A Revisioji of the Genus Auliscus Ehrh., &c. By J. Battray. 885 



A. spectabilis sp. n. 



Elliptical, major axis -1125 mm., about 1 jL times minor. Surface 

 rising slightly for about 1/2 radius from centre, highest zone circular, 

 at inner side of processes indistinctly deiined, about 0*0125 mm. 

 broad, beyond this sloping gently to the border. Colour pale grey. 

 Central space minute, about • 0025 mm, broad, indistinct. Markings 

 punctate, in straight radiating lines, those converging to the processes 

 more evident, a faint irregular reticulum upon the highest zone, and 

 less evident on outer portion of depressed central area, outside of this 

 zone narrow, distinct, almost straight lines passing to the border. 

 Processes 2, circular, • 0125 mm. broad, their border finely striated. 

 —PI. XIII. fig. 2. 



This species is related to A. cselatus through A. cselatus yqi. incta. 



Habitat : Yokohama (Hardman !). 



A. splendidus sp. n. A. gigas Grun. (not Ehrb.), Sch. Atl., 

 pi. cxvii. figs. 5-7. 



Elliptical, major axis, • 15 to ■ 305 mm., 1 1- to 1 jL times minor. 

 Surface rising but shghtly near the processes, elsewhere flat, trans- 

 verse median area sharply defined. Colour pale grey. Central space 

 roundly elliptical, • 025 to • 03 mm. broad. Markings conspicuous, 

 distant, narrow costas, those converging to the processes often ana- 

 stomosing near the latter, on the transverse area dehcate strise, straight 

 or shghtly curved, and diverging from the central space ; at its centre 

 a few diverging, sometimes anastomosing radial costae. Processes 2, 

 rounded, from 0-035 to 0-01 mm. broad, outer edge irregular, with 

 border broad and central portion distinctly punctate. — A. sculjiius var. 

 permagna Witt, Sch. Atl., pi. cxvii. figs. 5-7. 



Habitat : Loc. ? (Griffin !) ; Iquique (Kitton !). 



A. cselatus Bail. Smiths. Contrib., 1853, p. 6, pi. figs. 3, 4. 



Eoundly elliptical, major axis from • 04 to " 12 mm., 11 to 

 1-1 times minor._ Surface rising gently to processes, transverse 

 median areas distinct, with outer ends broad, rounded, sharply defined. 

 Colour pale grey. Central space rounded or obtusely angular, rarely 

 rectangular, sometimes indistinct, 0-0075 to 0*0125 mm. broad. 

 Markings costate, those converging to the processes, sometimes less 

 prominent than those proceeding from their outer side to the border, 

 the latter straight in hue of processes, elsewhere concave towards 

 that line; on the transverse area least evident, sometimes punctate, 

 straight or flexuous, and diverging ; near the outer ends of this area 

 anastomosing between it and the border conspicuous, convex towards 

 the processes. Processes 2, rarely 3, rounded, - 0075 to - 0175 mm. 

 broad, their circumference sometimes irregular. — Ealfs in Pritch. Inf. 

 p. 845; Grev. Trans. Mic. Soc. Lond., 1863, p. 44, pi. ii. fig. l\ 

 Sch. Atl., pi. xxxii. figs. 14, 15; Pant. Fossil. Bacil. Ung., p. 55' 

 pi. xix. fig. 173 ; H. L. Smith, Diat. Spec. Typ., No. 54. A. Smithil 



