OlS" THE GENUS RAMULTNA. 337 



woodcut). He also described and figured the dendriform growth 

 of another specimen {op. cit. vol. xix. 1877, p. 212, pi. xiii. fig. 9 h). 

 The possible existence of delicate fistulose growths in other 

 Carpentericd and in Polytrema was alluded to by this careful 

 observer in the first-mentioned paper *. 



These may possibly come into the category of simple fistulose 

 growths, like those of Polytnorpliina and Cristellaria already 

 described; but the branching-tube of the Carpenteria differs, 

 by its freedom, length, and special pattern, from those of Poly- 

 morpJiina. If this be so, we may extend our foregoing proposi- 

 tion that Mamulina has a definite initial structure analogous to, 

 or comparable with, a certain Foraminiferal type, and suggest 

 that, besides PolymorpTiina, some forms of Carpenteria and other 

 genera may supply the structural commencement of distinct 

 kinds of such ramifying growths. 



Leaving the Dentalina acideata of d'Orbigny as a Nodosarian 

 (so regarded by Brady, Millett, and others), we have to treat of 

 true aculeate MamulincB. It has already been remarked by one 

 of us t, that it appears desirable to associate the tubular and 

 sometimes globular-chambered BamulirKB, whether smooth or 

 prickly, from Cretaceous strata, with certain recent Foraminifera 

 found in moderately deep water, and figured by H. B. Brady. 

 A careful consideration of the Cretaceous forms of JRamulma has 

 since led us to believe that there are four types present in that 

 formation. One of these is a thin-shelled setose form, repre- 

 sented by B. glohulifera ; the second, a coarser form as regards 

 the test-structure, having stronger prickles, we propose to call 

 B. aculeata (after J. Wright) ; the third type, having smooth- 

 surfaced stolon-tubes and bulbs, is referred to as B. Icevis ; the 

 fourth is B. cervicornis of the Grault ; and a good recent form 

 is the fifth, namely B. Grimaldii, Schlumberger. 



§2. Generic Characters of Ramulina. 



Test free or attached ; branching ; consisting of a calcareous 

 tube, swollen at intervals, so as to form more or less defiuite, 

 often irregular segments, from which lateral stolons or branches 



* Dr. A. Goes, in 1882, suggested that the RamuUnm may be only parts of 

 aulostomatous Nodosarince, Polymorphince, Planorbulincs, GlobigerincB, aad 

 CarpentericB. — K. Svensk. Vet.-Ak. Handl. vol. xix. no. 4, p. 15. 



t Quart. Journ. Geol. Soc. vol. 1. 1894, p. 717. 



