762 MR. F. E. C. REED ON THE LOWER PALEOZOIC [NoV. 1 899, 



CosciNiUM cf. PROAVUM, Eichwald. 



There are several specimens in the Dublin Collection named Nebuli- 

 pora from the Tramore Limestones of Tramore which are closely 

 allied to Eichwald's Coscinium proavum of the E,ussian Orthoceras- 

 limestone/ The oval or subcircular fenestrules in the flabelliform 

 polypary are separated by celluliferous portions of six or seven rows 

 of cells measuring nearly twice the diameter of a fenestrule, and thus 

 the fenestrules are more distant one from the other than in the 

 Russian form, specimens of which I have examined as well as the 

 original figures and descriptions. 



Hyolithes cf. STRIATUS, Eichwald. 



Not uncommon in the Raheen Shales at Newtown Head, and 

 comparable to Eichwald's H. striatus from the Orthoceras-lime- 

 stone.^ Schmidt^ quotes it from the Erandschiefer (Kuckers Shale), 

 C 2. Eichwald mentions that there is a variety of the species with 

 the longitudinal striae fine and close together, and ours agrees with 

 this description. It is certainly distinct from any described British 



Measurements. 



mm. mm. 



Length 10 13-5 



Width at proximal end 3 4"5 



Gltptoctstis cf. PENNiGERA (Eichwald). 



The specimen described by M'Coy * as Acantlialepis Jamesii, and 

 believed by him to be a fish-scale, is in truth the plate of a cystidean. 

 This fact was noted by me when I examined the type in the Dublin 

 Museum in 1896 ; but I have subsequently found that so far back as 

 1860 Eichwald ' had assigned it to this group of echinoderms, and 

 compared it with his species Glyptocystis (= CJieirocrinus) penni- 

 gera from the Orthoceratite-limestone. Schmidt ^ described this 

 species more fully, and recorded it from the uppermost part of the 

 Orthoceratite-limestone and the ' Erandschiefer.' More recently"^ 

 he mentions it as occurring in the Kuckers Shale (Erandschiefer), 

 C 2, in association with Echinosphcera aurantium, etc. Haeckel ^ 

 has still more recently figured and redescribed it. 



The original Irish specimen was found at Newtown Head in the 

 Raheen Shales, and I have myself obtained a plate of the species 

 from the same locality. There are several specimens of it in the 

 Oeological Survey Collections. 



1 'Urw. Eussl.' pt. ii, p. 44 & pi. i, fig. 5; 'Leth. Eoss.' 1860, p. 398. 



2 'Leth. Eoss.' 1860, p. 1046 & pi. xl, fig. 15. 



^ Quart. Journ. Geol. Soc. vol. xxxviii (1882) p. 521. 



* ' Syn. Silur. Foss. Irel.' 1846, p. 7 & pi. i, figs. 1-2. 



5 ' Leth. Eoss.' 1860, p. 646 & pi. xxxii, fig. 1. 



^ * Neue u. wenig bek. Bait. -Silur. Petrefacten,' Mem. Acad, Imp. Sei. St. 

 Petersb. vol. xxi (1874) No. 11, p. 15 & pi. i, figs. 7-12, pi. ii, figs. 1-3. 



'' Quart. Journ. Geo!. Soc. vol. xxxviii (1882) p. 521. 



^ 'Die Amphorideen u. Oystoideen: Beitr. z. Morph. u. Phylog. d. Echinod.' 

 Eestschr. z. 70ten Geburtstage v. 0. Gegenbaur, vol. i. (1896) p. 150 & pi. iv. 



