194 APPENDIX. 



Its head shows a broad surface for attachment of the round ligament. 

 The shaft was hollow, and provided with strong rugosities for muscular 

 attachment. The distal end was expanded, and the articular surfaces for 

 the tibia and fibula were much as in Sesperornis. 



The tibia in this specimen of Baptornis (number 1467) was a strong 

 bone with the shaft subtrihedral proximally, becoming nearly cylindrical 

 toward the middle, and flattened from before backward toward the distal 

 end. The suture between the tibia and the coossified tarsal bone is still 

 distinct, but most of the articular face is broken away. The fibular ridge 

 is strongly developed, and was interrupted by the groove for the main 

 tibial artery, as in Sesperornis. The ridge on the opposite, or inner, side 

 of the tibia is more strongly developed than in Sesperornis. It also con 

 tinues further downward, and remains sharp and distinct to near its 

 termination. 



Measurements of Baptornis advenus. (Xo. 1467.) 



Right. 



Least transverse diameter of shaft of femur, 9. nim 



Antero-posterior diameter, 8. 



Greatest diameter of distal end, 21.5 



Transverse diameter of tibial articulation, 14. 



Transverse diameter of fibular articulation, 6. 



Length of tibia (approximate), 125. 



Transverse diameter below fibular ridge, 9. 



Antero-posterior diameter below fibular ridge, 7. 



These specimens indicate a bird about as large as a Loon, and one 

 apparently of similar aquatic habits. The locality of the only remains at 

 present known is in Western Kansas, in the same Cretaceous beds that 

 contain the Odontornithes and Pteranodontia. 



Both of the above specimens are preserved in the Yale Museum. 



G-RACULAVUS, 3 Marsh, 1872. 

 Graculavus yelox, Marsh. 



Marsh, American Journal Science, Vol. Ill, p. 363, May, 1872 ; VoL V, p. 229, March, 



1873. 

 Coues, Key to North American Birds, p. 349, 1872. 



The specimens representing this species at present were found by 

 Mr. John Gr. Meirs, near Hornerstown, New Jersey, in the green-sand of 

 the middle marl bed, or upper Cretaceous. 



The known remains (number 855) of this species belonged to a bird 

 about two-thirds as large as a Cormorant They are all in the Yale 

 College Museum. 



8 G-raculus, a cormorant, and avus, a grandfather. 



