Verstein. Bohin. Kreid., pt. i p. 36, pi. xiii. 



fig. 47. 

 Ditto. (Eeuss) Jones, 1853, Ann. Mag. Nat. Hist., ser. 2, vol. xii. p. 241, 



pi. ix. fig. 7. 

 Globigerina marginata (Eeuss) Brady, 1884, Foram. 'Challenger,' p. 597, 



woodcut 17. 

 Ditto. (Eouss) Egger, 1899, Foram. Kreidemcrgeln der Oberbayerischen 



Alpen, p. 171, pi. xxi. figs. 12-14. 



This species passes by insensible degrees into its ally, the 

 commoner G. Linncana d'Orb., by the simple process of a thicken- 

 ing of the outer peripheral edge. 



144. (h-a) Globigerina Linneana d'Orbigny. 

 294. (h-a) Globigerina xquilateralis Brady. 



(Plate VIII. figs. 11, 12.) 



Globigerina zequilateralis Brady, 1879, Quart Journ. Micr. Sci., vol. xix. 



N.S., p. 71. 

 Ditto. Brady, 1884, Foram. ' Challenger,' p. 605, pi. lxxx. fig. 18-21. 

 Ditto. (Brady) Egger, 1899, Foram. Kreidemcrgeln der Oberbayerischen 



Alpen, p. 169, pi. xxi. figs. 9, 11, 21, 22, 23. 



Kecorded also by Chapman from the Chalk of Taplow. 

 * See Brady, 1884, Foram. ' Challenger,' vol. i. p. 587. 



EXPLANATION OF PLATE XI. 



Fig. 1. — Ell^soidella plcurostomclloidcs sp.n. x 100. Specimen (attached to 

 chalk matrix) laid open to show internal tube. 

 „ 2.— Ditto. Ditto. 

 ,, 3. — Pleurostomclla subnodosa. Facsimile of Reuss' figure. 



