378 Transactions of the Society. 



Habitat : Sta. Barbara deposit (Eae !). 



Var. juUanclica. A. jiitlandicus Kitton, Journ. Queck. Mic. CI., 

 1885, p. 168, pi. xiii. fig. 3.— Diam. 0-1175 min. Surface flat to 

 about 1/6 of radius, thence primary rays continued on same plane to 

 processes, inflations at outer ends low, wide. Central space rounded, 

 about 1/23 diam. broad. Markings 6 to 8 in 0*01 mm., secondary 

 oblique rows distinct around processes. Processes 4, insertion about 

 1/3 of radius from circumference, small hourglass-shaped, proximal 

 portion somewhat smaller than distal. — Sch. Atl., p. xli. fig. 5. 

 A. crux var. glacialis Grun., Denk. Wien. Ak., 1884, p. 69, pi. ii. (B), 

 fig. 62. Sch. Atl., pi. xli. fig. 5. 



Habitat : Fuur, Jutland (Kitton ! Weissflog !). 



§ 12 Speciosi. 



Surface highest at centre. Markings sometimes pearly, rows 

 radial, subradial or parallel, interspaces hyaline. Primary rays dis- 

 tinct, rarely inconspicuous, sometimes slightly elevated above level of 

 adjoining area. 



A. neglectus sp. n. — Diam. 0'2 mm. Surface flat to about semi- 

 radius, thence slope to border gradual, primary rays on a level with 

 adjacent areas. Colour pale to slaty grey. Central space irregularly 

 quadrangular, punctate, about 1/24 of diam. broad. Markings mostly 

 quadrate, in contact, 4 in 0*01 mm., somewhat pearly, interspaces 

 at origin of shorter rows or as interuptions in course of longer rows, 

 rows deflected slightly at processes, moniliform at border, secondary 

 regular concentric bands distinct to zone of processes. Primary rays 

 inconspicuous, rows diverging a little at their outer ends. Border 

 striae 12 in 0*01 mm., about 1/40 of radius broad, a dark line at its 

 middle or inner third, outside of this striae more faint. Processes 

 12, insertion about 1/7 of radius from circumference, proximal portion 

 wider than more cylindrical distal, constriction slight, free ends 

 convex, length 1\ times breadth. — PI. VI. fig. 1. At edge of scar of 

 broken-off processes there is a circlet of minute puncta. 



Habitat : Sta. Monica deposit (Bae !). 



A. umhonatus Grev., Trans. Mic. Soc. Lond., 1864, p. 9, pi. i. 

 fig. 2. — Diam. ■ 095 mm. Surface, central portion flat to about 

 semiradius with outer edge rounded abrupt, adjacent area on compart- 

 ments also flat, slope to border steep, primary rays somewhat above 

 level of adjoining areas. Colour pale grey, darker about elevated area. 

 Central space angular, 1/19 of diam. broad, punctate. Markings 

 subquadrate, 4 in • 01 mm., without interspaces, more irregular on 

 raised central area, decreasing irregularly outside zone of processes, 

 rows straight parallel, secondary almost straight rows parallel to each 

 other, and to a tangent to circumference at middle of compartments. 

 Primary rays distinct, rows diverging widely in a V-shaped manner 

 on outer 1/3 of length, prolonged past processes to border. Border 

 granules 8 in • 01 mm. Processes 7, insertion about 1 /5 of radius 

 from circumference. 



