THE PLATES OF ANIMALS, 483 



Plate JJ. — 1. and 1. a. Jeffreysia diaphana; 1. b. part of its head ; 



1. c. d. e. its operculum. 2. Operculum oi Jeffreysia opalina, all 

 from drawings by Mr. Alder. 3. Rissoa ahyssicola. 4. R. cin- 

 gillus; and 4. a. its operculum. 5. R. parva. 6. Head of R. 

 labiosa. 7. Head of R. riifilabris. 8. R. vivce. 



Plate KK. — 1, Ccecurn trachea, a. from tlie side ; b. from below; c. its 

 head. 2. Eulima polita, var. nitida (wrongly labelled E. nitida 

 on plate). 3. a. and b. E. polita, typical form (wrongly E. nitida, 

 var. polita, on plate). 4. a. and b. E. distorta. 5. Anterior portion 

 of ^. hilineata. 



Plate LL. — 1. and 1. a. Nassa incrassata. 2. and 2, a. N. pygmaia 

 (called N. varicosa on plate). 3. N. reticulata. 4. Purpura 

 lapillus; and 4. a. its head, seen from above. 5. Buccinum un- 

 datum. 



Plate MM. — 1. Spirialis Flemingii, from living specimens off the 

 coast of Skye. 2 a. and b. Jeffreysia opalina, after a drawing by 

 Mr. Alder. 3. a. and b. Assiminea littorea (see Appendix): this is 

 the Rissoa littorea of Plate Ixxxi. figs. 6 and 7, after living speci- 

 mens taken on the coast of the Isle of Wight. 4. Rissoa vitrea, 

 from a specimen taken off Oban. 5. Aclis supranitida, after a 

 sketch by ]\Ir. Hanley. 



Plate NN. — 1. 2. 4. Ovida patida (under the name Volva patula) ; 

 and 3. its head. 6. 6. 7. Cyprcea europtea; and 7. its head, seen 

 from below. 8. Marginella loevis ; and 9. its head. 



Plate 00. — 1. a. b. and c. Cerithiopsis tubercular is ; and 2. its oper- 

 culum. 3. Operculum of Cerithium reticidatum. 4. Otina otis. 

 5. Stilifer TuHonis. (All from drawings by Mr. Alder.) 6. a. and 

 b. Vehitinaflexilis{\x\\<\.Gx\\\G\\wi\&oiV.plicatilis). 7. Velutina 

 laevigata. 



Plate PP. — 1. a. b. c. Lamellaria perspicua. 2. L. tentacidata (after 

 a drawing by Mr. Spence Bate). 3. Natica sordida. 4. N. Motv- 

 tagui (after a drawing by Mr. Alder). 5. N. Alderi {N. nitida of 

 text). 6. N. monilifera (lettered N. canrena by a mistake); and 

 7. a. and b. its nidus (after drawings by Mr. Spence Bate). 



[Plate QQ, no such plate]. 



Plate RR. — 1. a. Mangelia Leufroyi; 1. b. its anterior portion ; 1. c. 

 its tail. 2. a. M. hrachy stoma ; 2. b. its anterior portion ; and 2. c. 

 its tail. 3. a. M. teres; and 3. b. its head. 4. a. M. costata (after 

 a sketch by Mr. Alder) ; 4. b. its head, from another drawing. 

 4*. its lingual denticles. 5. Head and anterior parts of M. attenu- 

 ata. 6. M. linearis. 7. Head and tail of 3L nebula. 8. 31. gra- 

 cilis (after a drawing by Mr. Alder). 



Plate SS. — 1. Fusus propinquus, (drawn from life by Mr. Alder). 



2. a. Fusus islandicus ; 2. b. its head ; and 2. c. its lingual denti- 



