52 HAWAIIAN AND OTHER PACIFIC ECHINI 



Height of test rather more than .25 of length; periproct very large, longitudinally 

 elongated; anal plates without spines; petals very broad, short, pointed . . . Orudis. 

 G nital pores in interambulacra at a greater or Less distance from rnadreporite peronii. 



Peronella strigata, 1 comb. nov. 



Laganum strigatum A. Agassiz and Clark, 1907. Bull. M. C Z., 60, p. _ 



Plate 142, figs. 11-13. 



Length, 30 mm.; breadth, 29 mm.; height, 6 mm.; margins about 1.8 mm. 

 thick; petaloid area, 12 mm. long; petals about equal, 1.7 mm. wide, open by 

 nearly a millimeter, as poriferous areas (12-14 pore-pairs on each side) are 

 nearly parallel. Mouth central. Periproct, 2.5 mm. long by 2 nun. wide, situ- 

 ated 3 mm. from margin, covered with plates which do not carry spines. Genital 

 pores four the posterior interambulacrum having none. Tuberculation of test 

 moderate, including many glassy tubercles of about the same size and abundance 

 as the primary tubercles. Sutures between plates sharp and well defined. 

 Miliary spines with the component rods gradually widened and rather finely 

 serrate at tip. Pedicellariae not peculiar or distinctive in any way; no triphyl- 

 lous were found and tridentate and ophicephalous are not common. Color 

 light brown with the sutures darker and more or less purple. 



The holotype and only specimen is from Albatross 



Station 3859. Off Mokuhooniki Islet, Pailolo Channel, Hawaiian Islands. 

 Bott. temp. 60.5°-60.2°. 138-140 fms. Fne. s., m. 



In the original description of this species, specimens of Laganum fudsiyama 

 were included and are referred to as having five pores. The species are undoubt- 

 edly nearly allied but aside from the difference in number of genital pores 

 and in color, there is a difference in the form of the periproct. which is not 

 elongated in fudsiyama. 



Peronella orbicularis. 



Echinodiscus orbicularis Leake, I77v Add. ad. Klein, p. 144. 

 Peronella orbicularis A. Agassis, 1872. Rev. Ech. pt. 1. p. 149. 



Specimens of this species arc in the M. C. Z. collection from the Persian 

 Gulf, Philippine Islands, and Torres Strait. My observations aceord with 

 de Meijere's, except that I failed to fugd the tridentate pedicellariae which he 

 figures. 



1 Strigatus = furrowed, in reference to the very distincl sutures between the plat 



