18 



25 

 26 

 21 

 28 

 29 

 30 

 31 

 32 

 S3 

 34 

 85 

 86 



81 

 38 



— Radians p. 165 



— Undulatus p. 1 62 



— Pectinoides app. 



— Vitreus p. 165 



— Roseus app 



— Laticostatus app. 



— Stellatus p. 163 



— Lineatus p. 164 



— Giganteusp. 164 



— Maculatusp. 164 



— Parcipictus p. 1 65 



— Multicostatus p. 



165 



Aurifiuus p. 165 

 Tessellatus p. 



166 



39 Oculatus p. 166 



40 Nodosus p. 166 



41 Pallium p. 166 



42 Bicolor p. 166 



43 Morum p. 166 



44 Nucula Nitida p. 171 



45 Myalis p. 170 



46 Mauritiana p. 1 70 



47 Tenella app 



48 Reticulata app. 



49 

 50 

 51 



52 

 58 

 54 

 55 

 56 

 51 

 58 

 59 

 60 



Lanceolata p. 167 

 Elongata p. 167 

 Crenifera p. 167 

 Parva p. 169 

 Polita p. 169 

 Costellata p. 169 

 Gibbosa p. 169 

 Elenensis p. 169 

 Eburnea p. 169 

 Cuneata p. 169 

 Nasuta p. 170 

 Striata p. 170 



PLATE XX. 



1 Nucula Rostrata p. 168 



(= Recurva p. 170 



2 Eightsii p. 169 



3 Sapotilla p. 170 



4 Limatula p. 170 



5 Proxima p. 172 



6 Fabula p. 170 



(Emarginata of Philippi) 



7 Arctica p. 168 



8* Decussata p. 171 



9 Obliqua p. 171 



* From an examination of the type of Decussata, I regard it as 

 identical with the N. Polii of Philippis' Enumeratio Molluscorum 

 Sicilise, vol. i. p. 63, t. 5 f . 10. This Mediterranean shell, which 

 has recently been discovered to be a native of our coast, also varies 

 much in contour and in the intensity of its concentric wrinkles, 

 which rarely equal those of the specimen figured in the Concho- 

 logical Illustrations. 



