1913.] Clark, Echinodertns from Lower California. 209 



Station 5685. Southwest from Ballenas Bay, west coast of Lower 

 California, 645 fms. 



Station 5686. Off Ballenas Bay, west coast of Lower California, 930 

 fms. Bottom Temp., 37.3°. 



Station 5693. Northwest of San Nicolas Island, California, 451 fms. 



Station 5694. Southwest of Santa Cruz Island, California, 640 fms. 



Station 5695. Southwest of Santa Rosa Island, California, 534 fms. 

 Bottom Temp., 38.9°. 



Station 5699. Southwest from Monterey Bay, California, 659 fms. 

 Bottom Temp., 37.9°. 



Bathymetrical range, 451-930 fms. Temperature range, 38.9°-37.3°. 



Thirty-two specimens. 



Ophiura irrorata. 



Ophioglypha irrorta Lyman, 1878. Bull. M. C. Z., Vol. 5, p. 73. 

 Ophiura irrorata Meissner, 1901. Bronn's Thierreichs, Vol. 2, pt. 3, p. 925. 

 See also H. L. Clark, 1911. Bull. U. S. Nat, Mus., No. 75, p. 62. 



Three very large specimens add a new locality to the range of this almost 

 cosmopolitan species. The largest one (disk-diameter, 38 mm.) is consider- 

 ably larger than any that has hitherto been recorded. 



Station 5684. Southwest from Magdalena Bay, east coast of Lower 

 California, 1760 fms. 



Ophiura leptoctenia. 

 H. L. Clark, 1911. Bull. U. S. Nat. Mus., no. 75, p. 51. 



The finding of this species off central and southern California extends 

 its known range far southward. None of the specimens are noteworthy. 



Station 5694. Southwest of Santa Cruz Island, California, 640 fms. 



Station 5695. Southwest of Santa Rosa Island, California, 534 fms. 

 Bottom Temp., 38.9°. 



Station 5699. Southwest from Monterey Bay, California, 659 fms. 

 Bottom Temp., 37.9°. 



Twenty -eight specimens. 



Ophiura ponderosa. 



Ophioglypha ponderosa Lyman, 1878. Bull. M. C. Z., Vol. 5. p. 93. 



Ophiura ponderosa Meissner, 1901. Bronn's Thierreichs, Vol. 2, pt. 3, p. 925. 



A single small specimen is the only representative of this species. 

 Station 5694. Southwest of Santa Cruz Island, California, 640 fms. 



