A Revision of the Genus Auliscus Ehrh., &c. By J. Uattray. 869 



the centre and processes straight ; apiculi minute, scattered. Pro- 

 cesses 2, roundly oval, 0"02"-^5 mm. broad. 



Habitat : Sharks Bay^ West Coast of Austraha, in stomachs of 

 Ascidia (Macdonald*). 



A. formosus Leud.-Fort., Diat. Ceyl., p. 63, ph vii. fig. 71. 



Circular or subcircular, diam. from • 05 to ' 07 mm. Surface 

 with low processes, elsewhere almost flat. Colour pale to pale smoky 

 grey. Central space suhcircular, distinct, from 0*005 to 0*0075 mm. 

 broad. Markings, delicate uniform radial striae, most evident and 

 separated by narrow hyaline interspaces around central space, those 

 converging to the processes indistinct ; apiculi minute, irregular, dis- 

 tinct on a narrow band close to the border, absent on the outer side 

 of the processes, a few smaller and more faint sometimes near the 

 central space. Processes 2, flat on the central side, elsewhere uni- 

 formly curved, forming the arc of a circle, rarely obtusely quadrangular 

 with slightly convex sides, from • 015 to • 0225 mm. broad. 



Habitat : Ceylon (Macrae If Weissflog !) ; ' Gazelle ' expedition 

 (Weissflog !) 



A. punetatus Bail. Smiths. Contrib., 1853, p. 5, fig. 9. 



Eoundly elliptical, major axis 0'0725 to 0*125 mm., from 1/9 to 

 1/13 times minor. Surface sometimes with a faintly defined trans- 

 verse median area, almost flat to the border. Colour pale grey. 

 Central space rounded, distinct, sometimes somewhat elongated in the 

 direction of the processes, from 0*0075 to0*015 mm. broad. Mark- 

 ings, delicate striae, those converging to the processes most evident, 

 elsewhere radiating, diverging, and slightly curved, around the border 

 sometimes hardly visible ; apiculi prominent, most crowded on the 

 transverse area and around the border. Processes 2, elliptical or 

 circular, 0*02 to 0*0225 mm. broad.— Grev. Trans. Mic. Soc. Lend., 

 1863, p. 49, pi. iii. figs. 15, 16 ; Ealfs in Pritch. Inf., p. 845 ; Sch. 

 Atl., pi. Ixvii. figs. 7, 8, pi. Ixxxix. figs. 16, 17, pi. cviii. tig. 10. 



Kitton believes that this species is the same as A. j^ruinosus ; by 

 Bailey it was stated to be probably a var. of the latter. Greville, I 

 think, correctly retained both, the apiculi and other markings being 

 very distinct. 



Habitat : Cambridge deposit Barbadoes (Johnson !) ; Szakal deposit 

 (Pantocsek !) ; Kekkd deposit (Grove !) ; Santa Monica deposit (Eae ! 

 Deby !) ; Oamaru deposit (Grove ! Firth ! Eae !) ; Yokohama mud 

 (Kinker !) ; St. Bartholomew (Weissflog !) ; Pensacola (Kitton !) ; 

 * Gazelle ' expedition (Weissflog) ; Gallapagos Islands (Weissflog !) ; 

 Santos (Weissflog !) ; Los Angelos (Hardman !) ; Port Elizabeth 

 (Hardman !±) ; Eembang Bay (Debv !) ; Apia Samoa, Vera Cruz, and 

 Port Seguro (Deby !) ; Bahia (Griffin ! Kitton !) 



* Formerly in the Collection of Mr. George Norman. 



t In the Collection of Dr. R. K. Greville. 



X In the Collection of Mr, A. de Souza Guimaraens. 



