EXPLANATION OF PLATE XLVII. 



Durgella ahorense, n. sp. 



Fig. I. — Animal viewed from the right side, X4'5. 



,, la.— Do. left side, X 4-5. 



,, 16.— Shell, X 4-5. 



,, ic. — Part of the generative organs, X 8. 



„ id. — Portion of the radula, centre and admedian teeth and 

 the 30th to 34th, X 630. 



Minyongia kempi, n. sp. 

 Fig. 2. — Animal viewed from the right side, X 2. 

 ,, 2a. — Mucous pore at extremity of the foot, X 124, 

 ,, 2b. — Shell, X 12. 

 ,, 2C. — Extremity of foot from right side, X 9*25. 



,, 2d. — Visceral sac, mantle removed, showing position of shell 

 (S), br. branchial sac, and res. ap. respiratory aper- 

 ture, X 6. 



,, 26. — Visceral sac, showing position of heart, kidney and bran- 

 chial sac, X 6. 



,, 2/. — Generative organs in part, X 6, 



,, 2g. — Radula, teeth in different parts of the row, X 630. 



EXPLANATION OF LETTERING, 



Am. or. amatorial organ; alg. albumen gland; ant. anterior; post, poste- 

 rior ; hd. hermaphrodite duct ; hg. hermaphrodite gland ; br. branchial sac ; 

 gen. ap. generative aperture ; rmp. retractor muscle penis; rme. retractor eye 

 tentacle; et. eye-tentacle ; h. heart ; i. intestine ; ov. oviduct ; f. foot ; k. kidney ; 

 1. liver; p. penis; sp. spermatheca ; ot. oral tentacle; m. mantle edge or 

 muscle, 



