8G 



NEW 



These notes do not confirm J. Agardh's observations, but rather 



show that the development of the fruit of Callophyllis obtusifolia 

 agrees in main points with the mode of development which 

 Bornet (' Notes Algologiques,' i. pp. xviii-xix) has described of 

 the cystocarps of Qymnogongrus and CaUymenia, and Schmitz 



(' Untersuchungen iiber die Befruchtung der Florideen,' p. 30) of 



Gigartina and Chondrus. 



EXPLANATION OF PLATE XV. 



Fig. I. Section through mature cystocarp of Callophyllis obtusifolia 



Fig. 2. Section through ostiole. 



Fig. 3, a, b, c, d. Spore-clusters. 



Fig. 4. Spores germinating within cystocarp. 



On xi new Fossil Plant from the Lower Coal-Measures. By 



Thomas Hick, B.A., B.Sc, Assistant Lecturer in Botany, 

 Owens College, Manchester. (Communicated by Wm. 

 Cabruthers, Esq., F.R.S., F.L.S.) 



* 



[Read 19th November, 1891.] 

 (Plates XVI. & XVII.) 



The specimen described in the following pages was found by 

 W. Cash, Esq., at Cinder Hills, Siddal, near Halifax, who, 

 though himself a student of Coal-Measure botany, has generously 

 placed its description in my hands. 



The external appearance bears some resemblance to that of 

 Stigmaria, as its surface carries a series of markings which have 

 a quincuncial arrangement (PI. XVI. fig. 1, a); but whilst the 

 markings of Stigmaria are usually depressed scars, those of the 

 specimen are slightly elevated and differ in other respects. 

 "When found, it was about l'l decimetre in length, with a dia- 

 meter of about 5 centimetres, and though generally cylindrical 

 in shape, was slightly compressed on two opposite sides. 



The description of its anatomy and histology is based upon 

 half a dozen transverse sections and a number of short longi- 

 tudinal ones, partly radial and partly tangential, prepared by 

 Mr. James Lomax, of Eadcliffe. It is not pretended that any 



