888 Transactions of the Society. 



with transverse median areas wide, extending almost to the processes. 

 Central space minute, 0*003 mm. broad, elongated obliquely to 

 direction of processes. Markings on transverse areas delicate, radiating, 

 punctate striae, a distinct irregular reticulum around their outer edge, 

 on peripheral side of processes short irregular costae tapering out- 

 wards, a few reaching the border.— PI. XV. fig. 7. 



Habitat: Yokohama (Hardman !j. 



Var. j'jro/«(Z^era7JS. — Major axis 0'1025 mm., about l,'^ times 

 minor. Central space rounded, • 01 mm. broad. Markings punctate 

 on the transverse areas and disposed in strands separated by hyaline 

 interspaces with irregular edges, the strands converging to the pro- 

 cesses distinct all round the latter, almost straight aljout their 

 middle, but sharplv curved at their inner ends. Processes 2, round, 

 0-01 mm. broad.— PI. XVI. fig. 6. 



Habitat: 'Challenger' trawl, 22nd January, 1875, 100 to 150 

 fathoms (Ilae !). 



Vai\ tenuis. — Major axis 0*0575 to 0*115 mm., about I^q times 

 minor. Surface with transverse areas merging gradually into those 

 rising to the processes, and having the outer ends broad, sharply 

 defined. Central space round, • 075 to • 015 mm. broad. Markings 

 minute apiculi sometimes on striae converging to processes, and upon 

 the transverse areas. Processes elliptical, • 0075 to • 01 mm. broad. 

 —PI. XVI. fig. 3. 



Habitat : Singapore (Doeg !) ; extinct crater, Cagayan Island, 

 Sulu Archipelago (0'j\leara !); from Holothurians, China (Deby !). 



Var. viutahilis. — Major axis 0*1 to 0*125 mm., 1^ to 1 ,J , times 

 minor. Colour dark brown to bluish. Central space angular or 

 elliptical, the angles sometimes extending almost to the processes, 

 0*015 mm. broad. Markings distinct, on the transverse areas ir- 

 regular, granular, in indistinct radiating and diverging rows, around 

 the border the striaj closely placed, with irregular outlines. Processes 

 2, irregularly ellij)tical, 0*02 mm. broad, their circumference with 

 minute irregularities. — PL XV. fig. 6. 



Habitat ; Yokohama (Kitton *). 



§ 11. Areolati. 



Transverse median areas, when present, with indistinct outer ends. 

 I\Iarkings irregular, pearly over general surface, or only on more 

 limited areas. Processes large. 



Auliscus fractus Grove and Kitton in litt. 



Roundly elliptical, major axis * 105 mm., about 1^ times minor. 

 Surface rising but slightly to the processes, slope at border gentle. 

 Colour smoky grey. Central space round, 0*015 mm. broad. IMarkings 

 prominent, unequal areolae, separated by narrow clear lines, converging 

 between central space and processes, elsewhere the rows straight or 



* Iti the Collections of Mr. E. Grove and :\Ir. Julieii Dc by. 



