80 THE AMERICAN MONTHLY [Mar., 



Stauroneis aspera, Kg. Hyalodiscus radiatus, E. 



Raphoneis genimifera, E. Rhizosoleuia styliformis, Bright. 



" atnphiceros, E. Triceratium favus, E. 



The above list does not include the whole number of 

 species found in this deposit, possil)ly not more than half 

 of them; but enough are given to show the general char- 

 acter of the deposit. I have not mentioned quite a num- 

 ber of the larger forms because I felt uncertain as to their 

 proi)er determination ; and multitudes of the minute 

 kinds are omitted for the same reason. The Connecticut 

 shore material is remarkable for the large amount of 

 very minute forms it contains. I had hoped to investi- 

 gate the deposit thrown up by the pressure of the R. R., 

 embankment crossing Leete's Creek, from top to bottom 

 during the dry weather but did not make it out. We se- 

 lected a place where the earth had been thrown up and 

 cracked open exposing a stratum about seven feet below 

 the original surface, here we dug down five feet and pro- 

 cured earth from at least twelve feet below the top. 

 Slides made from this material show beautiful specimens 

 of fiiirirellii fehigerii, Tro/r/doneis seriata in great abun- 

 <lance, Plenrofiiguia baliictim, large Cose 'mod i Hens, large 

 8y7iedra, Acflrioptichus unduJafns, l^colioplpura and Naoi- 

 rnla all abundant ; and small kinds down to very minute 

 in about equal proportion, i sent a slide containing the 

 medium density to Dr. D. B. Ward. He reports: " In the 

 12 foot deposit slide I found Navicnia uspera, didyma, 

 marnia, /isclipri , eHiptird, f^Iliptua var., ohloi)g<dJa, perf- 

 f/rina, digitorddiato, yorrt^asis, fyra, 'nit(^rrupta, siiiithii, 

 fnrtti.oi>a ; tStdxroncIs saJina ; Anip]ior<t proteus ; Plen- 

 rosigma affine (iud halt/'c/dn ; IVopidoneis seriata ; HJuih- 

 donenia adriaticuni ; J^coltopl&ttra tninida ; Acti/ioptychfts 

 II ndiilat iisi ; Nitz.-^chid ma rgi it iilnta, s/i/iiki vtir.; 'Siirindhi 

 ff^higerii ; and a small var. o\' fast ti o.so ; Panilia siUcata ; 

 Ooscrnodiscus ocitlis iridis, rudiatns, e.fcefitricus, aph:- 

 ulatus (f); Synedra fulgeiis ; Biddiilphia aiirita and 

 rhoiiihus.^' 



