578 TRANS. ST. LOUIS ACAD. SCIENCE. 



branches are apparently all independent, not being connected by 

 transverse dissepiments, as in that genus (although some of the 

 branches touching each other have occasionally the appearance 

 of connecting filaments), and are only united in one mass at the 

 root. When fallen some of the branches overlie others as in 

 a semi-anastomose structure; the form may be circular or fan- 

 shaped. Four species of this genus are known. 



Calyptograptus cyathiformis, nov. sp. 



Plate 3. Fig. :5. 

 Calyptograptus cyathiformis (Spencer). Can. Nat., vol. viii., No. 8, IS7S. 



Frond cyathiform, with numerous bifurcating branches, united 

 only at the base, with no lateral processes. The axis consists 

 of a black corneous substance, which is striated longitudinally. 

 The fallen frond has some of the branches overlying each other, 

 giving somewhat the appearance of an irregular net-work. The 

 radicle consists of a well marked, thick, corneous mass. The 

 branches are divided into two or three small terminations, 

 which probably mark the beginning of new branches. The 

 branches are rather over one millimetre in breadth. The speci- 

 men under consideration is most interesting. When obtained the 

 frond had a general ftabellate form with the radicle well-marked, 

 having branches radiating to nearly a semi-circle ; but, on trim- 

 ming the specimen, the portion of the stem with the radicle 

 was chipped oft", and revealed the remainder of a beautiful frond 

 ■which was now shown to be circular, the frond having been bent 

 partly over in the mud, and having the lower portion covered be- 

 fore the whole was flattened in the sediment — thus proving the 

 funnel-shaped character when living. 



Only one specimen has been found ; this is six centimetres in 

 diameter, and from the base of the root to the top of the branches 

 it measures four centimetres. 



Formation and Locality. — It occurs in the Niagara limestone 

 beneath the "chert-bed" at the "Jolly-cut," Hamilton, Ont. 

 Calyptograptus subretiformis, nov. sp. 



Plate 4. Figs. ] & ■->. 

 Calyptoijraptus subretiformis ^Spencer). Can. Nat., vol. viii., No. S, 187S. 



Frond circular or flabellate, but cyathiform in its growing state. 

 There are numerous bifurcating branches, which in the fossil con- 



