408 B. S. Lull — Life of the Connecticut Trias. 



number does not seem excessive. In fact, I imagine it may 

 fall far short of the number of continental invertebrates of 

 Newark time. My own grouping modified from that of 

 Hitchcock (1889) is as follows : 



Phylum Arthropoda 

 Class Insecta 



Genera Acanthichnus with 9 species ; Bifurculapes with 

 5 species ; Lithographies with 3 species ; Copeza with one 

 species ; Hexapodichnus with 2 species ; Conopsoides with 2 

 species ; Harpepus with one species ; Sagittarius with one 

 species. 



Class IncertBe sedis 



Genera Lunula, one species ; Pterichnus, 2 species ; Ham- 

 ipes, one species ; Sphoerapus, 2 species ; Grammepus, 2 

 species ; Stratifies, one species ; Saltator, 2 species. 



Phylum Vermes 



The old term Vermes is used as being more non-committal 

 than Annelida, as one cannot be sure that in every case the 

 following track-makers were oligochete annelids, though doubt- 

 less some were. 



Genera Herpystezoum with 4 species ; LLalysichnus, 2 

 species ; Cunicularius, one species ; Cochlea, one species ; 

 Cochlichnus, one species. 



Phylum Mollusca ? 



Under this head are placed some peculiar multiple trails, the 

 duplication of which seems to debar them from the worms. 

 Genera Bisulcus, one species ; Trisulcus, one species. 



Genera of doubtful origin and character. 



Genera Harpagopus, one species; G-rammichnus, one 

 species ; Climacodichnus, one species ; JEnigmichnus, one 

 species. 



The Aquatic Vertebrates. 



Among the vertebrate fossils found in the Newark rocks of 

 the Connecticut valley, two classes, fishes and reptiles, are rep- 

 resented by actual osseous remains ; the latter surely, and prob- 

 ably the Amphibia, are recorded by their footprints. Whether 

 or not the two higher classes, the birds and mammals, are rep- 

 resented is not yet proven, though mammalian remains are 

 known from the Newark system in North Carolina and the 



