IV TABLE OF CONTENTS 



Page 



EwiNG, H. E. The scorpions of the western part of the 

 United States, with notes on those occurring in northern 

 Mexico. No. 2730, pp. 1-24. May 24, 1928 ' 9 



New species: Vaejovis yosemitensis, Centruroides sciilpturatus . 

 New variety: Hadrurus hirsutus, var. arizonensis. 



GiLMORE, Charles W. A new fossil reptile from the Triassic 



of New Jersey. No. 2728, pp. 1-8. March 30, 1928^ 7 



New genus: Hypsognathus. 



New species : Hypsognathus fenneri. 



. A new pterosaurian reptile from the marine Cre- 



taceous of Oregon. No. 2745, pp. 1-5. June 25, 1928 ^.__ 24 

 New species: Pteranodon (?) oregonensis. 



GoNYER, Forest A. {see D. F. Hewett and Earl V. Shannon). 16 

 Hay, Oliver P. Further consideration of the shell of Chelys 



and of the constitution of the armor of turtles in general. 



No. 2724, pp. 1-12. March 21, 1928 1 3 



Hewett, D. F., Earl V. Shannon, and Forest A. Gonyer. 

 Zeolites from Ritter Hot Spring, Grant County, Oregon. No. 

 2737, pp. 1-18. June 12, 1928 1 16 



Hough, Walter. Fire-making apparatus in the United 

 States National Museum. No. 2735, pp. 1-72. June 22, 

 1928 1 14 



Howell, A. Brazier. Contribution to the comparative 

 anatomy of the eared and earless seals (genera Zalophus 

 and Phoca). No. 2736, pp. 1-142. January 26, 1929 ^ 15 



Krieger, Herbert W. A prehistoric pit house village site 

 on the Columbia River at Wahluke, Grant County, Wash- 

 ington. No. 2732, pp. 1-29. May 17, 1928 ^ 11 



Linton, Edwin. Notes on trematode parasites of birds. 



No. 2722, pp. 1-36. March 17, 1928' 1 



New genus: Minuthorchis. 



New species: Haematotrephus fodiens, Psilostomum lineaium, P. 

 plicitum, P. varium, Petasiger nitidus, Himasihla incisa, Apor- 

 chis rugosus, Ascocotyle plana, Minuthorchis sanguineus. 



LovERiDGE, Arthur. Field notes on vertebrates collected by 

 the Smithsonian-Chrysler East African Expedition of 1926. 

 No. 2738, pp. 1-69. June 20, 1928' 17 



' Date of publication. 



