34 BULLETIN 65, UNITED STATES NATIONAL MUSEUM. 



DICTYONEMA FILIRAMUS Gurley, new species. 



Gurley's description of this species is as follows: 



Polypary varying from flabelliformly compressed, nearly and regularly semi- 

 cin-ular, about 25-30 mm. in radius, to flahellate expansions 14 or more cm. 



39 



Figs. 38, 39. — Dictyonema filikamus, new specie.s. Two small rhabdcsomes. 



in diameter. Branches straight or uniformly curved, mostly 0.3 mm. wide, 

 reaching 0.4 mm., especially near the base; set about 40 in 25 mm. (7-9 in 

 5 mm., the strong radiation 

 p r eventing counting for 

 longer distances.) Bifurca- 

 tions narrow, tending to 

 V-shape. Dissepiments ex- 

 ceedingly fine ; rather uni- 

 formly 1 mm. apart, occa- 

 sionally two as close together 

 as 0.5 mm.; quite uniformly 

 transverse. Meshes quite 

 regular, rectanguhir. Too 

 few thecte are visible to per- 

 mit of any accurate estimate 

 of their number, but they 

 seem to be something like 

 100 or more in 25 mm. 



Horizon and locality. — 

 Xot uncommon in the 

 dolomite and chert at fk;. 40. — dictvunema filiramus, .new species, .a 

 Hamilton, Ontario. khabdosome of medium size. 



Cotype,s.—Cat. No. 55303, U.S.N.M. 



DICTYONEMA DESMOIDES Gurley, new species. 



Plate 4. figure 3. 



Gurley describes this species as follows: 



Polypary cyathiform, flabelliformly compressed, tending to spread rather 

 widely, with branches 0.5 mm. (0.4-0.6 mm.) wide, the central ones usually 

 straight, or only slightly undulate, the lateral ones diverging moderately, or 



