THE PLATES OF ANIMALS. 483 



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



1. c. d, e, its operculum. 2. Operculum of Jefrei/sia oixdina, 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, 

 lahiosa. 7. Head of R. rufilahris. 8. R. ulvce, 



Plate KK. — 1, Cceciom trachea, a. from the side ; b. from below; c. its 

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

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

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

 of ^. bilineata. 



Plate LL. — 1. and 1. a. Wassa incmssata. 2. and 2, a. N. pygmcea 

 (called N. varicosa on plate). 3. N. retieidata. 4. Pttrpura 

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

 datiom. 



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. Assiniinea 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 Mr. Hanlcy. 



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

 and 3. its head. 5. 6. 7. Cyprasa eiiropcea; and 7. its head, seen 

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



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

 culum. 3. Operculum of CeritJiium reticxdatuni. 4. Otina otis. 

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

 b. Velutina flexilis {niidicx ihe naiiiQ of V. plicatiUs). 7. Velutina 

 Icevigata. 



Plate PP. — 1. a. b. c. Lamellaria perspieua. 2. L. tentaculata (after 

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

 tagui (after a drawing by Mr. Alder). 5. N. Alderi (iV. 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. Mangclia Leufroyi; 1. b. its anterior portion ; I.e. 

 its tail. 2. a. M. brachystoma ; 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 J/, nebula. 8. M. gra- 

 cilis (after a drawing by Mr. Alder). 



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



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



