186 BULLETIN 37, UNITED STATES NATIONAL MUSEUM. 



PLATE XXX. 



FIG. 1. Pleurotomaria Adansoniana C. & F. Redrawn by McConnell from water- 

 color sketch from life by J. H. Blake. The shell is merely indicated. 



2. Anterior termination of gill in P. Adansoniana. a, osphradium ; b, blood 



sinus (?). Only the inner series of gill lamellae is here indicated. At this 

 part of the gill they are narrow and pointed ; farther back they become 

 broader and more rounded at the distal end. 



3. Posterior free termination of intestine (c) lying on the glandular (renal ?) 



organ, behind which in the commissure are two orifices on each side (a), 

 with a short bunch of papillae behind them and the flaps of the mantle 

 with their papilose edges (b) corresponding to the edges of the sinus on 

 each side. 



4. Another specimen. 



5. The first specimen crawling. 



6. The head, viewed from above. 



PLATE XXXI. 



FlG. 1. Pleiirotomaria Quoyana F. & B. Rbachidian and lateral teeth much mag- 

 nified. 1 b, one of the outermost uncini ; 1 c, one of the inner tricuspid 

 uncini greatly magnified. 



2. Propilidium ancyloide Forbes. Transverse row of teeth from above. 2 b, 



rhachidian and lateral teeth in profile; 2 c, jaw. All much magnified. 

 Scandinavia and Britain. 



3. Pleurotomaria Adansoniana C. & F. Separated teeth numbered in their 



order from the rhachis ; o, rhachidian tooth. 



4. General view of a single transverse row of teeth. 



5. Same, a single tufted uncinus; H a - 



6. Same, end of tufted uncinus ; H 2 - 



7. Cocculina spinigera Jeffreys. Penis from above magnified. 



8. Cocculina spinigera Jeffreys. Head from above, showing tentacles and posi- 



tion of penis at the side of the right tentacle, magnified. 



9. Rhachidiau tooth of C. spinigera. 



10. Scutellina antillarum Shuttleworth. Showing rhachidian tooth laterals and 



consolidated unciiii of one s,ide f & single transverse row of the radula; 



4 fl . 



11. The same, a single separated uncinus. 



PLATE XXXII. 



FIG. 1. Calliostoma (Eutrochus) cincte1lumDa.il; 8.0. 



2. Pleurotoma ptriscelida Dall; 40.5. 



3. Calliostoma (Eucasta) indiana Dall; 7.6. 



4. Calliostoma (Eutrochus) cinctellum Dall ; 9.5. 



5. Calliostoma (Eucasta) indiana Dall; 8.5. 



6. Liotia (Lippistes) acrilla Dall; 4.3. 



7. Calliostoma (Eutrochus) Benedicti Dall; 18.0. 



8. Margarita (Bathymophila) euspira Dall; alt. 5.75 j max. diarn. 7.0. 



9. Liotia (Lippistes) amabilis Dall ; 5.0. 



10. Pleurotomaria Adansoniana C. & F. ; 35.0. 



11. Liotia (Lippistes) acrilla Dall ; 4.3. 



12. Liotia (Lippistes) amabilis Dall; 5.0. 

 12 a. Nassarina Grayi Dall ; 12.0. 



