28 PHYLLOXHECA. 



pointed out that the resemblance between Etheridge's plant and 

 Cingularia typica is more apparent than real, in that the sheath in 

 the latter spreads horizontally from the point of attachment, and is 

 not contracted as in Phyllotheca. Cingularia is also distinguished 

 by the characters of the fructification, which are entirely unknown 

 in the case of Australian Phyllotheca, and consequently there are 

 no good reasons for a close comparison between these two plants. 



The Sedgwick Museum, Cambi'idge, has recently acquired 

 some specimens of this interesting plant, and I have found that 

 Mr. Etheridge's original description applies very closely, with 

 the exception of the striae of the sheath between the nerves, 

 which the preservation in these specimens will not permit one 

 to distinguish. The contracted lower portion of the sheath is, 

 however, well seen. As Mr. Etheridge, jun., has not named this 

 plant specifically, and as it appears to be distinct from other 

 members of the genus, I have pleasure in calling it after him. 



I agree with Zeiller, 1 who has suggested that the specimens 

 with free leaves, which are also figured by Etheridge, 2 are not 

 identical with this new species. 



Known only from Shepherd's Hill, in the Newcastle Series of 

 New South Wales. 



Not represented in the British Museum collection. 



7. Phyllotheca Zeilleri, Etheridge, jun. 



1901. Phyllotheca Zeilleri, Etheridge, jun., in Anderson, 1st Rep. Geol. 

 Surv. Natal, p. 72, pi. xiii, figs. 1-6. 



Pith-casts articulate ; internodes long, strongly ridged and 

 grooved, 6 cm. or more in length ; ridges and grooves continuous 

 at the node, slightly convex, broad, delicately striate, with an 

 average width of 1-Hmm. Small scars occur in some specimens 

 at the nodes between the costal endings and opposite the grooves. 

 Leaf-sheath shallow, collar-like ; free segments long, very narrow 

 linear, acute, spreading, to the number of thirty, 2-7'5cm. long. 



The specimens on which Mr. Etheridge, jun., has founded this 

 species are the best examples of Phyllotheca which have as yet 



1 Zeiller (02'), p. 31. 2 Etheridge (95), pi. xviii, figs. 4, 5. 



