HOLDEN. — CRETACEOUS PITYOXYLA. 623 



Penhallow, D. P. 



(14) Manual of North American Gymnosperms, Boston, 1907. 

 Conwentz, H. 



(15) Untcrsuchungen u. foss. Hoelz. Schwedens, Konig. Svenska 



V<>r. Ak. Hand). Bd. 24, no. 13, 1892. 

 Jeffrey, E. C. 



(16) A New Prepinus from Martha's Vineyard, Proc. Boston 



Soc. Nat. Hist. vol. 34, no. 10, p. 333-338, pi. 32. 

 Seward, A. C. 



(17) Fossil Plants of the Wealden, pt. 2. British Museum Cata- 



logs. 

 Hollick, A. 



(18) Cretaceous Marls of Cliffwood, New Jersey. 

 Gothan, W. 



(19) Die fossile Hoelzreste von Spitzbergen. Kongl. Svenska 



Vet. Ak. Handl. Bd. 45, no. 8. 



