1913.] Clark, Echinoderms from Lower California. 215 



Amphiura serpentina. 



Lutken and Mortensen, 1899. Mem. M. C. Z., Vol. 23, p. 143. 



Although the specimens are not in very good condition, I do not think the 

 identification is in doubt. They seem to be intermediate between the 

 typical form and the var. a of Lutken and Mortensen. 



Station 5GS3. Off Cape St. Lucas, Lower California, 630 fms. Bottom 

 Temp., 39.1. 



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

 California, 645 fms. 



Station 5698. Off Monterey County, California, 475 fms. Bottom 

 Temp., 39.9. 



Six specimens. 



Amphiodia dalea. 



Amphiura dalea LYMAN, 1879. Bull. M. C. Z., Vol. 6, p. 27. 



These specimens, of which the largest is 15 mm. across the disk, agree 

 almost exactly with those discussed by Lutken and Mortensen (1899, Mem. 

 M. C. Z., Vol. 23, p. 154), and on comparison with cotypes from the southern 

 Atlantic I find no reason to criticize their identification. Verrill (1899, 

 Trans. Conn. Acad., Vol. 10, p. 315) places the species in Amphioplus, no 

 doubt because of Lyman's figure, but as Lutken and Mortensen point out 

 that figure is misleading. There are really only three oral papillae on each 

 side. 



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

 California, 1760 fms. 



Station 5692. Off Pt. San Tomas, west coast of Lower California, 

 1076 fms. Bottom Temp., 37.1. 



Three specimens. 



Ophionsreis annulata. 



Ophiokpis annulata LECONTE, 1851. Proc. Acad. Nat. Sci. Phila., Vol. 5, p. 317. 

 Ophionereis annulata LYMAN, 1860. Proc. Boston Soc. Nat. Hist., Vol. 7, p. 203. 



There is a good series of this well known species, the smallest 5 mm., 

 the largest 18 mm., across the disk. 



Northern end, east side, Cedros Island, west coast of Lower California. 



