FOEAMINIFEEA OF THE KERIMBA ARCHIPELAGO. 655 



243. Lagena ampuUa-distoma Rymer Jones. 



Lagena vulgaris, var. ampulla-distoma Ry. Jones, 1872, LJS. p. 63, pi. xix. fig. 52. 

 Lagena ampulla-distoma Brady, 1884, FC. p. 458, pi. Ivii. fig. 5. 



„ Millett, 1898, etc., FM. 1901, p. 5, pi. i. fig. 5. 

 „ „ Sidebottom, 1904, etc., RFD. 1906, p. 2, pi. i. figs. 2, 3. 



„ „ ., Sidebottom, 1912, etc., LSP. 1912, p. 384 ; 1913, p. 168. 



5 Stations. 



A few specimens only, all of the original type of Rymer Jones as regards superficial 

 markings, i. e. with the entire shell-wall covered with " exogenous shell deposit." 

 None of the specimens presents that differentiation in markings indicated by Brady 

 and Sidebottom, in which the upper half of the shell is relatively smooth as compared 

 with the basal half. At Stns. 1 and 3 two varieties were found in company — -one 

 normal, the other in which the apiculate base was lacking. At Stn. 6 all the 

 specimens lacked the distomous base. Such specimens with only a terminal aperture 

 would be easily confused with L. aspera, but for the fact that the aperture is of the 

 flush or depressed nature characteristic of the normal L. ampulla-distoma, instead 

 of being produced as in L. aspera. They seem, however, to confirm the relationship of 

 the type with L. aspera rather than with L. glohosa, to which it is usually affiliated. 



244. Lagena aspera Eeuss. 



Lagena aspera Reuss, 1861, FK]\I. p. 305, pi. i. fig. 5. 



„ Reuss, 1862, FFL. p. 335, pi. vi. fig. 81. 

 Entosolenia aspera Mobius, 1880, FM. p. 91, pi. viii. figs. 11, 12. 

 Lagena aspera Brady, 1884, FC. p. 457, pi. Ivii. figs. 7-10. 



„ Egger, 1893, FG. p. 3,25, pi. X. fig. 11. 



„ Millett, 1898, etc., FM. 1901, p. 6. 

 „ „ Sidebottom, 1912, etc., LSP. 1913, p. 167, pi. XV. figs. 11-13. 



3 Stations. 



Only a few specimens, varying considerably in their markings. Fairly typical at 

 Stn. 4 ; small, but otherwise typical at Stn. % X. At Stn. 3 the surface of the shell, 

 instead of being spinous, was, under a higher power, seen to be covered with zigzag 

 processes, giving a characteristic appearance to the shell. 



245. Lagena rudis Reuss. 



Lagena rudis Reuss, 1862, FFL. p. 336, pi. vi. fig. 82. 



„ Reuss, 1863, FCA. p. 145, pi. i. fig. 17. 

 Entosolenia rudis Mobius, 1880, FM. p. 90, pi. viii. fig. 10. 

 Lagena rudis Millett, 1898, etc., FM. 1901, p. 6, pi. i. fig. 6. 



1 Station. 



A single specimen of this extremely rare species. Nearly globular, the surface 

 being covered with rounded warty protuberances, irregularly disposed, and not 

 presenting any signs of the " reticulate system " observed in the intermediate spaces 

 by Millett in his Malay specimens. 



VOL. XX. — PART XVII. No. 15. — November, 1915. 4 z 



