COMPLETE GRAU : PECTINIDAE OF THE EASTERN PACIFIC 47 



Geochronological range'. Reported only from the Recent. 

 Bathyrnetric range. 30 to 1100 fathoms (rarely less than 300). 

 Ecological data: Usually found on mud bottoms, occasionally on 

 and/or in sponge. 



Hancock Expeditions Collecting Stations: 

 SOUTHERN CALIFORNIA and SANTA BARBARA ISLANDS: 

 9 stations ; 420-950 fathoms, green or gray-green mud bottoms, as- 

 sociated with glass sponge and chaetopterids. 



Gyclopecten (Delectopecten) vitreus (Gmelin) 1791 



Plate 18 



Pallium vitreum seu papyraceum Chemnitz \ex parte], 1784, p. 335, pi. 



67, figs. 637a-c. [Chemnitz' specific names rejected by Internat. 



Comm. Zool. Nom., Opinion 184, 1944.] Fig. 637a: "Norwegen, 



Island und Gronland findet." [Figs. 637b-c: "aus Drontheim" 



(Trondheim, Norway) == Pecten striatus Miiller, 1776, p. 248. 



"Island."] 

 Pallium vitreum Chemnitz. Schroter, 1788, p. 78. [Index of Chemnitz' 



names; rejected.] 

 Ostrea vitrea Gmelin, 1791, p. 3328. "Habitat in Oceano septentrio- 



nali." 

 Chlamys Papyracea Roding, 1798, p. 164. 

 Pecten vitreus Chemnitz. Bosc, 1824, p. 268. "Se trouve dans la mer du 



Nord." 

 Ostrea vitrea Chemnitz. Dillwyn, 1817, p. 263. 

 [non] Pecten vitreus Gray, 1824, p. 245. [= P. Greenlandicus Sower- 



by, 1842, p. 57, pi. 13, fig. 40. ". . . from Greenland."] 

 [?] Pecten vitreus Risso, 1826, p. 303, fig. 156. Mediterranean. 

 [non] Pecten vitreus King, 1831, p. 337. "Habitat in Freto Magel- 



lanico (passim)." [= P. nutans Philippi, 1845b, p. 57. "Patria: 



Fretum Magellanicum, Messier-Canal, Smith-Canal."] 

 Pecten vitreus (Pallium) Chemn. Philippi, 1844, p. 203, pi. 2, fig. 3. 

 Pecten Gem?nellari Filii Biondi, 1859, p. 118, pi. 1, fig. 4. 

 Pecten (Chlamys) vitreus Chem. H. & A. Adams, 1858, p. 553. 

 Pecten vitreus Chemnitz. Jeffreys, 1879 [ex parte], p. 561. "Greenland, 



Iceland, Scandinavia, Shetland, S. W. France, coast of Portugal, 



Mediterranean, N. E. America, van abyssorum "Challenger" Exp. 



(W. Patagonia) ; 20-600 fms." [P. abyssorum Loven in Sars, 1878, 



p. 22, pi. 2, figs. 6a-6c, a valid species; Challenger specimens all 



vitreus. ] 



