A Revision of the Genus Auliseus Ehrb., &c. By J. Battray. 911 



E. inconsjpiciius sp. n. 



Diam. 0'055 mm. Surface flat. Colour pale grey. Markings 

 hexagonal areolae, 4 in 0"01 mm., subequal or somewhat smaller 

 around the border, without order. Border narrow, hyaline. Processes 

 4, symmetrical, minute-, subcircular, about • 0025 mm. broad, placed 

 upon the outermost band of areolae. 



This species has sometimes been united to E. radiatus to which 

 it shows no close affinity. 



Habitat : Cove, Calvert County, Maryland (Gre^ille !). 



E. minutus Grev., Trans. Mic. Soc. Lond., 1866, p. 5, pi. i. fig. 13. 



Diam. 0'05 mm. Surface slightly convex. Markings obscure, 

 areolate, 5 in " 01 mm., fiubequal to border, without order. Border 

 narrow, hyaline. Processes 4, about 1/4 of radius from circumference, 

 circular,* U"005 mm. broad, provided with a prominent lip on their 

 peripheral side. 



Greville expresses doubt as to the position of this species, and 

 notes that the processes are somewhat similar to those of Grasjpedo- 

 porus. The structure is, however, quite eupodiscoid. 



Habitat : Springfield deposit, Barbadoes (Hardman f). 



E. californicus Grun., Yan Heurck, Syn. Diat. Belg., pi cxviii. fig. 8. 



. Diam. 0*0475 to 0'075 mm. Surface almost flat. Colour pale 

 grey. Markings, delicate polygonal areolae without a distinct rounded 

 central granule, irregular but largest about the centre, and decreasing 

 gradually towards the border, 6 to 8 in • 01 mm., arranged to form 

 an evident band round each process, elsewhere in straight, radial, 

 non-fasciculate rows ; apiculi 3, distinct, equidistant from the 

 processes, but closer to the border, sometimes a few other smaller 

 apiculi also near the border. Border distinct, about 1/10 to 1/14 of 

 radius broad, striae at its inner edge delicate, 8 in O'Ol mm., those on 

 the outer edge shorter, about 6 in • 01 mm., intermediate portion 

 hyaline. Processes 3, circular, about 0'003 mm. broad, insertion 

 from 3/4 to 4/5 of radius from border. 



Habitat : Gulf of Cahfornia (Hardman ! Van Heurck) ; 

 "California" (Cole !t). 



E. decrescens sp. n. 



Diam. 0*04 to 0"0625 mm. Surface slightly convex. Colour 

 pale to dark grey. IMarkings hexagonal, areolae largest at centre and 

 decreasing uniformly towards the border, from 3 to 6 in O'Ol mm., 

 forming oblique, slightly curved, decussating, non-fasciculate rows; 



* In the figure, the processes are shown as transversely elliptical, 

 t I am informed by Mr. Hardman that the original of the sptcies is lost, the 

 slide on which it was mounted having been broken in the Post Office, 

 X In the Collection of Mr. F. Kitton. 



3 Q 2 



