REPORT OF THE DIRECTOR I919 lOI 



Schizocrania filosa Hall r 



Dalmanella cf. rogata Sardeson r 



Conularia papillata Hall rr 



C. gracilis Hall 



Serpulites angustifolius {Hall) c 



S. gracilis Ruedemann 



Liospira cf. subtilistriata (Hall) r 



Triarthrus becki Green c 



Calymmene senaria Conrad c 



Isotelus gigas Dekay r 



Ulrichia bivertex (Ulrich) c 



Primitiella unicornis (Ulrich) c 



Primitia sp. 



Aparchites minutissimus (Hall) c 



While there are already present a considerable number of Utica 

 forms, the fauna as a whole differs in aspect from the later lower 

 Utica in the presence of such Canajoharie species as C 1 i m a c o - 

 graptus spiniferus, Ulrichia bivertex and 

 Primitiella unicornis. In Conularia papil- 

 lata, C. gracilis, Serpulites gracilis, Chauno- 

 graptus gemmatus, the horizon affords peculiar types 

 possibly restricted to it. 



9 Additions to the Snake Hill and Canajoharie Faunas 



The Snake Hill shale of the Hudson River valley, of lower and 

 middle Trenton age, has afforded a large and peculiar fauna, of 

 which eighty-three species have been listed thus far (Ruedemann, 

 1912, p. 62, 6^), many of them new to science. It seems worth 

 while to record in this place additions to this fauna from the tem- 

 porary exposures at North Albany and at Watervliet, a few miles 

 north of Albany. 



I Dystactospongia radicosa nov. 

 Description. Sponge of medium size elongate, probably cylindri- 

 cal and originally of massive structure. Paragasters small, widely 

 apart on surface, surrounded by radiating and anostomosing fur- 

 rows. The latter contain scattered depressions, apparently former 

 apertures (postica), that in some places become so closely crowded 

 as to constitute the furrows. The lower ( ?) or supposedly basal 

 portion of the sponge shows concentric wrinkles, suggestive of the 

 presence of an epithecal layer. Skeletal elements mostly destroyed, 

 through solution and compression; those noticed apparently of a 

 nature that would indicate a composition of tetraxons similarly as 

 is found in aulucopoid Lithistidae. 



