52 



ZONITIDJE. 



striated or costulate above, the ribbing decussated by impressed 

 lines and in many species bearing rows of small moniliform 

 tubercles ; smoother below ; peristome thin, columellar margin 

 more or less reflected. 



[Fig. 30. A. Euplecta partita, p. 65. Genitalia, x3*3 ; part of the male organ 

 showing sperraatophore forming near the junction of the vas 

 deferens, X6; and the dorsal lobes, X 3'3. 



B. Euplecta semidccussata, p. 57. Jaw, X 6 ; transition and first 



lateral teeth of radula, X 146. 



C. Euplecta binoyaensis, p. 62. Part of generative organs showing 



spermatophore in process of formation, X 9'4. 



D. Euplecta prceerninens, vide travancorica, p. 59. Shell- and dorsal 



lobes, X 3'3 ; jaw, x 6, and teeth of the radula, X 276; and 

 the extremity of the foot, mucous gland with overhanging lobe, 

 X 6. 

 For explanation of letters in italics and numbers see figs. 2, 3, 4, and 16.] 



