872 Transactions of the Society/. 



Colour pale grey, darker at sides of elevated area. Central space 

 round, indistinct, • 005 mm. broad. IMarkint^js striate, faint, at the 

 edp;es of the elevated area geniculate, ])eyond this area straight along 

 a line at right angles to the direction of the processes, elsewhere 

 slightly concave towards the processes. A hyaline irregular curved 

 narrow band passing outwards from the centre s|>ace along the edges 

 of the sets of converging striae. Processes elliptical, outer side some- 

 times protuberant, 0-0125 mm. broad at base. — I'l. XII. fig. 1. 

 Habitat : Galapagos Islands (Weissflog !). 



A. elegans Grev., Trans. Mic. Soc. Lond., 1863, p. 45, pi. ii. fig. 8. 



Subcircular or nmndly elliptical, diam. 0" 0625 to 0"1125 mm. 

 Surl'ace rising from the central space around the processes, transverse 

 median area short, extending to about 1 /4 of radius from centre, with 

 outer ends irregular, beyond this sloping gently to border. Colour, 

 pale grey. Central space rounded, 0'0075 to 0*0125 mm. broad, 

 indistinct. Markings striate, the striae converging to the processes 

 distinct, those on the transverse median areas short, straight, or slightly 

 concave towards the processes, the narrow adjacent area hyaline, or 

 with a faint irregular reticulum, beyond this the striae delicate, 

 straight, at right angles to line of processes, elsewhere concave away 

 from this, but again slightly convex near the processes ; separate, 

 minutely punctate, narrow, irregular strands between the striae, some- 

 times apiculate. Processes 2, rounded, 0'015 to 0'0225 mm. broad, 

 with the circumference irregular and border sometimes minutely 

 punctate. — A. Grunovii Sch. Atl., pi. Ixxxix. fig. 7. 



Habitat: Patos Island guano (Johnson !) ; Santa Monica deposit 

 (Eae ! Hardman !*) ; Chal ky Mount, Barbadoes (Griffin !) ; Los 

 Angelos (Hardman !). 



Yar. californica. 

 A. Grunovii var. californica Grun., Sch. Atl., pi. Ixxxix. fig. 8. 



Eoundly elhptical, major axis • 125 mm., about 1^ times minor. 

 Markings more pruinose, continuous at outer end of transverse median 

 areas, those converging to the processes more extended, sharply curved 

 towards their inner ends, elsewhere almost straight, around border the 

 punctate striae narrower than the hyaline interspaces. Processes 2, 

 sometimes relatively smaller, elliptical, 0'015 mm. broad. 



Habitat : Santa Monica deposit (Kae I). 



Var. Grmiovii. 



A. Grunovii Sch. Atl., pi. xxx. fig. 14. 



Subcircular, diam. • 22 mm. ]\Iarkings punctate, scabrous, the 

 clear striae-like interspaces converging around the processes uniformly 

 curved, at outer ends of transverse area an irregular hyaline space 

 with irregular puncta, near border an irregular crescentic clear 



* In the Collection of Mr. A. de Souza Guimaraene. 



