PLATE XCI. 



[Part 'iX.—JS'ovember 1899.] 



AUSTENIA GURHWALENSIS, 11. Sp. GurllWal. 



Fig. 1. Shell, frout view, x 2'4. 

 1 a. Ditto, from above, x 2'4. 

 1 /i. Sculpture of, on body-whorl, x 58. 

 1 r. Jaw, X 8. • 



1 (/. Central teeth of radula, x 368. 

 1 e. 22nd, 23rd, and 24th median teeth, X 3G8. 

 1 /. 26th, 2rth, and 28th lateral teeth, x 368. 

 1 ff. Outermost laterals, x 368. 



1 //. The amatorial organ, x 4. 



AusTENiA PAURHiENSiSj u. Sp. Gurhwal. 

 Fig. 2. Shell, frout view, x 2'4. 



2 a. Ditto, from above, X 2-4. 



2 b. Animal with shell removed, right side, showing mantlc-lobcs, x 4. 



2 c. Ditto, left side, showing mantle-lobes, x 4. 



AuSTENlA SHANENSIS, u. sp. Siiau States. 

 Fig. 3. Shell, from above, x 2-4. 



3 a. Ditto, from below, x 24. 



3 b. Animal from right side, portion only well preserved, x 2. 



3 c. Spermatophores, X 8. 



3 d. Lateral teeth of radula, x 368. 



3 e. Outside laterals, x 368. 



AusTENiA PLANospiUA, Bs. Sikklm. 

 Fig. 4. Anterior end of the amutorial organ, x 12. 



