O SYSTEMATIC ARRANGEMENT 



In P. balylonica the eye-peduncles are thick, cylindrical, annn- 

 lated, with large black eyes at the end. The tentacles are short, 

 subulate, blunt, on the outer side of the tip of the eye-peduncle. 

 The operculum ovate, acute, subannular, with an apical nucleus 

 (fig. 5).' 



4. Drillia. 



Shell turrited ; mouth ovate ; canal short. Operculum ovate, 

 acute ; nucleus apical. Eyes on upper part of tentacula. 



1. D. , t. 84 a. f. 2. 



2. D.?echinata, t. 91. f. 4. 



3. D. cagayanensis, Adams, Gen. Moll. t. 10. f. 2. 



4. D. alabaster, Adams, Gen. Moll. 1. 10. f. 2 a, b, operculum only. 



5. D. maculata. 



6. D. flavidula. 



7. D. funiculata. 



8. D. Maravignse. 



5. Bela. 



Shell fusiform and subturrited ; whorls waved or smooth ; outer 

 lip simple, or with a very slight sinus at the hinder end near the 

 suture. Operculum ovate, acute. Eyes on the upper part of the 

 tentacles. 



1. B. Turricula, Forbes fy Hanley, B. M. t. T.T. f. 2. 



2. B. septangularis, Forbes fy Hanley, B. M. t. T.T. f. 3. 



3. B. rufa, Forbes fy Hanley, B.M. t. T.T. f. 4. 



4. B. nobilis, Adams, Gen. Moll, t. 10. f. 3 a, b, operculum only. 



c. Defranciina. Operculum none. 



6. Defrancia. 



Shell fusiform or subturrited ; mouth ovate ; canal short ; outer 

 lip slightly nicked behind. 



"Tentacula setaceous. Eyes subpedicelled. Foot depressed, 

 two-lobed and horned in front. Operculum none. B. lineata"— 

 Lovin. 



1. D. multilineata, Fig. Moll. t. 90. f. 2, t. 105. f. 5. 



2. D. Lefroyi, Forbes fy Hanley, B. M. t. E.R. f. 1. 



3. D. brachystoma, Forbes $■ Hanley, B. M. t. R.R. f 2 



4. D. teres, Forbes 8f Hanley, B. M. t. R.R. f. 3. 



5. D. costata, Forbes $■ Hanley, B. M. t. R.R. f. 4. 



6. D. attenuata, Forbes fy Hanley, B. M. t. R.R. f. 5. 



7. D. linearis, Forbes #■ Hanley, B. M. t. R.R f G 



8 ' D- j£ft.?£f" o Hanley ' B ' M ' u KR- f- 7; Adatns > Gen - 



9. D. gracilis, Forbes fy Hanley, B. M. t. R.R. f. 8. 



