FOEAMINIFERA OF THE KEEIMBA ARCHIPELAGO. 721 



lightly depressed umbilical recess often filled with granular matter. Surface of 

 the test rough, coarsely perforate. Aperture obscure, a slit on the inner margin 

 of the terminal chamber. 



This rather striking little form is one of the constant features of the Kerimba 

 dredgings, occurring at a great many Stns. and often in abundance. At most of tire 

 Stns. specimens are not consistently spinous, but present only a few spines, at irregular 

 intervals, on the cuspid margins of the chambers. At Stn. '?X, however, where it 

 reaches its optimum development, all the specimens are extremely aculeate and in 

 many cases the cusp of each chamber is furnished with a pair of spines. In other 

 instance's, in addition to these stout marginal spines, the superior surface is hispid all 

 over. A few are spinous as regards tjje early chambers only, those of the last whorl 

 being cuspless and smooth. Millett's variety Discorhina, iinperatoria, var. glohosa, 

 which he describes as one of the characteristic forms of the Malay Archipelago, 

 of which we possess the type-specimens, is identical with the Kerimba form. It 

 appears to have but little resemblance to d'Orbigny's type Rosalina imperatoria (d'O., 

 1846, FFV. p. 176, pi. x. figs. 16-18), being distinctly rotaline in the arrangement of 

 its chambers, but there is a marked divergence in the extent of the development 

 of the spines, which even in the most advanced Kerimba specimens rarely attain the 

 proportions of Millett's figure. 



Our species may be regarded as an isomorph of Bosalina imperatoria d'Orbigny, 

 to which Millett assigned his form. This, however, is a markedly discorbine 

 type with a depressed umbilical recess and striate markings on the inferior side. It 

 does not appear to have been met with in the recent condition except by Side- 

 bottom, whose figures of D. imperatoria represent a discorbine type of shell quite 

 distinct from both the Malay and Kerimba individuals (S. 1901, etc., E.FD. 1908, 

 p. 13, pi. V. figs. 1, 2). 



In the Biady Collection at Cambridge there is a slide of specimens from Fiji 

 (Levuka, Shore-sand) labelled Hotalia dentata P. *& J. All the specimens are 

 referable to our species H. erinacea. It is not easy to understand how Brady arrived 

 at his determination, as both the figure and description of i?. dentata (P. & J., 1865, - 

 NAAF. p. 387, pi. xix. fig. 13 a-c) differ in every essential feature from this type. 



Millett's varietal name glohosa cannot be adopted as the specific name for the type, , 

 as it has already been used for a distinct form [Nonionina globosa v. Hagenow, Neues' 

 Jahrb. f. Min. 1842, p. 574), which is Botalia glohosa Reuss (SAWW. 1861, vol. xliv. • 

 p. 330, pi. iii. figs. 4-6). 



Breadth 0T5 to 0-22 mm., height about 0-15 mm. 



426. Eotalia mnrrayi, sp. n. (Pi. LIII. figs. 27-34.) 



6 Stations. 



Test free, subglobular, consisting of three to four convolutions each of about six 

 inflated chambers. Sutural lines depressed. The whole surface of the shell covered 



5 H 2 



