260 HAWAIIAN AND OTHER PACIFIC ECHINI. 



especially at the posterior end of test. These ophicephalous pedicellariae are 

 not peculiar in form but are remarkably small, the valves measuring only .10- 

 .12 mm. plus .04-.06 for the loop. The triphyllous are not much smaller for 

 their valves measure .10 mm. long by .07 mm. wide. The multidentate have 4, 

 or more commonly 5, valves (PI. 146, fig. 32) which are curved inward near tip 

 and are remarkably flat; each valve (PI. 146, fig. 33) is .80-.85 mm. long-and 

 about .20 mm. in width. These valves are quite different from the multiden- 

 tate valves in Lovenia. Rostrate pedicellariae in Pseudolovenia are fairly 

 common but not very distinctive. The valves are about .40-.50 mm. long, 

 rather heavy, with the base about as wide as high, and the blade twice as wide 

 near tip as at base, where it is about one fourth the blade-length. Tridentate 

 pedicellariae occur in two forms but neither seems at all common. The slender 

 tridentate have valves about a millimeter long with the strongly compressed 

 blade .12-15 mm. wide and nearly that in depth. The stout tridentate have 

 wider, flatter valves, .45-65 mm. long, approaching those of the multidentate in 

 form. 



There can be little danger of confusing the bare test of this species with 

 that of any Lovenia, but with the spines on, specimens would easily pass for 

 examples of that genus. Young specimens are not at all flat, like young Lovenias, 

 but on the contrary are quite high with a tendency to have interambulacrum 

 5 carinate dorsally. Thus a young Pseudolovenia 24 mm. long is about 12 mm. 

 high while a young Lovenia cordiformis of the same length is only about 9.5 mm. 

 high. The decidedly anterior position of the apical system in Pseudolovenia 

 is also a marked difference between the two genera, for in Lovenia it is but little 

 anterior to the middle (compare PI. 160, fig. 10 with PI. 161, figs. 1, 8, 11). 



The specimens from Japanese waters are small (about 24 mm. in length), 

 but show all the characteristic features of the genus and seem to be so similar to 

 specimens of the same size from Hawaii, that I can find no distinguishing marks. 

 It is true that the labrum while very slender posteriorly does not reach the third 

 ambulacrat plates, but as specimens from Hawaii show a similar condition of 

 the labrum, this feature is not at all significant. Possibly adult specimens from 

 Japan may show some distinctive specific characters but I find none in these 

 two small specimens. 



Station 3836. Off Lae-o Ka Laau Light, Molokai, Hawaiian Islands. 

 Bott. temp. 48°. 238-255 fins. Br. gy. m., s. 



Station 3839. Off Lae-o Ka Laau Light, Molokai, H. I. Bott. temp. 

 46.3°. 259-266 fms. Lt. br. m., s. 





