FAMILY 4. PECTINACEA. 165 



PL CXVII. Fig. 4. 



Spondylus ducalis, Chemnitz, Conch., vol. vii. pi. 47. f. 477 and 478. 



Enc. Meth. pi. 193. f. 2, a, b. 

 Spondylus g cedar opus (var. ir.), Gmelin. 



PL CXVII. Fig. 5. (fossil.) 



Spondylus podopsideus, Lamarck, Anim. sans vert., new edit., vol. vii. 

 p. 192. Sowerby, Genera of Shells, No. 9. 



PL CXV1II. Fig. 6 and 7. 



Spondylus aurantius, Lamarck, Anim. sans vert., new edit., vol. vii. 

 p. 190. Enc. Meth., pi. 191. f. 3. 



PL CXIX. Fig. 8. 



Spondylus regius, Linnseus, Syst. Nat., p. 1136. Enc. Meth., pi. 193. 

 f. 1. Chemnitz, Conch., vol. vii. pi. 46. f. 471 . 



PL CXIX. Fig. 9. 



Spondylus spathuliferus (var. aurantia), Lamarck, Anim. sans vert., 

 vol. vii. p. 189. Enc. Meth., pi. 191. f. 4, 6 and 7*. 



PL CXIX. Fig. 10. 



Spondylus nudus, Chemnitz, Conch., vol. xi. p. 235. pi. 203. f. 1989 

 and 1990f. 



* The figures referred to in the ' Encyclopedie Methodique ' are evidently drawn from bad 

 specimens ; they do not, indeed, exhibit the spathulate termination of the spines described by 

 Lamarck as characteristic of this species, and which are so well developed in the specimen 

 belonging to the Rev. Mr. Stainforth, from which our drawing is taken. 



t We are much indebted to Mr. Sowerby for pointing out to us the description and figure 

 of this species in Chemnitz ; it appears to have escaped the notice of Lamarck and subse- 

 quent authors. 



