.893.] 125 
[Woodvvorth. 
term series given up to general use, ll'J; term branch supplanted by tribe 
equal to subfamily, 119-120; term f;»mily, 120; suborders wrongly defined 
by Blake, 120; signiticance of these groups, 120; branch used for suborder, 121 ; 
term limb proposed for order, 121; the limbs of the Cephalopoda spring from 
the Ortiioceratidae, 121; this family is therefore the trunk of the class, 121; 
the Endoceratidae the roots of the Cephalopoda or radital forms. 121-122; 
preliminary description of the Endosiphouoidea, 122; term radical, 122: other 
radical forms, 122. 
Mr, W, F. Giuiong spoke oil llie topograpliy of plants. 
General Meeting, April 19, 1893. 
President W. H. Niles in the chair. Sixty-two persons 
present. 
It was aTinounced that the Conncil liad elected Jolin M. 
Coulter, Daniel C. Eaton, Angelo Heilprin, George H. Horn, 
Joseph Leconte, J. Peter Lesley, Henry F. Osborn, Richard 
Rathbun, Robert Ridgway, William Trelease, and Edmund B. 
Wilson Corresponding Members, and Albert Perry lirigliani a 
Corporate Member of the Societ3\ 
Prof. H. W. Haynes, for the Committee on the nomination of 
officers for 1893-94, presented a report. 
Mr. C. P. Bowditch, spoke of the ruins of Central Amciica, 
describhig various architectural structures, modes of burial, plans 
of plazas, njonoliths, etc. 
The following paper was read : — 
ON TRACES OF A FAUXA IN THE CAxAIBRIDGE 
SLATES. 
liY .T. B. WOOD WORTH. 
[Abstract. 2 
In 1869, Professor Shaler gave the name Cambridge slates to 
the argillaceous and arenaceous rocks in the valleys of the Mystic 
and Charles Rivers, and announced the occurrence of obscure 
fossils or fucoids in this formation, but of these fossils no 
descriptions or figures were given. 
