PLATE LXXXI. 



[Piirt VIU.— January 1898.] 



Fig. 1. Hemiplecta HUMPHRBYsiANA, Lea : central tooth, x368. Singapur. 



1 a. Ditto : central teeth, x 275. 



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



1 c. Ditto: 59th, 60th, and 61st laterals, x 3G8. 



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



1 e. Ditto : jaw, x 8. 



2. Hemiplecta densa, Adams & 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. Nilgiria tranquebarica, Fabr. : mantle-edge and dorsal lobes 



removed, x 2. Madras. 



3 a. Ditto : genitalia, x 4. 



3b. Ditto: another specimen, x 4. 



3 c. Ditto : spcrmatophore, 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." 



