ELASMOBRANCHII. 



2 



25 



Fig. 1. — Heptranchias primigcnius (Agassiz). ' 1-2, Allowaystown (Yar- 

 row) ; 3-7, Charles Co., Md. (Thomas). 



All of my examples agree largely with Agassiz's figures 16 

 and 17 1 . Eastman considers H. plectrodon Cope identical 2 . 



Formation and locality. This species was originally found 

 in the State in Cumberland County, in Miocene beds. Known 

 only from detached teeth. My examples are 4 teeth from Mon- 

 mouth County (W. Cleburne) without formation, though pos- 

 sibly Eocene; 2 teeth from the Miocene [Eocene? K], of Shark 

 River in Monmouth County (T. A. Conrad) ; and 3 teeth from 

 Allowaystown, Salem County (H. C. Yarrow), without for- 

 mation. 



Genus XIPHODOLAMIA Leidy. 



Xiplwdolamia Leidy, Journ. Acad. Nat. Sci. Phila., (2) VIII, 1877, p. 252. 



Type Xiphodolamia ensis Leidy, monotypic. 

 Xiphodontolamia Leidy, 1. c, nom. orig. 



^oiss. Foss., Ill, 1843, p. 218, PI. 27, figs. 6-8, 13-17, (4-5 doubfful). 

 : Md. Geol. Surv. Miocene, 1904, p. 78. 



