SFONDYLUS. 



Plate VIII 



Species :J8. (Mus. Cumiug.) 

 Sponuvlus impeeialis. Spond. testa trigono-ovatd, sub- 

 mwpremi, valvia mpmlibus, radiathn, crebricostatd, 



.',',. s, ^„ ;,,.■,, ,'/,',,v,v longkp'mosis, spinis fortibm 

 ; ' -> , . / riroatatis, costis squamis acutii 



,/' , v" ,.,■,. , ■:■,: . I-' , •-ranicu. 



TnK IMPERIAL Sfoxdvlus. Shell triangularly ovate, 

 rather compressed, valves equal, radiately closely 

 ribbed, six principal ribs long-spined, spines strong, 

 appressed, interstices three-ribbed, ribs densely set 

 with sharp prickly scales ; rose-flesh colour. 

 C;he.\u, Couch. Illus. p. G. pi. 26. f. 2, 3. 

 Hub. China. 



This very beautiful, but not uncommon species, is very 

 closely allied to S. regius, and is characterized by the same 

 plan of sculpture, but the shell is uniformly more com- 

 pressed, and the prickly scales of the interstitial ribs more 

 sharply developed. 



Species 29. (Fig. a, b, Mus. Cuming.) 

 Spondylus zoNALis. Spotid. testa ovatd, vatde irregn- 

 luri, profuse radiatim liratd, liris plus mimis obsoletis 

 rude Jlexnosis, brevisquamatis, squamis irregulariter 

 acideatis, cuca umlonem magis aculeatis ; alba, nigro- 

 punctatd, deinde purpurea autfusco conceutrice zonatd, 

 squamis interdum aurantio-luteis. 

 The zoned Spondylus. Shell ovate, very irregular, 

 profusely radiately ridged, ridges more or less obso- 



lete, rudely flexuous, shori-scaled, scales u-rcgularly 

 prickly, more prickly round the umbo ; white, black- 

 spotted, then concentrically zoned with ])urple ov 

 brown, scales sometimes orange-yellow. 



Chenu, Illus. Conch, pi. 7. f. 3 and 1. 

 Spondylus Iterinaceus, Chenu. 



Hub. Mauritius, Australia, and Philippine Islands, 



Of rude flexuous growth, promiscuously bristleil 



throughout with irregular short prickly scales. 



Species 30. (Mus. Cuming.) 

 Spondylus Lamarckii. Spotid. testa ovatd, Fectirdformt 



radiatim costatd, costis obtusis, subdistani 



bus, rude Jiexuosis, lavibus, aculeis parv/s perpaucis 

 prope miibonem ; c<Brulescente-albd, purpureo-radiatd. 

 Umbo interno intense purpurea. 

 Lamarck's Spondylus. Shell ovate, Pecten-shaped, 

 u'regular, radiately ribbed, ribs obtuse, rather dis- 

 tant, rudely flexuous, smooth, with a few small 

 prickles near the umbo ; bluish-white, purple-rayed, 

 inner lip deep purple. 

 Chenu, Conch. Illus. p. 6. pi. 'J. f. 4. 



Hub. ? 



A very characteristic Pecten-like species, chiefly distin- 

 guished by its comparatively smooth, widely rayed, flattened 

 ribs ; but liable to be confounded with worn specimens of 

 S. ducalis. 



February, 18.56. 



