884 Transactions of the Society. 



2 rounded, about 0"0125 mm. broad, their circumference almost 

 sraocith.— Bri<2;litw. Quart. Journ. Mic. Sci., 1860, p. 94, pi. v. fip;. 5. 

 Ealfe in Pritoh. Inf., p. 845. Grev, Trans. i\Iic, See. Loud., 1863, 

 p. 413, pi. ii. figs. 1-3. Sob. Atl., pi. xxxii. figs. 21, 22. Van Heurck, 

 Syn. Diat Belg., p. 209, pi. cxvii. figs. 1, 2. Raben. Alg. Europ., 

 Nos. 2487, 2i>DD, 2550, 2558. Eupodiscus scidptus W. Sm. Syn. 

 Brit. Diat., i. p. 25, pi. iv. fig. 42. 



In Rabenborst's Alg. Europ., No. 2556, tbere is noted Auliscus 

 sculpfus 7 interruptus. This specimen, which I have not seen, is by 

 b'chwarz made synonymous with A. Gregorii Janisch. 



Habitat : Poole Bay (W. Smith !) ; Lamlash (Gregory !) ; Ipswich 

 (Kitton!); sponge sand. West Indies (Dallas!); Ballast, Mediter- 

 ranean (Griffin!); Mer du Nord (Van Heurck!); "In Mare" 

 (H. L. 8mith !) ; coast of Holland (Suringav) ; coast of Denmark 

 (Heiberg) ; Mejillones, Peru (Kiuker !) ; Levant, Cuxhaven, Sheerness, 

 and Galway (Grove!); Smyrna sponges (Grove!); Auckland 

 (Cleve !) ; mud from Gliickstadt, Port William, Falkland Islands, 

 Elbe above Cuxhaven (Rabenhorst and Schwarz !). 



A. rliipis Sch. Atl., pi. xxxii. figs. 10, 11. 



Elliptical, major axis from 0"045 to 0"1 mm., 1^ to l^l.j times 

 minor. Surface with transverse median areas distinct, their outer 

 ends rounded and well marked. Colour pale grey. Central space 

 elliptical, rectangular, or diamond-shaped, 0'0075 to 0*01 mm. broad. 

 Markings striate, those converging to the processes distinct, finely 

 punctate ; those on the transverse areas faint, wide, radiating, straight, 

 or curved and diverging, the interspaces minutely and closely punctate ; 

 those around the border well defined, straight along the minor axis, 

 elsewhere convex towards the processes, the inner ends of the inter- 

 spaces rounded towards the centre at the transverse areas. Processes 

 2, round, O'Ol to 0"015 mm. broad. 



Habitat: Japan (Grundler) ; Bay of Kerguelen dredged by 

 H.]\I.S. 'ChaUenger'— IDth Jan. 1874—20 to 60 fathoms (Rae!); 

 King George's Sound (Grove !) ; Yokohama (Cleve !). 



A. intercedens Jan., Sch. Atl., pi. xxxii. fig. 9. 



Roundly elliptical, major axis 0*0875 mm., about 1^ times minor. 

 Surface with central area distinct, its outer edge convex between the 

 converging striae, reaching about 4/5 of radius from the centre and 

 passing close to the ])rocesses on their outer side. Central space 

 subcircular, about 0'015 mm. broad. Markings striate, those con- 

 verging to the processes faint, punctate, closely placed ; those on the 

 central area similar, diverging, slightly curved ; outside of the central 

 area distant, distinct, continuous, straight, along the minor axis, else- 

 where shghtly convex towards the processes. Processes 2, round, 

 • 01 mm. broad, their border narrow. 

 Habitat : Bay of Carpentaria (Janisch). 



