A Revision of the Genus Auliscus Ehrh., &c. By J. Rattray. 875 



Processes 2, round, witli a small protuberance on the side towards the 

 border, • 01 mm. broad, placed midway between the outer edge of the 

 transverse areas and the border. 



This is not A. fenestratus Grove & Sturt, as indicated in Sch. 

 Atl., pi. cxxv. fig. 11. 



Habitat : Oamaru deposit (Grove & Sturt !). 



A. dissimilis sp. n. 



Eoundly elliptical, major axis 0"1075 mm., about lyL- times 

 minor. Surface subplain ; transverse areas with outer extremities 

 rounded, reaching close to the border, and bounded by an evident 

 clear band. Colour pale grey. Central space circular, 0'02 mm. 

 broad. Markings delicate, subpruinose, closely-placed striae, most 

 evident on the transverse areas, hardly converging around the pro- 

 cesses. Processes 6, two large, equal, and mammillate towards the 

 ends of the major axis, two smaller subequal at the extremities of the 

 transverse area, and two others subequal to the latter, placed towards 

 the opposite sides of the mammillate pair, and at considerable unequal 

 distances from them. — PI. XIY. fig. 6. 



Habitat : Yokohama (Cleve !). 



A. insignis Cleve, Kongl. Sv. Yet. Ak. Handl. Stockh,, 1881, No. 5, 

 p. 22, pi. V. figs. 64a, 645. 



Subcircular, diam. • 0625 to 0*12 mm. Surface with a distinct 

 obcordate area between the centre and each process, the transverse 

 median areas narrow, expanding towards the outer concave or sub- 

 straight ends, their outer edges clear, well-marked. Colour pale grey, 

 darker along edges of transverse and obcordate areas. Central space 

 • 0075 to • 015 mm. broad. Markings obscure, punctate, sometimes 

 between the areas darker irregular spots. Processes 2, tapering 

 gradually to rounded apex, 0"015 mm. broad. — Sch. Atl., pi. Ixxxix 

 fig. 1. 



Habitat : Galapagos Islands (Cleve, Weissflog !). 



A. gracillimus sp. n. 



Subcircular, diam. 0-2 mm. Surface flat at centre, the obconical 

 elevated area around processes short, extending only to outer ends of 

 angles of central space, the transverse median areas indistinct, with 

 outer angles obtuse and ends rounded. Colour pale grey. Central 

 space with sides slightly concave outwards, and angles slightly pro- 

 tuberant, about • 03 mm. broad. ]\rarkings obscure ; apiculi absent ; 

 a reticulum with delicate meshes evident, absent from central space. 

 Processes 2, mammillate, free ends rounded, near their base a series of 

 subparallel striae evident. — PL XIII. fig. 6. 



Habitat : Santa Monica deposit (Eae ! Firth !). 



