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SPONDYLIDJ!. 



Syn. Podopsis, Lam. (foss.) Dianchora, Sow. (foss.) 

 Pachytes, Defr. (foss.) 



Ex. S. gasderopus, Linnaeus, pi. 128, fig. 3, 3, a. 



The "Thorny Oysters" inhabit the coasts of Western 

 America, the Pacific Islands, India, Australia, and the 

 Mediterranean. They are usually found in deep water, 

 adhering to rocks and coral. The valves are adorned 

 with spines, and are often vividly coloured. From the 

 fact of cavities containing fluid being found in the inner 

 layer of the shell, they are sometimes termed " Water 

 Clams." 



Species of Spondylus. 



aculeatus, Chem. 

 affinis, Reeve. 

 albibarbatus, Reeve. 

 Americanus, Lam. 

 armatus, Sow. 

 asperrimus, Sow. 

 aurantius, Lam. 

 barbatus, Reeve. 

 basilicus, Reeve 

 Butleri, Reeve. 

 calcifer, Cpr. 

 camurus, Reeve. 

 Candidas, Lam. 

 castus, Reeve. 

 chelouia, Reeve. 

 ciliatus, Brod. 

 coccineus, Lam. 

 croceus, Chem. 

 Cumingii, Suiv. 

 cuneus, Reeve. 

 digitatus, Sow. 



ducalis, Chem. 

 electrum, Reeve. 

 erinaceus, Reeve. 

 fiabellutn, Reeve. 

 foliaceus, Chem. 

 fragilis, Sow. 

 fragum, Reeve. 

 gasderopus, Linn. 

 gilvus, Reeve. 

 gracilis, Chem. 

 Gussoni, Costa. 

 hystrix, Reeve. 

 ictericus, Reeve. 

 imbutus, Reeve. 

 imperialis, Chenu. 

 Lamarckii, Chenu. 

 Layardi, Reeve. 

 leucacantba, Brod. 

 limbatus, Sow. 

 liugua-felis, Sow. 

 longitudinalis, Lain. 





