278 CATALOGUE OP THE BLASTOLDEA. 



with Pentatrematites in fata, Sowerby l , but Prof. F. Roemer, in his ' Monograph,' 

 placed it as a synonym of de Koninck's other species Pentremites Orbignyanus. 

 Messrs. cle Koninck and Le Hon in their turn showed that both these references 

 were wrong, and proposed for the species its present name. 



Pluvnoschisma caryophyllatum is the abnormal species of the genus. It is shorter, 

 rounded, and more depressed than any of the others, and the ambulacra are, to a 

 great extent, petaloid (PI. XIV. figs. 4, 5). For the side plates merely rest against 

 the lancet-plate as in Pentremites (PL I.), and not on it as in PhcenoscMsma Archiaci 

 (PI. XIV. figs. 5-7). 



In Roemer's figure of P. caryophyllatum, and again in those given by de Koninck 

 and Le Hon and Billings, a very misleading feature is shown. The hydrospire-slits, 

 instead of issuing from beneath the side plates outwards and downwards, are repre- 

 sented as coming from beneath them upwards and outwards, i. e. towards the radial 

 centre. They are correctly drawn, however, in the side views, figured by both de 

 Koninck and Roemer. 



Locality and Horizon. Tournay, Belgium : Lower Carboniferous Limestone Shale. 



PlIiENOSCIIISMA Bexniei, sp. nov. 



(PI. II. fig. 37; PI. IV. figs. 5, C.) 



Pentremites, sp., Etheridge, Jr. (pars), Proc. Nat. Hist. Soc. Glasgow, 1881, vol. iv. pt. 2, 

 p. 2G0, t. 5. f. 7. 



Sp. Char. Calyx small, short, and bud-like ; base very small, and cup-like ; peri- 

 phery at the radial lips, nearer the base than the summit. Basal plates very small, 

 forming a low cup. Radial plates broadly oblong ; bodies angular in the middle 

 line, with two faint impressed lines passing obliquely downward from the lip, one on 

 each side ; limbs about equal to the bodies in length, parallel-sided, truncated above ; 

 sinuses wide, with moderately high inturned sides, and rim-like edges, lips pointed 

 and projecting; interradial sutures in depressions. Deltoid plates small, triangular, 

 and quite apical. Ambulacra long, narrow, and almost parallel-sided, tapering 

 slowly, and situated low down in the sinuses ; side plates oblong, with slit-like 

 sockets ; lancet-plates exposed only in the ambulacial grooves. Hydrospire-slits 

 four on each side, wide and very apparent, two of them covered by the side plates. 

 Ornament consists of microscopic lines arranged parallel to the margins of the 

 plates. 



Panaris. This little species is of the greatest interest both from the fact of its 

 being the only regular Blastoid yet found in the Carboniferous rocks of Scotland, 

 and from its generic relations. 



Tin specimen originally figured by one of us was not in a sufficiently good state 

 of preservation to exhibit some of its more essential points of structure. But other 



1 This is the Orophocrinus verus, figured on PL XV. figs. 1-5. 



