GO HAWAIIAN AND OTHER PACIFIC ECHINI. 



Salenocidaris profundi A. Ag. and CI. 



Salenia profundi Duncan, 1877. Ann. Mag. Nat. Hist. (4), XX, p. 70. 

 Salenia hastigera A. Agassiz, 1879. Proc. Am. Acad., XIV, p. 198; 1881, Challenger Echini, 



p. 51, PI. 4, figs. 3-n. 



Plate 45, figs. lQ-21. 



This species was not taken by the " Albatross," but is included so as to 

 give an account of the pedicellariae. 



The distribution of the pedicellariae is much as in the other species 

 of the genus, but the globo-^e are very abundant, particularly on the 

 abactinal system. The quadridentate and tridentate are infrequent or rare, 

 and almost wholly on the actinal side. Their valves (figs. J6, 11) are long, 

 narrow, and nearly straight, and thus quite different from those of varispina. 

 The ovoid pedicellariae (fig. 18) are not peculiar, but the globose are 

 commonly distinguishable from those of varisjnna by the valves (fig. 19) 

 being nearly as wide as they are long. 



Salenocidaris miliaris A. Ag. and CI. 



Salenia miliaris A. Agassiz, 1898. Bull. M. C. Z., XXXII, p. 74. 

 Plates 43, figs. 5, 6 ; 45, figs. 1-8. 



The quadridentate pedicellariae (PI. 45, fig. 1) are rather infrequent, and 

 occur only actinally and usually on the interambulacra. The stalk is 

 shorter than the valves (PI. 45, fig 2), which are from .75-.95 mm. long. 



The tridentate pedicellariae (PI. 45, fig. 3) occur also on the interam- 

 bulacra, but only near the ambitus, and are not very common. The stalk is 

 about equal to the valves, which are .60-80 mm. in length. 



The ovoid pedicellariae (PI. 45, fig. 4) are quite infrequent, and are 

 found chiefly on the interambulacra. The stalk nearly equals the head 

 in thickness, and is five or six times as long ; the valves (PI. 45, fig. 5) meas- 

 ure about .20-.25 mm. in length. 



The globose pedicellariae (PI. 45, fig. 6) are very abundant all over the 

 abactinal system and on the ambulacra ; they are less common on the 

 interambulacra; on the actinostomal membrane there are five small, radial 

 clusters of them. The valves (PI. 45, fig. 7) nearly equal the stalk in 

 length, measuring .12-30 mm. 



