222 Bulletin American Museum of Natural History. [Vol. XXXII, 



Station 5687. Off Pt. Santa Eugenia, west coast of Lower California, 

 480 fms. Bottom Temp., 41.1°. 



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



Station 5696. Off San Luis Obispo County, California, 440 fms. 

 Bottom Temp., 39.9°. 



Three specimens. 



Strongylocentrotus franciscanus. 



Toxocidaris franciscana A. Agassiz, 1863. Bull. M. C. Z., Vol. 1, p. 22. 

 Strongylocentrotus franciscanus A. Agassiz, 1872. Rev. Ech., Pt. 1, p. 163. 



There are two specimens in the collection, about 75-85 mm. h. d. Both 

 are obviously young but the failure to find more than eight pairs of pores 

 in an arc has surprised me, for nine is the number characteristic of the 

 species and ought to be found in many arcs of specimens as old as these. 

 The spines are unmistakable however. Both specimens are from Cedros 

 Island, west coast of Lower California, which is probably the southern limit 

 of the species. 



Strongylocentrotus purpuratus. 



Echinus purpuratus Stimpson, 1857. Jour. Bost. Soc. Nat. Hist., Vol. 6, p. 86. 

 Strongylocentrotus purpuratus A. Agassiz, 1872. Rev. Ech., Pt. 1, p. 165. 



As in the case of the preceding species, Cedros Island, west coast of 

 Lower California, must be the southern limit of this form. A single speci- 

 men from that Island, about 50 mm. h. d., is the sole representative of 

 ■purpuratus in the collection. 



Echinometra vanbrunti. 

 A. Agassiz, 1863. Bull. M. C. Z., Vol. 1, p. 21. 



There are four, fine adult specimens, about 70 mm. longer h. d., from 

 Santa Maria Bay, west coast of Lower California. How much further 

 north it ranges has yet to be determined. 



Encope grandis. 



L. Agassiz, 1841. Mon. Scut., p. 75. 



There is a fine series of adults of this extraordinary clypeastroid. They 

 are mostly about 100 mm. across, the length usually not quite so much. 



