A Revision of the Genus Auliscus Ehrh., &g. By J. Rattraij. 887 



Yar. major, Sch. Atl., pi. Ixvii. fig. 11. — Major axis 0'14 to 

 0*15 mm., about 1-^ times minor. Central space rounded or bluntly 

 angular. Markings punctate on transverse median areas, in strands, 

 widening towards their outer ends, narrow and in uniformly curved 

 sigmoid or flexuous bands towards the processes, interspaces between 

 costse at border minutely punctate. — A. sculpius, var. permagna 

 Witt, Sch. Atl., pi. cxvii. fig. 4. 



Habitat : ^gina (Ehrenberg) ; Santa Monica deposit (Eae !) ; 

 Mejillones, Bohvia (Witt) ; jMoron deposit (Greville !). 



Var. eonstricta. — IMajor axis ' 075 mm., about 1^ times minor. 

 Surface with transverse median areas short and narrow. Central space 

 round, O'Ol mm. broad. Markings costate, those converging to the 

 processes as distinct as those passing to the border, on the transverse 

 areas more delicate. Processes 2, about midway between central 

 space and border. — PL XV. fig. 8. 



Habitat : Moron deposit (Johnson !) ; Tamatave (Grove !) ; Mejil- 

 lones (Deby !). 



Var. impressa. — Major axis 0*0575 to 0*065 mm., about 1^ to 

 l-jig times minor. Surface rising but slightly near the processes, the 

 transverse median areas indistinct or absent. Markings costate, those 

 passing to the border flexuous or simply curved, sometimes anasto- 

 mosing, their inner ends distinct, passing inwards to the central space. 

 — PI. XV. fig. 9. — A. seuljptus vaj-., Leud.-Fort. Diat. CevL, pi. vii. 

 fig. 67. 



Habitat : West Port Bay (O'Meara !^ ; Arran Island (Greville !). 



Var. late-costata, Sch. Atl., pi. xxxii. figs. 16-20. — Major axis 

 • 0425 to • 0625 mm., about ly'^ ^^ 1 iV times minor. Sm-face with 

 transverse median areas sometimes narrow and short. Markings 

 costate, placed at wide internals, at outer ends of the transverse areas 

 an irregular faint reticulum and sometimes minute apicuh. — A. sculptus 

 var., Leud.-Fort. Diat. Ceyl , pi. vii. fig. 66. 



Habitat : Bass Straits (Johnson !) ; Newcastle deposit, Barbadoes 

 (Doeg !) ; Yokohama (Hardman !) ; Holothurians, Java (Kinker !) ; 

 Campeachy Bay (Grundler). 



Var. mergens. 



A. cselatus var., Sch. Atl., pi. xxxii. figs. 12-13, 23. 



Major axis 0*07 to • 09 mm., about 1^ times minor. Surface 

 with outline of transverse median areas indefinite. Central space 

 roundly elliptical, long axis in line of processes, O'Ol mm. broad. 

 Markings : the lines converging to the processes uniformly curve 1, 

 closely placed, those diverging from outer ends of transverse areas to 

 border often more distinct than others nearer the processes, transverse 

 areas punctate. 



Habitat: Moron deposit (Weissflog) ; Oamaru deposit (Pi. Piat- 

 tray !) ; Tamatave (Grove !) ; King George's Sound (Grove !) ; Port 

 Lincoln, Australia (Schmidt). 



Var. pida. — Major axis 0-12 mm,. If times minor. Surface 



