A Revisioyi of the Genus Auliscus Ehrh., &c. By J. Rattray. 899 



31. The central portion distinct. Strise distant, at border concave 



towards processes .. elegnnx. 



„ „ faint opposite the central space. Striae 



crowded amoenus. 



32. The central portion continued round outer side of processes, 



protruding between these opposite the 



central space intercedens. 



„ „ reaching the processes. Markings in in- 



terrupted strands radiating from central 



space suhspeciosug. 



30. A clear curved band at sides of central space. Markings 



granular Clevei. 



No such band 33 



33. On each side of valve 3 symmetrical lines diverging from 



central space towards border Uneatus. 



No such diverging lines 34 



34. Markings punctate, without order nanus. 



„ obscure 35 



„ delicate strise 36 



„ distinct 37 



35. A clear irregular narrow band, radiating from central space to 



border at sides of converging strise. Processes 2 . . . . barbadensia. 

 No such band 38 



38. Apiculi few at border and midway between processes. Pro- 



cesses 3 Caballi. 



„ on a narrow band around centre and at border. Pro- 

 cesses 2 punctulatus. 



36. Apiculi at border only, between processes. Processes 2, large nebulo-pundatus. 



„ prominent, chiefly at border and around central space normanianus. 



„ „ numerous, absent only from central space punctatus. 



„ aggregated on a narrow band around border, about tlie 

 processes, and on narrow bands at or within semi- 

 radius, and concave outwards at the middle . . . . Stockliardtii. 



„ minute, numerous. Strise between central space and 



processes straight australiensis. 



„ „ at border. Rounded granules aggregated 



around central space euperbus. 



„ most evident around border. Strise most evident around 



central space formosus. 



37. The strands of markings diverging from central space distant, 



often interrupted interruptus. 



„ „ irregular, broadest but unequal around 



central space Hauckii. 



„ „ interrupted to form round or irregular 



patches, curved, pruinose, towards 

 the border crowded, without order rugosus. 

 Strise coarse; irregular, radial and diverging from central 



space, at border delicate. Apiculate . . . . , . . . moronensis. 

 „ forming subregular sharp rough lines, with shorter lines 



around border. Apiculi minute, scattered confluens. 



„ rough, more closely placed, radial and diverging. Non- 



apiculate pruinosus. 



„ diverging from central space to border, straight or sig- 

 moid, distant, convex towards the processes .. .. incertus, 

 „ course, interrupted towards central space. Processes 



small, high acutiusculua. 



23. Transverse areas with outer ends faint 39 



„ „ „ ,, distinct 40 



39. Diverging strise interrupted near central space, faint at border. 



Non-apiculate caribous. 



Strise faint, continuous. Processes small, high, with free ends 



convex obscurus. 



Markings otherwise 41 



41. Markings in radial strands expanding regularly to border, 



lines converging to processes sharply curved at inner ends, 



almost straight on outer portion intermedius. 



No such strands 42 



