NUMBER II. 



Art. XII. — Observations on the Variiition of the Mas^uetio 

 Declination in connection with the Aurora of October 

 14th, 1870, etc. ; bv Alfred M. Mxykk, 



vJxI-~^'''*^' ''" ^^^'^"^^'^ ^'*^^'^^- *^"-^t Part; by T. S. TI, nV, 



Al\ .—On Siredon Metamorphoses, etc.; by K.'T). C\)i>k,. 



y^y.—Lo\Vi}r Carboniferous Limestone in Ohio; hy K. \l 



^ VI.— Brief Contributions to Zoolop^y from the Museum ot 

 Yale College. No XI. Descriptions of some imperfecta 

 known Ascidians from XewEnirland; bv A. E Vkrijii r 



XVII.— Iiisectsinhabiting Salt Water; l)yA.''s. Packxuu, Jr." 



^^ ni.— On the existence of the Xummulitic formation iii 

 C:hina ; by Baron vox RirHxiiOFEN, 



XIX.— Note on the Infusoria Flatrdliita and the SixMioj-i' 

 Ciliatse; by H. Jamks-Clark, _ 



XX. -Memoir of Thomas (Jraham; l.\ .I.>.i \,, P. (,.,,.. i ,. . 

 the Gasteropoda; bv \V.' II.' L)'\ LI, * '" '''■'•'"'""- 



^^11.— Note to Article' T, on the (^iateniar\ of thJ Xeu 

 Haven Region ; by J. D. Daxa, 



XXIII.— Auroral Belt of October 24th-25th, 1870, 



scifcntifk; rNTJ!;LLrr4EXCE. 



^^ie'«duW -'^ ^^y«'C5-0ii the Olilorides of Sulphur, H^evfr uri.l OrFRot 



-FroinB \ Gould, dat.d ( o,.Ua, 1 



