Artis's Aniediluvian Phytology. 299 



situated immediately under the reservoir : does not appear to 

 have been found in our coal-formations elsewhere. 



decurrens. Leaf or fi-ond tri- or quadri-pinnate ; leaflets 

 linear-lanceolate, first leaflets decurrent ; ribs pinnate. — Found 

 in great abundance in the shale at Alverthorpe near Wake- 

 field; also in the coal-mines belonging to the marchioness of 

 Hertford, near Leeds. 



Sternbeiigia. Stem vi^ith double longitudinal keels, termi- 

 nating at different heights spirally round the stem, and fur- 

 nished at their termination with small tubercles. 



transversa. Stem ringed transversely ; rings mostly distinct, 

 sometimes uniting two or more together. — Found lying hori- 

 zontally, accompanied with Calamites ramosus and C. pseudo- 

 hamhiisia, in the clay-bind which alternates with the sand- 

 stone of Lea-brook quarry. 



Rhytidolepis, Sternberg. S^^m simple, furrowed J^troajs 

 wavy, impressed with dots or simple lines placed on the ridge. 

 Jihrosa, Cicatrices ovate, subpentagonal, with a single 

 gland ; surfaces of the ridges fibrous. — Found vertical in the 

 sandstone of a quarry at Rowmarsh near Rotherham, in 

 Yorkshire ; and a congeneric fossil very nearly allied to it in 

 El-se-car. 



Myriophyllites, Sternberg. Stem herbaceous, slender; 

 leaves numerous, linear, small. 



gracilis. Stem terminating in a sharp point, the whole 

 thickly covered with hair-like leaves. — Found in El-se-car. 

 Euphorbjtes VULGARIS. Common Euphorhites. 



Gen. Char. — Stem arborescent, simple, subconical, far- 

 rowed ; cicatrices on the ridge, generally nicked. 



Spec. Char. — Euphorbites vulgaris. Cicatrices flat, fish- 

 shaped, the upper part trigonal ; glands two, which when the 

 bark is absent appear as twin tubercles on the ligneous fibres. 



Synonyms. — This fossil plant does not appear to have been 

 described or figured by any author. 



Description and locality. — Stem attains the length of nine 

 feet, very wide at bottom, and narrower at the upper extre- 

 mity, furrowed. 



Furro-iVs at the-upper end narrow, but at the lower end 

 much expanded, as shown in the lower figure : ridges of the 

 upper extremity pipe-like, parted by a simple line ; but those 

 of the lower extremity wide, flat, and parted by a groove of 

 equal breadth. 



Cicatrices on the bark flat, resembling fishes, the upper 



part three-sided, the upper angle forked ; the lower rounded ; 



glands two, towards the upper part of the cicatrix. When 



the bark is absent, the woody part presents a fibrous appear- 



P p 2 ance 



