REPORT OF THE DIRECTOR I919 



103 



counted in our specimen. The latter are, owing to the imperfection 

 of the material through flattening of the specimen much obscured. 

 The section of the specimen, seen along a fracture, is very flat lenti- 

 cular, without a trace of a median line or layer, that might have re- 

 sulted from the presence of a general cloaca, making the cylinder a 

 hollow one. 



We have referred this species to the genus Dystactospongia Miller, 

 because it has in common with that genus, as represented by the 

 genotype D. insolens, the system of paragasters with radiat- 

 ing furrows. We are well aware of the fact that the skeletal system 

 of that genus is still unknown and that for that reason it has but 

 little standing in modern spongiology and, moreover, may finally 

 turn out to have an entirely different skeletal structure than our 

 form. Nevertheless, as an American author on sponges has aptly 

 remarked, even though the structure of these sponges is as yet con- 

 jectural, they need names before all so that they may be noticed and 

 handled by collectors and in the literature. We may leave then to 

 time the production of better specimens, and the elaboration of their 

 skeletal structure. 



2Trematis punctostriata Hall. var. minor nov. 



This well-characterized species, hitherto known only from the 

 middle Trenton (Hermitage) of Tennessee and Kentucky has been 

 found in numerous, though mostly fragmentary and small, speci- 



Fig. 53 



Fig. 54 



Fig. 55 



Fig. 56 



Fig. 57 



Figs. 53-51^ Trematis punctostostriata Hall var. minor nov. 

 Fig. 53 Type X3. Fig. 54 Cotype x2. Fig. 55 Enlargement of sculpture. 

 Fig. 56 Pedicle-valve, X3. Fig. 57 Trematis terminalis (Emmons) x2. 



