SPONDYLUS. 



Plate XIII. 



Species 46. (.Mus. Cuiuiiig.) 



Spondyli's longitudinalis. Spoiid. testa oblongo-ovald, 

 crassi/iscuM, dense cosiaict et lirata, liris muricato- 

 spinosh, codis confertim rude sqnamatis, squamis erec- 

 tk, coticavis ; purpureo-nhldd, sqnmms pullidi s/ra- 

 rdiiieis. 



The longitudinal Spondylus. Shell oblong-ovate, 

 rather tliick, densely ribbed and ridged, ridges prickly 

 spined, ribs closely rudely scaled, scales erect., con- 

 cave ; purple-red, scales pale straw-colour. 



Lamarck, Anim. sans vert. vol. vii. p. li)0. 

 Spond'i/lns 7nuUila»u'lhitm, Cheiiu. 



Hab. West Indies. 



It is impossible to determine which is the species La- 

 marck had in view for his S. longitudinaUs, either by his 

 description or reference to Chemnitz. The shell here 

 figured having been selected by INIr. Sowerby as the type 

 of S. longitudinalk, it may, in this state of uncertainty, 

 be fairly retained. 



Species 47. (Mus. Cuming.) 



Spondylus castus. Spond. testa depresse ovatd, versus 

 nmljoncm sttbatteimatd, radiatim liratd et siriatd, liris 

 longis plano-depressis copiose armatis ; Candida, ma- 

 culisferrugineo-fuscisprope umhouem radiatim tinetd. 



The chaste Spondylus. Shell depressly ovate, rather 

 attenuated towards the umbo, radiately ridged and 

 striated, ridges copiously armed with long slightly 

 depressed spines ; wiiite, stained near the umbo with 

 rays of rust-brown spots. 



Ifa'j. Philippine Islands ; Cuming. 



A delicate profusely spined species, distinguished by 

 the thinly iiattened structure and depressed position of 

 the spines. 



Species 48. (olim Mus. Sowerby.) 



Spondylus fragilis. Spond. testa tenui, ovali, teiuiis- 

 sii/ie striaid, auricuUs panis ; sqnamis erectis, tenuis, 

 niat/erosis, palmatis, subdivisis 2>sr series sex pricipa- 

 libus, alternis minoribus, acideatis dispositis ; inters/ i- 

 tiis imbricatis ; colore paUidissinie fulvd, prope uni- 

 bonem macnlis fuscis interrtiptim radiato, ad interstiliis 

 piinctato, ad squamas roseo-tincto : imlrd inferiori 

 nculeatd, inter spinas scabrlcnld. 



The fragile Spondylus. Shell thin, oval, very finely 

 striated, auricle small; scales erect, thin, numerous, 

 pahnated, subdivided in six principal rows, alter- 

 nately smaller, prickly ; interstices imbricated ; very 

 light fulvous, interruptedly rayed near the umbo with 

 brown spots, dotted at the interstices, stained with 

 rose at the scales ; lower valve jirickly, rough between 

 the spines. 



SowEKBY, Thesaurus Conch, vol. i. p. 43(j. 



Hah. ? 



The accompanying figure is enlarged from a reduced 



representation, in Sowerby's ' Thesaurus Conehyliorum,' 



of a shell formerly in the collection of the late Mr. G. 15. 



Sowerby, Sen. The description is also quoted from the 



same work. 



Fig. 31 /a (Mus. Cuming.) 

 A fine adult specimen of S.fiahellmn tigiu-ed at PI. \'i. 

 in a young state. 



