336 MESSES. T. R. JONES AND P. CHAPMAK 



1895, p. 658). On the contrary, these Folymorpliinae are plentiful 

 in the Crag of Suffolk ; but BamulincB are absent there. 



Further, more or less perfect and characteristic specimens, 

 having a definite commencement and a great tubular extension, 

 have been met vrith. These, though markedly distinct from 

 PolymorpMnce, have nevertheless their relatively small initial 

 chambers constructed on a Polymorphine plan, just a.s Arficulina 

 has a Milioline, Frondicularia a Nodosarian or Polymorphine, 

 Flahellina a Cristellarian commencement, and so on. 



This feature, of course, indicates that Bamulina is allied to 

 FolymorpTiina (perhaps subgenerically, as Articulina is to Milio- 

 lina, &c.); and yet another feature, namely the presence of a 

 somewhat Polymorphine and valvular septation in the swollen 

 parts of the branching tubes, also shows that Ramtdina has some- 

 what of the nature of PolymorpMna, but without identifying 

 itself with the latter. This structure, found by us in the nodular 

 or inflated parts of Bamulina, shows itself in Beissel's figures 

 of '"'' PolymorpJiina proteus^^ ; and we refer Beissel's form to 

 Bamulina, although its exterior is strikingly like that of Poly- 

 morphina gihha var. diffusa *. 



In some of Beissel's figures of " Polymorphina proteus,^'' 

 notably pi. xii. figs. 9 to 16, we have a Polymorphina-like test 

 giving rise to a Bamulina, prickly on the surface, and in every 

 way comparable with those already known from various Cretaceous 

 deposits. At first sight the figures 9-11 and 16 might appear to 

 belong to an ordinary fistuiose Polymorphina ; but examined in 

 the manner shown in figs. 12, 14, & 15, which are half-sections 

 of the test, showing the interior, the subdivision into chambers 

 is seen to diflTer materially from that of a typical Polymorphina, 

 and agrees in many striking particulars with the mode of septation 

 shown in the bulbous or swollen portions of Bamulina, as ex- 

 emplified in thin sections of the bulbs of the latter genus from 

 the Chalk-marl, investigated during the writing of the present 

 memoir. 



We note that the late Dr. H. J. Carter has described a sub- 

 cylindrical "branched form of the apertural prolongation from the 

 summit of Garpenteria moniicularis," beginning with a fork of 

 two branches, of which the remaining one divides afterwards 

 into three (Ann, & Mag. Nat. Hist. ser. 4, vol. xx. 1877, p. 68, 



* See previous part of this Memoir, pp. 505 & 516. 



