NATURAX HISTORY SOCIETY OF GLASGOW. 329 



described. It is also distinguished from G. pluma, Phillips, by 

 having the pores of the stem twice their own diameter apart, 

 tliose of Phillips' species "occupying the entire of the poriferous, 

 surface." (M'Coy, Carb. Foss. Ireland, p. 199). 



Glauconome aspera, sp. nov. 

 Plate iii.. Figs. 22-24. 



Polyzoary erect, branching. Stem and branches round, bearing 

 two rows of alternate cells. Cells round or oval, with raised 

 tubercular lips, which are continued, though less prominent, from 

 cell to cell, and include between them two or three parallel smaller 

 tubercular ridges. Surface covered with short sinuous tubercular 

 ridges, of irregular lengtlis, so that no mesial ridge can ])e recog- 

 nised, the stems being, moreover, slightly twisted, so that the cells 

 do not appear in the same plane. Branches similar to stem. 

 Reverse more regularly striated longitudinally, the striae being 

 closely tubercular. About ten cells in one-eighth of an inch. 



Locality: Hairmyres, East Kilbride. 



This species is very distinct, and much resembles G. (Diplopora) 

 marginalis, in the absence of secondary pinnules between the 

 cells. The ornamentation of the surface is very distinctive. 



Glauconome flexicarinata, sp. nov. 

 Plate ii., Figs. 1-7. 



Polyzoary erect, branching bipinnate, the bipinnate branches 

 being given off at intervals. Branches form, on the average, an 

 angle of 40*^ with stem, and turned slightly towards the non- 

 poriferous aspect. 



Cells alternate, lanceolate oval, rather more than their own 

 length apart; one cell between each pair of pinnules, and one in 

 line with the upper row of cells on the pinnule. Each cell of the 

 stem equals one-third of the transverse measurement of the stem. 

 Those of the branches are smaller, and regularly alternate, as on 

 the stem. The secondary branchlets are several cells apart. 

 The ornaments of the surface are ridges and tubercles of various 

 sizes. The broad prominent mesial ridge undulates regularly 

 from side to side, following the alternations of the cells. This 

 ridge bears small, close-set tubercles, a large one occurring as the 

 centre of each alternate curve. Two tubercular ridges run parallel 

 to the keel on eacli side. They form prominent lips on each side 



