274 FORAMINIFERAL ROCKS ON WEST COAST OF SANTO. 



and species of even such lowly forms as protozoa have been more 

 or less restricted in their geographical distribution from their 

 earliest geological appearance until recent times; for this part of 

 the world afforded us the earliest dredged specimens of Cyclo- 

 clypeus, and with the exception of an Arabian fossil species, the 

 Tertiary examples seem to be restricted to this area also. 



Note. — Since writing the above (Aug., 1904), I have received 

 from Messrs. P. Lemoine & R. Douville an interesting and 

 important monograph on the genus Lepidocyclina (Mem. Soc. 

 Geol. France, Vol.xii. fasc.ii. Mem.32, 1904). 



EXPLANATION OF PLATES V.-VIIL 



Plate V. 



Fig. I. — Foraminiferal limestone, with Cycloclyi^eiis, Lithothamnion and 

 echinoid spines ( x 16). 



No. 223. The Bubo, Santo. 

 Fig. 2. — Foraminiferal limestone, with Lepidocyclina martini, Schlumberger, 

 and Poly trema planum, Carter ( x 16). 



No. 176. Wai Malikoliko, Santo. 



Plate vi. 



Fig. 1. — Lepidocyclina insnlce-natalis, Jones & Chapm. Section across the 

 median plane ( x 16). 



No. 211a. Wai Bubo, Santo. 

 Fig. 2. — GyclocUjpeus piistulosus, sp.nov. Section through the median plane 

 of a microspheric form ( x 16). 



No. 182. Wai Malikoliko, Santo. 



Plate vii. 



Fig. l.—Bairdia sp. cf. foveolata, G. S. Brady. A left valve ( x 32). From 



the decomposed, friable rock just below the limestone at Wai 



Malikoliko (No. 182). 

 Fig. 2,—Cycloclypem pustulosus, sp.nov. ( x 32). Wai Malikoliko (No.l82). 

 Fig. 3. — Lepidocyclina martini, Schlumberger, var. rotula, nov. { x 16). Wai 



Malikoliko (No. 182). 

 Fig. 4, — L. martini, var. rotula, nov. Section through the test, partly 



median, partly tangential ( x 32). Wai Malikoliko (No. 182). 



Plate viii. 

 Generalised Geological Section across South Santo. By D. Mawson. 



