314 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [May 7, 



Hamilton groups, from Akron, Oliio, which I cannot distinguish 

 from the above species, first recognized by me in the Lower Coal- 

 measures of ]S"ova Scotia, and noticed in my paper on the " Lower 

 Carboniferous Coal-measures of British America," Quart. Journ. Geol. 

 'tSoc. 1858, vol. XV. p. 68. L. corrugatmn, like other Lepidodendra, 

 presents many varieties of growth and preservation ; but Prof. Hall's 

 specimens are quite nndistinguishable from some of those in my 

 cabinet from the Lower Coal-measures of Horton, JN'ova Scotia. 



2Q. Lepidosteobus Richaedsoni, Dawson. 



'Canad. Kat.' vol. vi. p. 174, fig. 10. 



'^ Axis not distinctly preserved ; form cylindr'iccd (?) ; scales oblong, 

 ivith an obscure midribj^ Prom Perry, Maine. 



27. Lepidosteobus globosus, Dawson. 



Bound or roundish oval, covered luith obscure pointed scales. 



This and the preceding are very distinct but puzzling objects, 

 collected by Mr. Eichardson at Perry, and are probably the fructi- 

 fication of Lepidodendra or allied plants. 



2S. Lycopodites Matthewi, Dawson. 



' Canad. Nat.' vol. vi. p. 171, fig. 8. 



^^ Leaflets one-veined, narrowly ovcde-acuminate, one-tenth to one- 

 fourth of an inch in length, somewhat loosely placed on a very 

 slender stem, apparently in a pentastichous manner. ''^ 



This species was described from specimens found by Mr. Matthew 

 in the graphitic shale in the city of St. John. Somewhat larger 

 specimens have since been obtained from the same bed ; but I have 

 not seen the plant elsewhere. 



29. Lycopodites Vanuxemii, sp. nov. PL XYII. fig. 57. 



Hall's * Keport on the Geology of New York,' p. 273, fig. 125 ; 

 Yanuxem's ' Eeport, Geol. New York/ p. 175, fig. 46. 



Stem slender. Leaves pinnate, contiguous, linear, about half an inch 

 in length. 



This plant appears as graceful, feathered stems, apparently grow- 

 ing in groups. It seems to be very closely allied to L. pinnoifonnis, 

 Goeppert, difi'ering chiefly in its more slender stem and shorter pin- 

 nules. Still it is very doubtful if it were really a Lycopodiaceous 

 plant. Its leaves were certainly |in one plane, and some of the 

 specimens show that they were flattened horizontally, like the fila- 

 ments of a feather. It may have been related to Perns rather than 

 to Lycopodiaceo2. It occurs in the Chemung group, at Ithaca, New 

 York. It is weU figured in Hall's ' Keport/ p. 273; fig. 125, and in 

 Yanuxem's * Eeport/ p. 175, fig. 46. 



