226 HAWAIIAN AND OTHER PACIFIC ECHINI. 



Eupatagus. 



Agassiz and Desor, 1847. Ann. Sci. Nat. Zool., (3), 8, p. 9. 

 Type, Eupatagus valenciennesii Agassiz and Desor, 1847, loc. cit. 



So far as Recent species are concerned this genus contains only the type, 

 but Fossil species in some numbers have been assigned to it. Examination 

 of the only specimen in the M. C. Z. collection which still has its natural cover- 

 ing of spines, revealed after prolonged search, only a single pedicellariae, a 

 tridentate with valves about .42 mm. long, and with a few coarse teeth on each 

 side. The geographical range of E. valenciennesii is limited, so far as we know 

 to the region about Bass Strait, Australia, and it is far from common there, 

 for no specimens occurred in the Endeavour collection or in any of several other 

 collections from southeastern and southern Australia which I have examined 

 in the past four years. 



Gymnopatagus. 



Doderlein, 1901. Zool. Anz., 24, p. 22. 

 Type, Gymnopatagus valdiviae Doderlein, 1901, op. cit., p. 23. 



It is rather remarkable that in the nearly seventy years since Eupatagus 

 was named no second species has been found, while within fifteen years of the 

 first recognition of this closely allied genus, four additional species have been 

 collected, and all the five species appear to be well defined. The genus is cer- 

 tainly very close to Eupatagus on the one hand and to Elipneustes on the other 

 but it may be just as well to keep them separate, although the cordate form of 

 the anterior end of the test which led Doderlein to establish this genus is not 

 characteristic of most of the species. 



Koehler (1914. Ech. Indian Mus. Spat., p. 98-105) has described a Gymno- 

 patagus sewelli, which he thinks is very near magnus A. Agassiz and Clark but 

 he does not consider the description adequate to enable him to decide whether 

 the two are identical. On comparing his figures with our description, I find 

 so much agreement that the identity of his species and ours seems highly proba- 

 ble and when our specimens are compared with his elaborate description and 

 excellent figures, there can be no doubt left that we are dealing with the same 

 species. It may be added that this species is the only one in which ophicepha- 

 lous pedicellariae have not been found and is also the only one in which a globi- 

 ferous pedicellaria has been seen. Rostrate and tridentate pedicellariae occur 

 in all the species and occasionally furnish good specific character.-. 



