rOEAMINIFEEA OP THE KERIMBA AECHIPELAGO, 643 



varying greatly in proportionate length and breadth. The shorter forms are often 

 considerably inflated and not always readily distinguishable from Buliminse of the type 

 oi B. fusiformis Will, and B. affinis d'Orb. Increasing in length and with greater 

 compression of the shell we reach the type figured by Millett from the Malay 

 Archipelago (M. 1898, etc., FM. 1900, p. 280, pi. ii. fig. 13) ; the aperture in the 

 Kerimba specimens is seldom, if ever, a terminal slit as figured by him, but is lateral 

 and more or less concealed by the incurving edge of the final chamber. We figure a 

 long series of specimens illustrating the extraordinary diversity of form in the Kerimba 

 types. 



212. Virgulina schreibersiana, var. carinata, nov. (Pi. XLIX. figs. 13-17.) 



1 Station. 



At Stn. 7 an extraordinary variety occurs, characterized by extreme compression of 

 the shell, the edges of which are furnished with a stout border or carina. The earlier 

 segments in this variety are also noticeable for their regularly biserial development and 

 progression. The aperture is large and characteristic, situated on the inner face of the 

 terminal chamber. 



The robust growth of the species, the regular Bolivine ari'angement of the early 

 chambers, and the characteristic margin appear to us to be sufficient for the separation 

 of this form from the other varieties of V. schreiiersiana occurring in the dredgings. 



BiFAKiNA Parker & Jones. 



213. Bifarina porrecta (Brady). 



BoUvina porreda Brady, 1879, etc., RRC. 1881, p. 57. 



Brady, 1884, FC. p. 418, pi. lii. fig. 22. 



Egger, 1893, FG. p. 300, pi. viii. figs. 7-9, 46, 47. 

 Bifarina porrecta Millett, 1898, etc., FM. 1900, p. 540, pi. iv. fig. 3. 

 BoUvina [Bifarina) porrecta Cushman, 1910, etc., FMP. 1911, p. 48, fig. 79. 



2 Stations. 



At Stn. 1 the specimens are of fairly frequent occurrence and present great variety 

 of form, ranging from small and regularly bolivine individuals to an advanced type 

 (represented by one specimen) which is very near the B. elongata of Millett, the 

 punctse being inserted in regular parallel rows. At Stn. 9 one specimen was observed 

 the surface of which was minutely hispid. 



214. Bifarina mackinnonii Millett. (PL XLVIII. figs. 36, 37.) 



Bifarina mackinnonii Millett, 1898, etc., FM. 1900, p. 281, pi. ii. fig. 15. 

 2 Stations. 



At Stn. 1 a single specimen, which we believe represents the initial portion of this 

 test, and a small typical example at Stn. XI. This form, originally described by 

 Millett from the Malay Seas as " very rare," has a wide distribution in shallow 



