XIV LIST OF ILLUSTRATIONS 



A REVISION OF THE NORTH AMERICAN SPECIES OF THE~GENUS ArGYRA 



Macquart, two-winged flies of the family Dolichopodidae 



By M. C. Van Duzee 



Facing pa?e 



1. North American species of the genus Argyra 44 



A new proliferating larval tapeworm from a porcupine 



By Benjamin Schwartz 



I. Taenia twitchelli, new species 4 



On the occurrence of remains of fossil porpoises of the genus 

 Eurhinodelphis in North America 



By Remington Kellogg 



1. Dorsal and ventral views of type skull of Eurhinodelphis bossi 40 



2. Lateral view of type skull of Eurhinodelphis bossi 40 



3. Dorsal view of type mandible of Eurhinodelphis bossi 40 



4. Posterior view of type skull of Eurhinodelphis bossi 40 



5. Ventral view of a skull of Eurhinodelphis bossi 40 



6. Views of scapula, cervical, and epiphysis of Eurhinodelphis bossi 40 



7. Views of dorsal vertebrae of Eurhinodelphis bossi 40 



8. Views of dorsal and lumbar vertebrae of Eurhinodelphis bossi 40 



9. Views of dorsal and lumbar vertebrae of Eurhinodelphis bossi 40 



10. Views of caudal vertebrae of Eurhinodelphis bossi 40 



II. Lateral views of caudal vertebrae of Eurhinodelphis bossi 40 



12. Views of caudal vertebrae and humerus of Eurhinodelphis bossi 40 



13. Ventral views of caudal vertebrae of Eurhinodelphis bossi 40 



14. Lateral views of ribs of Eurhinodelphis bossi 40 



15. Dorsal and ventral views of a skull of Eurhinodelphis bossi 40 



16. Views of two skulls of Eurhinodelphis bossi 40 



17. Lateral view of a skull of Eurhinodelphis bossi 40 



A fossil physeteroid cetacean from Santa Barbara County, 



California 



By Remington Kellogg 



1. Views of rostrum and mandibles of Ontocetus oxymycterus 8 



2. Views of rostrum and right mandible of Ontocetus oxymycterus 8 



Mineralogy and petrography of Triassic limestone conglomerate 

 metamorphosed by intrusive diabase at Leesburg, Virginia 



By Earl V. Shannon 



1 . Replacement of limestone conglomerate along fissure 32 



2. Crust of datolite crystals 32 



3. Anhydrite molds, calcite, datolite, and barite 32 



The puparia and larvae of Sarcophagid flies 



By Charles T. Greene 



1-8. The puparia of Sarcophagid flies __ 26 



9. The larvae of Sarcophagid flies 26 



