A Bevision of the Genus Auliscus Ehrh., &c. By J. Battray. 881 



processes most prominent, the others straight, radiating, and divergent, 

 close to the border more dehcate, non-pruinose, 8 to 10 in " 01 mm. ; 

 apiculi inconspicuous, irregular. Processes 2, circular, about midway 

 between the extremities of major and minor axes, 0'015 mm. broad, 

 their circumference with minute irregularities. — Sch. Atl, pi. xxxii. 

 fig. 4, pi. cviii. fig. 7. Pant. Fossil. Bacil. Ung., p. 56, pi. xix. 

 fig. 172. 



A specimen in Weissflog's collection, named A. moronensis var. 

 pruinosus, belongs to this species. 



Habitat : Moron deposit (Johnson ! Weissflog !) ; Szakal and 

 Kekko deposits (Pantocsek !) ; Szent Peter deposit (Pantocsek ! Firth ! 

 Doeg !) ; Oamaru deposit (Grove & Sturt !) ; Pensacola (Grove !). 



A HaucTcii Pant., Fossil. Bacil. Ung., p. 56, pi. xxx. fig. 304. 



Circular, diam. from • 07 to • 0925 mm. Surface rising but 

 slightly to the processes, transverse median areas indistinct, with outer 

 ends rounded close to border. Colour dark bluish grey, sometimes 

 somewhat mottled. Central space circular, 0*015 mm. broad, some- 

 times roundly elliptical with long axis at right angles to direction of 

 processes. Markings minute punctate, in prominent strands, those 

 converging to the processes closely placed with narrow hyaline inter- 

 spaces, those on the transverse area irregular, radiating and diverging, 

 widest near the central space, sometimes curved, near the border 

 becoming delicate straight uniform strias. Processes 2, circular, 

 0-0175 to 0" 025 mm. broad, their circumference subregular. Sch. 

 Atl., pi. cviii. figs. 8, 9. 



Habitat : Szent Peter deposit (Pantocsek ! Hardman ! Grove ! 

 Kinker I) ; Kekko deposit (Pantocsek ! Kinker !) ; Szakal deposit 

 (Pantocsek !). 



A. confiuens Grun., Sch. Atl., pi. xxxi. fig. 16 ; pi. xxxii. figs. 6-8. 



Circular, diam. from 0*045 to 0"115 mm. Surface rising gently 

 from the centre to the processes, elsewhere almost flat, slope at border 

 slight. Colour pale grey. Central space round, from 0*005 to 

 • 01 mm. broad, sometimes eccentric. Markings distinct, the con- 

 verging striae evident all round the processes, the others straight 

 radial, or but slightly curved and divergent, numerous shorter strias 

 around the border, interspaces wide, hyaline ; apiculi minute, numerous, 

 scattered at wide irregular intervals along the striae. Border with 

 delicate striae, 8 to 10 in 0*01 mm., about 0*0025 mm. broad, inner 

 edge indistinct, in small valves obscure. Processes 2, rarely 1 or 3, 

 round, * 005 to * 015 mm. broad, sometimes unequal on the same 

 valve, or unsymmetrical and confined to one of its halves, their 

 circumference regular. 



Habitat : Campeachy Bay (Weissflog ! Hardman ! Cleve) ; Zanzibar 

 (Weissflog !) ; Kekko, Szakal, Szent Peter deposits (Pantocsek !) ; Bahia 

 (Kitton). 



