rORAMINIEEEA OF THE KEEIMBA AECHIPELAGO. 593 



12 Stations. 



Of frequent occurrence at most of the Stns. The individuals are generally rather 

 smaller than the British specimens upon which we founded the species, and pass 

 imperceptibly into Cfoliacea (Philippi) of the original narrow-tubed circular type as 

 figured by its author. 



110. Cornuspira involvens Eeuss. 



Vperculina involvens Reuss, 1849-50, FOT. p. 370, pi. i. (xlvi.) fig. 20 (not 30). 

 Cornuspira involvens lleuss, 1861, Model no. 15. 



„ "Reuss, 1863, KTF. p. 39, pi. i. fig. 2. 

 „ „ Brady, 1884, FC. p. 200, pi. xi. figs. 1-3. 



„ „ Egger, 1893, FG. p. 246, pi. iii. figs. 18, 19. 



„ „ Miilett, 1898, etc., FM. 1898, p. 612. 



Chapman, 1900, FLF. p. 178. 

 ,, ,, (Aicornuspirum, vu.-involutum Reuss ! m. ! !) Rhumbler, 1909, etc., 



FPE. 1913, p. 425, pi. v. fig. 4. 



14 Stations. 



Generally distributed, and usually of moderately frequent occurrence. All the 

 specimens are small, but two or three distinct types occur : — (i.) The normal thin type 

 of C. involvens {cf. Brady, fig. 2); (ii.) a type with fewer whorls, like Brady's fig. 3, 

 but both megalo- and microspheric ; (iii.) a type in which the tube is of practically 

 even diameter throughout, the two faces being practically parallel. The spiral depres- 

 sion between the whorls is very slight and sometimes only apparent in a portion of the 

 terminal whorl. The specimens suggest C. pachygyra Gumbel (G. 1869, FStC. p. 178, 

 pi. V. figs. 9, 10), but the spiral line, on the obscurity of which Gumbel lays stress, is 

 more clearly indicated in his figure than in the Kerimba specimens. These individuals 

 may be compared as regards the sectional shape of their chambers, the parallel 

 disposition of the two faces of the test, and the obscurity of the superficial features 

 with Spirillina tuherculata Brady (B. 1884, FC. p. 631, pi. Ixxxv. figs. 12-16), but in 

 tliat species the surface is still further obscured by a secondary deposit of tubercles. 

 The Kerimba specimens may owe their appearance to a secondary deposit of shell- 

 matter, but, if so, it is uniformly distributed over the surface of the test, which is thick 

 and of typically milioline texture. 



111. Cornuspira charoides, sp. n. (Pi. XLVI. fig. 15.) 



1 station. 



Test consisting of an unseptate tube coiled at first in a ti'ochoid spiral consisting 

 of six or seven convolutions, followed by two convolutions in a diflferent plane and 

 enveloping the initial portion of the test in the same manner as in Ammodiscus 

 charoides Jones & Parker. The tube is crescentic in section and of normal milioline 

 texture, translucent as regards the early portion of the test, 



A single specimen from Stn. 7. 



4p 2 



