430 



S. testa alba ; costis numerosis, inequalibus, angulatis, monili- 

 feris, nonnunquara rubris ; interstitiis striatis. 



The ribs are numerous, unequal, angular, with little raised 

 bead-like notches, which in some specimens are of bright scarlet 

 colour. We had doubtfully identified this species from the very 

 slender materials afforded by Lamarck's description, previously to 

 seeing Chenu's figure of Lamarck's shell confirming our view. 



Mr. Cuming's specimens are from Lord Hood's Island. 



32. Spondylus nudus (pi. lxxx-\aii. f. 39, 40.), Chemn. 

 vol. ii. p. 235. pi. 203. f. 1989,1990. 



S. testa subtriangulari imbricatim striata; auriculis parvis; 

 area cardinaH elongata ; costis 6 albis, parvis, numerosis, minutis- 

 sime noduliferis; colore rubro. Variat albo, rubro radiatim striato. 



A small solid species, with narrow auricules and lengthened 

 cardinal area, covered with minute beaded ribs. The colour is red, 

 with six or seven of the principal ribs white ; it also occurs white, 

 broadly striped with red. 



The former variety is from the Red Sea, the latter is from the 

 PhiDippine Islands. 



33. Spondylus Gussoni (pi. Ixxxix. f. 54.), Costa, Philippi, 

 Enum. Mollusc. Sicil. vol. i. p. 87. S. minimus, Chenu, Illust. 

 conch. ? S. albus, B. M. S. albidus, Brod. Proc. Zool. Soc. 1836, 

 p. 43. 



S. testa parva, tenui, ovali, striata, alba ; striis minutissime im- 

 bricatis. 



A small, tliin, white, oval, minutely striated shell, mth the 

 striae minutely imbricated. We cannot perceive the difference 

 between this shell and S. minimus of Chenu, or the one named S. 

 albus in the British museum. 



From the Mediterranean. 



34. Spondylus coccineus (pi. Ixxxviii. f. 47.), Lam., Anim. 

 s. vert. vol. vi. p. 190. 



S. testa purpurea, prope umbones radiatim rubro variegata ; 

 costis vix elevatis, numerosis ; spinis insequalibus, brevibus validis. 



The distinction between this species and the variety of S. spa- 

 fkuliferus most nearly resembling it (fig. 61), is that the former is 

 covered by numerous short spines, while the spatknlce of the 

 latter are less numerous and more distant. It is uncertain whether 

 fig. 56, which at p. 419 is included as a variety of S. longitudi- 



