and species of Silurian Radiata. 289 



at a very acute angle, about ten interstices in the space of 2 

 lines ; mesial keel very strong, with a row of small pores ; 

 fenestrules very regular in size and shape, quadrangular, 

 slightly longer than wide, their width about equaling that of 

 the interstice; usually three large thick -edged pores to the 

 length of a fenestrule and one larger at the end of each 

 dissepiment. 



In size, mode of branching, and rigid straightness of the in- 

 terstices, this is not unlike the F. subantiqua, but is completely 

 distinguished by its closer dissepiments, forming shorter fenes- 

 trules, and its much fewer and larger pores. From the row of 

 pores on the keel, this would enter Si. D^Orbigny^s subgenus 

 Fenestellina. I suspect, from some specimens I have seen, that it 

 is possible some of the figures given by Lonsdale in the ' Silurian 

 System * as the Fenestella prisca (Gold, sp.), may be coarse, in- 

 accurate representations of this species ; if this should even prove 

 so, the name I propose should be retained, as it has no affinity 

 with the large Devonian coral of Goldfuss, with which I am well 

 acquainted. 



Not uncommon in the Wenlock limestone of Dudley. 



ECHINODERMATA. 



Taxocrinust Orbignii (M'Coy). '"'^'-* ^*^^' 



Sp. Char. Column cylindrical, about 2 lines in diameter at an 

 inch from the pelvis, and not varying materially in character 

 within 2 inches from the pelvis; joints finely granulated, 

 uniform, two in the space of 1 line ; pentagonal pelvic plates 

 1 line high, alternating with which are the pentagonal or ob- 

 scurely heptagonal scapulae, nearly 1^ line long; arms of two 

 quadrangular and one cuneiform joint each 1 line long, and 1^ 

 line wide, the latter giving ofi" two hands of five joints, the 

 last being cuneiform, and giving origin to two fingers ; from 

 pelvis to end of fingers 1 inch 3 lines. 



I have not distinctly made out the interbrachial plates, but 

 as there seems a notch between the upper adjacent edges of the 

 scapulae, I have little doubt they existed ; besides their presence, 

 the species is easily distinguished from the Ichthyocrinus pyri- 

 formis (Phill. sp.), by the gi-eater number of joints in the arms 

 and hands, the much thicker column, and the nearly unvarying 

 character of the joints as they approach the pelvis. 



In the " Asterias '' bed of the Upper Ludlow at High Thorns, 

 Underbarrow. 



Glyptoci'inv^ basalis (M^Coy). 



Sp. Char. Cup subpyriform, pelvic plates hexagonal, slightly 



