PLATE LXVIII. 



[Part Yll.—Octoher 1897.] 



Cyclophorus (Natalia) wahlbergi, Benson. Natal. 



Fig. 1. Animal viewed from right side, cf , x 4. 



1 a. Ditto, view from front and above, showing position of the male organ and 



anal orifice, x 4. 



1 b. Ditto, front view of head, showing form of mouth, X 4. 



1 c. Ditto, scar of the operculum, x 4. 



1 d. Ditto, free end of the male organ, as seen on slide with transmitted light, x 124. 

 2. Operculum, exterior side, x 2"5. 



2 a. Ditto, side view, posterior side to right hand, x 25. 



'6. Buccal plates, x 8. p., posterior side ; a.r., anterior rij^ht side. 

 '6 a. Buccal portion showing the platelets, x 275. 



3 h. Buccal portion near the central edge, where the rows of platelets are given off, 



X 275. 



4. lladula, x 163. 



4 a. Ditto, x 163. 



CvcLOPiioKus (Cyclohelix) crocatus. Born. Andaman Islands. 



5. Animal, right side, showing position of the penis, x 4. 



5 a. Ditto, from left side, x 4. 



5 b. The scar of the removed operculum, x 4. 



6. Operculum, exterior side, x 2*5. 



(i a. Ditto, side view, inner side to right, x 4. 



7. Buccal mass and salivary glands, x 4. 



8. lladula, x 58. 



0., operculum ; P., male organ; An.ap.,a.n^\ aperture ; /., tentacula ; /./., left tentaculum ; 

 b.V., base of male organ ; r.w., retractor muscle ; sal.gld., salivary glaud. 



