86 PROCEEDINGS OF THE AMERICAN ACADEMY 



3. Anisopus gracilior. The Anisopus is also regarded in the 

 Ichnology as Marsupialoid ; but also Loricoid. 



4. Brontozoum isodacttlum. The B. isodactylum of the Ich- 

 nology is probably identical with Anomcepus intermedins, and therefore 

 stricken out. The present is substituted, — a much larger species. 



5. Grallator parallelus. Having the form of Grallator cur- 

 sorius, but much larger, yet with even a smaller stride. 



6. Harpedactylus crassus. ) Beautiful species, which I can 



7. Harpedactylus gracilior. J hardly doubt belong to this genus. 



8. Trihamtjs elegans. I make of this a new genus (Trias and 

 Hamus, three hool's) as well as species, because I cannot refer the very 

 distinct specimen which contains it to any genus of the Ichnology. It 

 seems to have been a biped, so far as we yet know. 



9. ExoCAMPE MINIMUS. Differs from the JE. ornafa of the Ich- 

 nology chiefly by its minuteness. 



10. Apatichnus curvatus (No. -^o* of the Cabinet). A fine 

 track, doubtless undescribed ; but I am not sure it is an Apatichnus, 

 for as yet we find no fore-foot. 



11. Grammichnus Alpha. The Ichnology has two species of 

 Grammepus, which means that the foot has the form of letters : Gram- 

 michnus implies that the track has that form. This is the true idea; 

 and I should prefer if Grammepus were stricken out. Yet the Gram- 

 michnus Alpha is totally unlike the Grammepus of the Ichnology. It 

 has the appearance of a repetition of the capital A impressed cross- 

 wise upon the trackway. But I cannot imagine even by what class of 

 animals it was made. 



12. Ampelichnus sulcatus. This is the same as the Grammepus 

 uniordinatus of the Ichnology. But a more careful examination shows 

 it to be totally unlike the Grcmimepus erismatus. It is named from a 

 not very close resemblance to a vine with its clusters (a/in-e^oy). I 

 cannot refer it to any known class of animals. 



13. Lunula obscura. This new genus is characterized by lunate 

 impressions along the sides of an axis ; and perhaps they are made by 

 a Myriapod. But the specimens are rather indistinct. 



14. BiSULCUS UNDULATUS. 



15. Trisulcus laqueatus. The Ichnology has a Unisulcus. 

 The etymology of the above two new genera will show their essential 

 character. They were doubtless Annelids. 



