334 MESSRS. T. E. JONES AND E. CHAPMAN 



when they had attained a selection value, they would be rapidly 

 increased by the principle of utility. 



This is exactly the opposite of the conclusion arrived at by 

 Dr. Wallace, except that it applies only to a certain number of 

 characters, wbile Dr. Wallace would make his conclusions apply 

 to " every truly specific character." If he would change " every " 

 into " many a," I should no longer object to it. The discovery 

 of the principle of Natural Selection by Mr. Darwin and 

 Dr. Wallace marked a great advance in Biology ; but it cannot 

 be regarded as final. There is yet much to be learnt ; and it 

 seems to me far more probable that there are undiscovered causes 

 at work, than that all the apparently useless characters which 

 I have mentioned are due to the principle of utility. Just as 

 gravitation does not express the whole of the relations between 

 inorganic bodies, so, probably, selection does not express the 

 whole of the relations between organic bodies. 



On the Fistulose Polymorphirus, and on the Genus Ramulina. 

 By T. EuPEKT Jo]yES, E.E.S., F.Gr.S., and E. Chapmaij, 

 A.L.S., F.E.M.S. 



Part II *. — The Genus Eamulina. 



[Bead 3rd June, 1897.] 



CoifTENTS. 



Page 

 § 1. General Eemarks on the genus Bamulina, Rupert Jones, 1875 ... 334 



§2. Generic Characters of i?amtt/OTa 337 



§ 3. Species of Bamulina 339-353 



1. 5. tern's, Jones. Figs. 1-4 339 



2. R. globulifera,'Br&d.j. Figs. 5-22 340 



3. B. acukata, Wright. Figs. 23-42 345 



4. B. Grimaldii, Schlumherger. Figs. 43, 44 350 



5. B. cervicornis, Chapman. Figs. 45-51 351 



§4. Occurrence of Bamulina 353 



§ 5. Distribiiti on and Eange in Time of Bamulina 353 



§1. General Hemarks on the Genus Eamulma. 

 This genus was instituted in 1875 t on the peculiar characters 

 of some small tubular fossils having enlargements at the junction 



* For Part I. see the Linnean Society's Journal, Zoology, vol. xsv. (1896) 

 pp. 496-516. 



t Proc. Belfast Naturalists' Field Club, toI. i. 1870-86, Appendix III.1875, 

 p. 88, pi. iii. figs. 19, 20. 



