1913.] Clark, Echinoderms from Lower California. 225 



Plate IX, fig. 15). The globiferous pedicellariie have the basal part of the valves 

 about as long as wide, while the tubular blade is somewhat shorter; the opening of 

 the blade has a lower lip from which extend horizontally four, five or even six, very- 

 slender teeth, much longer than the diameter of the blade; the back or upper lip of 

 the opening has an angular margin but carries no teeth. The valves are about 

 .40 mm. long and the teeth below the opening of the blade are about .08 mm. 

 While these pedicellarise are no doubt of the same general structure as those of 

 Urechinus giganteus, they are not at all like them in detail, yet I know of no others 

 which they resemble more closely. 



Type.— Cat. No. , U. S. N. M., from Station 5689. 



Before examining the pedicellarise, I was inclined to consider this 

 unique specimen, a peculiar individual variant of lovcni, but the pedicel- 

 laria? are so characteristic, I have no doubt that rcticulatus is a good species. 

 The test is higher, firmer and apparently thicker than in loveni, but these 

 may be simply characters associated with the much shallower water in 

 which the specimen was taken. Possibly the shallower habitat is charac- 

 teristic of the species. 



Station 5689. Off Rosario Bay, west coast of Lower California, 879 fms. 



Schizaster townsendi. 



A. Agassiz, 1898. Bull. M. C. Z., Vol. 32, p. 82. 



The occurrence of this species off California extends its known range of 

 distribution far to the northward. The specimens range from 18 to 54 mm. 

 in length, the latter being somewhat larger than Agassiz's biggest specimen. 



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

 Bottom Temp., 39.9°. 



Station 5697. Off Monterey County, California, 485 fms. Bottom 

 Temp., 39.8°. 



Thirty-two specimens. 



Schizaster latifrons. 

 A. Agassiz, 1898. Bull. M. C. Z., Vol. 32, p. 81. 



This species, originally taken in the Gulf of California in 995 fms., 

 seems to have a more restricted range both geographically and bathyme- 

 trically than the preceding. Attention should be called to the fact that 

 the figures published in 1898 as representing this species really represent 

 the preceding species, townsendi (see A. Agassiz, 1904, Panamic Ech., p. 207). 

 The figures in "Panamic Echini" (Plate 102, figs. 1-4) give a good idea of 

 the species, although the specimen was a very small one. In the present 



