l6 JOURNAL OF THE [April, 



silky covering is not a cocoon spun by the occupant, but is 

 borrowed for the purpose of disguise, and the little " varmint " 

 is a veritable wolf in sheep's clothing. As this covering is com- 

 posed of all sorts of odds and ends, it lends color to this fiction — 

 if fiction it be. 



The specimen under the inch objective, has been bleached in 

 potash, and is mounted in balsam. That under the two inch is 

 as found, except that its covering has been disturbed so as to 

 show the mandibles in a position of rest. 



NOTE ON THE FORAMINIFERAL FAUNA OF THE 



MIOCENE BED AT PETERSBURG, VIRGINIA ; 



WITH LIST OF SPECIES FOUND. 



BY ANTHONY WOODWARD, 

 i^Read May tth, 1887.) 



The evidence of the very remarkable abundance of Foramin- 

 ifera in the Miocene bed at Petersburg, Virginia, was found by 

 me accidentally while examining some coarse material from be- 

 tween two valves of Pectunculus lentiformis, Conrad, containing 

 by weight Y^ oz. of sand and fragments of shells. 



This specimen, formerly the property of Mr. C. M. Wheatly, 

 an old collector, has lain undisturbed in the private collection 

 of Mr, Sanderson Smith for over thirty-five years. 



By a hasty glance with a hand lens, I saw that the material 

 was very rich in foraminifera. On a second and more careful 

 examination, with the aid of the microscope, I identified the fol- 

 lowing genera and number of species : 



Spiroloculina, 2 j Milwli)ia, i / Lagena, i ; Cristellaria, i ; 

 Discorbina, 2 j Anomalina, 2 ; Pulvinulina, i ; Nonionina^ 3 y 

 Polystomella, i j Amphistegina, i. 



The last named genus was found in such numbers that it 

 almost equals the great Amphistegina beds at Nussdorf, near 

 Vienna, Austria, It is also found in Maryland, South Carolina 

 and Alabama. 



List of species and the number of each found : 



Spiroloculina planulata, Lamarck, sp., i, 



Spiroloculina limbata, d'Orbigny, 2. 



