74 ZOOLOGY OP THE VOYAGE OF H.M.S. SAMARANG. 



ad viginti, latiusculis, lineis concentricis elevatis minute et densissime decussatis, auriculis subsequalibus, 

 intus vivide carminea et alba. Adams, MS. 



Hab. China Sea. 



Several specimens of this magnificent new Pecten were collected in the China Sea, all 

 more or less brilliantly coloured in the manner described. 



2. Pecten fulvicostatus. PI. XXI. Fig. 11. Pect. testa subobliqua, multb altiore quam longa, 

 insequilatera, albida, rubro sparsirn maculata, costis fulvis, valvis subsequalibus, tenuibus, compressis, decem- 

 costatis, costis interstitiisque marginem versus elevato-striatis, auriculis valde insequalibus. 



Hab. Sooloo Arcbipelago. 



A very thin shell, rayed with ten broad yellowish ribs, very sparingly red-spotted. 



3. Pecten aukantiactjs. PI. XXI. Pig. 12. Pect. testa oblongo-orbiculari, subsequilatera, pecu- 

 liariter compressa, valva superiore planata, inferiore subconvexa, ambabus radiatim costatis, costis quatuor- 

 decim, rotundatis, sulcosis, squamis minimis per quatuor series longitudinales in costis dispositis, costarum 

 interstitiis profunde excavatis, transversim striatis, vix auriculis insequalibus ; intense aurantia, luteo et 

 violaceo maculata. 



Hab. China Sea. 



A truly beautiful species, characterized by the most elaborate and delicate sculpture, 

 with brilliant colouring. 



4. Pecten aspeeulattjs. PL XXI. Fig. 13. Pect. testa insequivalvi, sequilatera, carneola, aureo 

 variegata, rostris vivide runs, liris numerosis, irregularibus, obsolete squamulosis, asperulatis, auriculis 

 valde insequalibus. 



Hab. Corean Archipelago. 



The auricles are remarkably unequal in this species, whilst the under valve has a row 

 of denticles almost as strongly developed as in Hemipeden. 



5. Pecten denticulatus. PI. XXI. Fig. 14. Pect. testa elongato-ovata, suba3quivalvi, sequilatera, 

 tenui, compressa, radiatim lirata, liris valvae superioris ad quindecim, alternatim minoribus, angustis, squa- 

 mulis dentiformibus ornatis, valvae inferioris permultis, squamulis aculeatis, scabris, auriculis insequalibus, 

 margine cardinali valvse inferioris dentato, alterius simplici ; pellucido-lutescente, rosaceo obsolete tincta. 



Hab. Sliores of Borneo. 

 Rayed with narrow elevated ridges, surmounted with fine scales. 



tS. Pecten cristulabis. PL XXI. Fig. 15. Pect. testa subsequivalvi, suborbiculari, paululum 

 altiore quam longa, pallide carnea, rubro variegata, costis quatuor et viginti, rotundatis, liic illic subtiliter 

 squamatis, interstitiis lsevibus, margine cardinali valvse superioris simplici, inferioris cristato-crenato. 



Hab. Eastern Seas. 



Of very simple character, though not exactly agreeing with any hitherto described 

 species. 



