70 THK AMKKICAN MONTHLY [Mmvli, 



shouKl liavc such a tiistinotivc title. Now, tlioso tlircc rensons 

 applv with ahiiost if" not tjiiitc ccjnal force to tlic Railiolaria. It is 

 just as true ot' tlic Kadiohiria as of tlic Diatoniacca* tliat,^to quote 

 his wortls. they '* can become the basis of one of the most im- 

 pressive, instructive, anil en<;ajjinj; branches of pure science that 

 mav occupy the attention of the human mind. 



'• Firstly, on account of its power in fjratifvin<; tlie |Mn ely natural 

 impulse inherent in the mind to be impressed \\ ith whatever is 

 beautiful in nature. 



"Secondly, from its bein«^ a legitimate line of researcli inde- 

 penilenl of the merely beautiful, jiractical. or pecuniary. 



"Thirilly. the stutly .... tVom merely an observational point of 

 view, whether in relation to their place in nature, what role their 

 creation was intended to fdl in the economy of nature or of earth- 

 building, and their biological functions is capable of draw- 

 ing forth the highest and best eflbrts of mental genius, erudition, 

 and the power of the judicial and critical qualities in bright 

 minds, in dealing with the numerous problems suggested by 

 repeated and lengthy association with their investigation. A field 

 of human elVort is here otVered well worthv of capable minds."* 

 And a field, mind you, wiiich on this side of the water has not, 

 to my knowledge, lieen worked at all. If Leidy did not think it 

 beneath him to devote himself to the fresh-water rhizopods, 

 why should any one scorn their marine relations.'' If he were to 

 confine himself to the Barbadoes tleposits alone he would then 

 have more genera to consider than Leidy described — considerably 

 more, for the genera of the fresh-water rhizopods as given by 

 Leidy only number 30. but the genera of the Radiolaria of Bar- 

 badoes as described by Ehrenberg number 42, or as classified 

 by Haeckel, 56, nearly twice as many. I have already mentioned 

 the fact that Ehrenberg found 2S2 species in that earth, that 

 Mrs. Bury added 141 more, and that Haeckel says the list is not 

 ended yet, but that the total number of species in that deposit 

 alone is probaldy over 5CX). Are not they enough to begin on, 

 especially as there is a chance of discovering nearly So new 

 species.' And here let me say. for the encouragement of others, 

 that I have already found a large numl)er of those given by 

 Ehrenberg. and quite a number that are not figured bv him. I 

 worked at that material all summer and picked out and mounted 

 on type-plates nearly 500 forms. Many of these proved to be 

 duplicates, and quite a number, as I have said, were not in Ehren- 

 berg ; but here is the list of those I was able to identify. 



Cenosphaera micropora. Spongosphsura pachystyla. 

 Stjlospha*ra liostylus. rhabdostjla. 



sulcata. Haliomma .sol. 



Ia;vi8. nobile. 



coronata. apertum. 



flexuoba. contiguum. 



spinulosa.' umbonatum. 



• Aincr. Mo. Mic. Jour., Nov. 1892, pp. 249-350. 



