A Bevision of the Genus Auliscus 'Ehrh., <&c. By J. Battray. 889 



sigmoid near the converging lines. A band of larger subequal areolae 

 adjacent to processes. Processes 2, elliptical, ■ 03 mm. broad, separated 

 from border by a single band of areolae. Central portion convex, 

 hyaline.— PI. XIV. fig. 5. ^ 



Habitat : King George's Sound (Grove !). 



A. mirdbilis Grev. Trans. Mic. Soc. Lond., 1863, p. 47, pi. ii. fig. 11. 



Elliptical, major axis 0'05 to 0*145 mm., from 1^ to 1} times 

 minor. Surface rising gently at the processes, transverse median 

 areas with sides distinct but outer ends inconspicuous. Colour pale 

 grey. Central space quadrangular, rarely rounded, from • 005 to 

 0' 015 mm. broad. Markings minute punctate ; strands converging 

 to the processes irregular, distinct, sometimes interrupted ; on the 

 transverse areas radial, diverging, sometimes scabrous; around the 

 border a single band of larger lanceolate areolae, -with acute peripheral, 

 and more rounded central ends. Processes 2, from 0' 01 to 0" 025 

 mm. broad, with broad irregular border, and hyaline central portion. — 

 Sch. Atl., pi. Ixxxix. figs. 10-13. 



San Diego specimens (Grundler), and some of those from Santa 

 Marta and Santa Monica have the markings more interrupted and 

 less prominent than San Pedro valves. 



Habitat : Santa Marta deposit (Doeg !) ; ]\Ionterey (Firth ! 

 Grifiin !) ; Santa Monica deposit (Kinker ! Cleve, Firth*); Santa Maria 

 deposit (Eae !*) ; San Pedro (Grove !) ; Los Angelos (Hardman ! t). 



§ 12. NOBILISSIMI. 



Transverse median areas distinct. Markings prominent between 

 the lines converging to processes, and in strands wideniug towards 

 border ; on transverse areas sometimes plumose. Processes large, high. 



A. suhcselatus sp. n. 



Elliptical, major axis 0*1125 mm., about 1\ times minor. Surface 

 rising slightly to processes, and sloping gently from ends of transverse 

 median areas to border. Colour pale smoky grey. Central space 

 irregularly hexagonal ; those sides on the transverse areas most closely 

 placed, 0"015 mm. apart, the acute angles extending close to the 

 processes. Markings punctate, forming delicate striae around the 

 processes ; beyond these, 4 or 5 unequal strands separated by narrow, 

 wavy, clear bands passing obliquely to the edges of the transverse 

 areas, similar but more uniform strands diverging from outer ends of 

 these areas to the border ; upon the transverse areas irregular, diverg- 

 ing, plumose, punctate lines. Processes 2, less convex on inner than on 

 outer side, • 0225 mm. broad. 



Habitat : Oamaru deposit (Rae !) 



* In the Collection of Dr. Griffin. 



f In the Collection of Mr. Julian Deby. 



