NATURAL SCIENCES OP PHILADELPHIA. 273 



ral lobes more depressed, and about one-third or one-fourth wider than th 

 mesial lobe, rounding down rather abruptly to the lateral margins ; segments 

 nine or ten, rounded, simple and separated by distinct farrows ; all terminat- 

 ing abruptly at the inner edge of the broad, smooth, marginal zone. 



Entire surface apparently very nearly smooth. 



Length of cephalic shield, exclusive of spiniferous appendages, 0"45 inch ; 

 breadth of same, - 6b'inch ; height of do. 0-31 inch. Length of glabella, ex- 

 clusive of neck segment and anterior border, 0-36 inch ; breadth of same, 

 across the posterior lateral lobes, 0-29 inch ; do. of same across the constricted 

 central region, 25 inch; do. of same anteriorly, - 2S inch. Length of eyes, 

 - 18 inch ; height of same behind, to top of palpebral lobes, O0S inch. 

 Length of pygidium, - 50 inch; breadth of same, - 55 inch. 



This species seems to combine the characters of Phillipsia and Griffithides, 

 as usually understood, to such an extent as to apparently warrant Prof. Ko- 

 ninck's opinion that these two types can scarcely be regarded as constituting 

 entirely distinct genera. In its somewhat swollen glabella and smooth eyes, 

 it agrees with the characters assigned Griffithides, while in almost all its other 

 characters, it corresponds to Portloek's definition of his genus Phillipsia. We 

 know of no species with which it is liable to be confounded. 



Locality and position. Springfield, Illinois. Upper Coal Measures. 



Note. In our paper published in the Proceedings of the Academy for Aug., 

 1865, p. 154, we proposed the name Sphcerocrinus for a section of the genus 

 Actinocrinus, of which our A. concavus is the type. Since that time, we ob- 

 serve Roemer had previously used the name Spharocrinus for another group : 

 hence we now propose for our type the name Ccelocrinns. 



December 12th. 



The President, Dr. Bridges, in the Chair. 



Twenty -one members present. 

 The following paper was offered for publication : 

 " Second Contribution to the History of the Delphiuidce." By 

 Prof. E. D. Cope. 



Prof. E. D. Cope exhibited the skeleton of a seal which was shot near Cam- 

 bridge, Maryland, on an arm of Chesapeake Bay, eighteen miles from salt water, 

 by Mr. Daniel M. Henry. It was a species of Cystopbora, or hooded seal, 

 measured 6f feet, and weighed, when living, about 330 lbs. The skin was not 

 preserved, but the fur of the extremities was straw-colored. The nails very 

 strong and extended much beyond the palmar integument in its dried state. 



Whether this species is the C. eristata or antillarnm can not be 

 determined, owing to the imperfection of extant descriptions. The eristata 

 has been taken as far south as New York. 



DeKay, in his Zoology, mentions a seal recorded by Mi'chill as having been 

 taken high up the Chesapeake, near Elktou. It was probably the same as the 

 present. 



Prof. E. D. Cope also exhibited some specimens of crania of Cetaceans of onr 

 coast, and stated that the only species which could as yet be proven to belong 

 to our fauna were the following : 



Balsena 'cisartica, or Southern Riht Whale. 



Megaptera osphyia, The Humpbacked Whale. 



Orca, sp., The Killer. 



Globicephalus intermedins, or melas, The Black Fish. 



Beluga canadensis, The AVhite Whale. 



1865.] 



