THE SESSILE BATCNACLES. 



309 



CHTHAMALUS CHALLEKGERI NIPPONENSIS, new subspecies. 



Another form of C. challenged is represented by Cat. No. 48002. 

 The deeply eroded, conic wall is gray above, light brown near the 



FIG. 88. CHTHAMALDS CHALLENGERI NIPPONENSIS. SCOTUM AND TERGUM. 



base, where it is sculptured Avith many narrow ribs, sometimes 

 branching. The interior is purplish, brown and whitish, with deep 



1 



FIG. 89. CHTHAMALUS CHALLEXGERI NIPPONENSIS. a, MAXILLA, ft, MANDIBLE, c, AN IN- 

 TERMEDIATE SEGMENT OP CIRRUS VI. 



furrows corresponding to external ribs, punctate in the furrows. 

 Diameter, 9 mm. 



4729 Bull. 931021 



