114 HAWAIIAN AND OTHER PACIFIC ECHINI. 



Echinolampas ovata. 



Echinanthus ovatus Leske, 1778. Add. ad Klein, p. 127. 



Echinus oviformis Gmelin, 1788. Linn6, Syst. Nat., ed. 13, 1, pt. 6, p. 3187. 



Echinolampas ovata Doderlein, 1906. Valdivia Ech., p. 240. 



Plate 153, figs. 1, 2. 



Owing to the confusion that has existed in the identification of the different 

 forms of Echinolampas, the exact geographical distribution of this species is 

 not known. India and Ceylon are the only places from which I have seen 

 specimens but there is no reason to doubt the records from the Red Sea and 

 from Molucca. The pedicellariae are few and insignificant. The ophicephalous 

 are like those of alexandri while the triphyllous do not differ essentially from 

 those of sternopetala. The tridentate seem to be of only one form, that with 

 narrow, straight valves, figured under alexandri (PL 144, fig. 16). 



Echinolampas richardi. 



Desmoulins, 1837. Tab. Syn., p. 340. 



Plate 153, figs. 9, 10. 



This species is known only from 'the West Coast of Africa and I have seen 

 only a bare test. Much more material is necessary before the validity of the 

 species can be considered established. 



Echinolampas alexandri. 



De Loriol, 1876. Mem. Soc. Phys. Hist. Nat. Geneve, 24, p. 660. 



Plates 144, figs. U-16; 153, figs. 8, 4- 



This species is known from both Ceylon and Mauritius but not nearly 

 enough material is available to settle the question of its validity. It is very 

 doubtful whether it is really distinct from ovata. I found no triphyllous pedicel- 

 lariae in the specimens examined but ophicephalous were not rare; the valves 

 (PL 144, fig. 15) are about .20 mm. long besides the loop, which is .03-08 mm. 

 additional; the blade is quite rounded. Tridentate pedicellariae were found 

 of two kinds which do not seem to intergrade. The valves in one PL 111. fig. 

 are somewhat curved and are flattened and widened at the tip for the portion 

 which is in contact with its fellows; there are coarse teeth at the apex ami a 



