86 LAND AND FRESHWATER MOLLUSCA OF INDIA. 



EXPLANATION OF PLATE LXXXI. 



Fig. L Hemi'plecta humphreysiana, Lea : central tooth, x 3G8. Singapur. 



1 a. Ditto : central teeth, X 275. 



1 b. Ditto: 27th, 28tli, and 29th centrals, X 368. 



1 c. Ditto: .59th, GOth, and 61st laterals, X 368. 



1 d. Ditto: 132nd, 133rd, and 134th laterals, X 368, and outermost teeth. 



1 e. Ditto : jaw, x 8. 



2. Hemiplecta densa, Adam.s & Reeve : central teeth, X 368. Borneo. 

 2a. Ditto: 16th, 17th, and 18th median teeth, X 368. 



2 b. Ditto : three laterals, x 368. 



2 c. Ditto : jaw, x 8. 



3. Nilffiria tranquebarica, Fabr. : mantle-edge and dorsal lobes removed, 



X 2. Madras. 



3a. Ditto: genitalia, x 4. 

 ^b. Ditto: anotlier specimen, X 4. 



3 c. Ditto : spermatophore, x 8. 



3 d. Ditto : ditto, portion near base of the sac, X 24. 



4. Nilgiria bistrialis, Beck : genitalia, X 4. Madras. 



4 a. Ditto : the basal portion of amatorial organ, showing the " rod- 



point," or virgula amatoria. 



EXPLANATION OF PLATE LXXXII. 



Fig. 1. Hemiflecta uier^lheohzXA: jaw, x 8. Tenasserim. 



1 a. Ditto : central teeth, x 368. 

 1 b. Ditto : median teeth, 13th to 16th, x 368. 



1 c. Ditto : laterals, 52nd to 56th, X 368. 

 \ d. Ditto: outer laterals, X 368. 



2. Nilgiria solata, Bs. : jaw, X 8. Nilghiri Hills. 



2 a. Ditto : central teeth, x 275. 



2 b. Ditto : median and transition teeth, 17th to 23rd, X 275. 



2 c. Ditto : three laterals, x 3(i8. 



3. Nilgiria tranquebarica, Fabr. : jaw, X 8. Madras. 



3 a. Ditto : central teeth, X 275. 



3 b. Ditto : median teeth, 17th to 20th. X 368. 



3 c. Ditto : laterals, X 368. 



4. Ariopha7ita Icsvipcs, Miiller : jaw, X 8. Bombay. 



4 a. Ditto: central teeth, x368. 



4 b. Ditto : median teeth, 8th to 12th, x 368. 

 4 c. Ditto : laterals, 101st to 104th, X 368. 



4 d. Ditto : six outermost teeth, x 368. 



5. Nilgiria bistrialis, Beck : jaw, x 8. Madras. 



5 a. Ditto : two centre teeth, x 368. 



5 b. Ditto : median teeth, 18th and 19th ti'ansition teeth, x 308. 



5 c. Ditto : middle laterals, X 368. 



5 d. Ditto : outermost teeth, x 368. 



6. Ariophanta immerita, W. T. Blf. : jaw, X 8. South India. 



6 a. Ditto : three central teeth, x 196. 



6 b. Ditto : median transition teeth, 24th to 26th, x 196. 



6 c. Ditto : laterals, 38th, 39th, and 40th, X 196. 



7. Ariophanla cgsis. Benson : central teeth, X 196. Nilghiri Hills. 



7 a. Ditto: median transition teeth, 21st, 22ud, and 23rd. 

 7 b. Ditto : three laterals, X 196. 



7 c. Ditto : five outermost teeth, x 196. 



8. Ariophanta? bajadera, Pfr. : three central teeth, X 368. Bombay. 



8 a. Ditto : median transition teeth, 22nd and 23rd, X 368. 

 8 6. Ditto: lateral teeth, 33rd, 34tli, and 35th, x 368. 



