ON THE GENUS EA.MI7LINA. 335 



of branches and at intervals along their length. The swollen 

 portions resembled the somewhat loosely-set or distant segments 

 of d'Orbigny's Dentalina aculeata ; and this latter was regarded 

 as belonging to the new genus. Though there is room for doubt 

 as to the generic standing of d'Orbigny's species above men- 

 tioned, yet some aculeate DejitalirKs so nearly approach it in 

 form that it may be allowed to remain as such *. 



At all events, since 1875 numerous portions of so-called 

 Mamulince have been figured and described: and others have 

 been discovered, but not yet published ; and both as to the 

 characters of separate segments, and of tubes and parts of tubes, 

 simple or branching, they cannot be regarded as parts of auy 

 fistulose Poly morphines yet known t. 



Though the latter have more or less ramified outgrowths, these 

 do not radiate from separate subglobular chambers as in Bamulina ; 

 and the tubules of the latter are very fragile. We may note 

 that d'Orbigny alludes to the fragility of his Dentalina aculeata, 

 which we formerly assigned to Ramulina. 



It is noticeable that Bamulince " are numerous in the St. Erth 

 clay, although the tubulose Polymorphince are but sparingly 

 represented " (P. W. Millett, Trans. Roy. Soc. Cornwall, vol. xi. 



* Messrs. Balkwill and Millett, in their paper on " The Foraminifera of 

 Galway," 1884, p. 15, state that a " Eamuline " specimen from Ohalk-marl of 

 Charing, Kent, labelled " Dentalina aculeata (d'Orb.)," was obtained from a 

 London dealer " more than twenty years ago " — about 1860 ? They also 

 observe, " it is perhaps worthy of notice that many of the Ramulincs, in form 

 and texture, resemble the cervicorn outgrowths of certain Polymorphincs.'" 



t In the case of the Polymorphina proteus of Beissel, the initial series 

 resembles Polymorpfdna externally, but its internal arrangement is on the plan 

 exhibited by some of the bulbous portions of the ordinary forms of Ramulina. 

 The figs. 9 & 10 in pi. xii. represent the two sides of one specimen, which has 

 numerous short tubules set irregularly about the surface. There are faint 

 indications of rugosity. Fig. 11 is the outside, and fig. 12 the inside of a 

 specimen having projections mostly on one side, and these have a cavernous 

 junction with the body. The latter is sUghtly, and the projections are distinctly, 

 rugose or aculeate. Fig. 13 is a ramuline triiid tube, swollen at the junction 

 of the three parts ; aculeate with strong, short, scattered prickles. Fig. 14 

 shows the section of an irregularly surfaced specimen, with hollow bases in the 

 projections. Fig. 15 is the section of a smooth subspherical specimen with 

 irregular septa. Fig. 16 is subspherical and smooth, with a low rough growth 

 at the apex. The ramuline tube, fig. 13, is grouped by the author as being of 

 the same species as the others ; and is of similar formation to the projections 

 in fig. 12, in which the cavernous junction of the outgrowth with the rest of 

 the test is characteristic— " For am. Aachener Kreide,'' 1891. 



