DESCRIPTIONS Of THE BPBOIBS. 17£» 



/'. Pailletiei from the Eifel, though he subsequently separated it from the Spanish 

 type by its present specific name. It was, however, never described until the publi- 

 cation of Schultze's • Monographic der Echinodermen des Eirler Kalkes,' in which 

 two lateral and two summit views of it are shown. We do not think, however, that 

 the two individuals which are figured can properly be referred to the -ami' species. 

 The original of figs. 5 b and 5 c is most like P. Paillettei, ami must therefore be 

 considered the type of the species. There is a nearly similar individual in the 

 National Collection (PI. V. figs. 1, 2) ; but apart from the characters which are men- 

 tioned by Roemer and Schult/.e, its live large spiracular openings sharply distinguish 

 it from /'. Paillettei (PI. IV. figs. 8, 10), and also from P. Lusitanica, which it more 

 closely resembles in the external form of the calyx (PI. IV. figs. 11, 12; PI. V. fig. 20). 



Prof. Roemer has kindly sent us two specimens of P. Eifelensis for examination, 

 and we find that they represent the two types figured by Schultze, but we cannot 

 refer them to the same species. "We propose therefore to restrict the name P. Eifel- 

 ensis to the more flat-topped form which resembles P. Paillettei, and to describe the 

 other in another place l by the name P. Roemcri. It is figured on PI. V. fig. 13, and 

 PI. XVI. fig. 11, and also on Taf. xiii. figs. 5, 5 a of Schultze's Monograph. 



The latter author thought that he could trace a considerable resemblance between 

 the radials of Pentremitidea Eifelensis and those of Pentrcmitcs obliquatus, Roemer, 

 when the truncation of their lower ends in the American species was left out of 

 consideration. Apart from the larger size of the radials in this type (PI. XVIII. 

 figs. 10-12), their ambulacra are relatively much narrower than those of Pentremi- 

 tidea Eifelensis, and the character disregarded by Schultze is one of those which are 

 specially distinctive of the genus Tricalocrinus (PI. XIX. fig. 13), while the radials 

 of the German species are transversely arched. We think therefore that there will 

 be no chance of any confusion of the two types. 



Locality and Horizon. Gerolstein : Eifel Limestone, Middle Devonian (auctorum), 

 or Lower Devonian (Barrois). 



Pentremitidea Malladai, E. &• C. 

 (PI. V. figs. IS, 19.) 

 Pentremitidea Malladcc, E. & C, Aim. & Mag. Nat. Hist. 1883, vol. xi. p. 213. 

 Sp. Char. Calyx pentagono-pyramidal, expanding gradually upwards ; summit 

 truncate and relatively large, diameter 7-5 millim. ; section pentagonal, with wide 

 and shallow reentering angles between the ambulacra; periphery at about one third 

 of its length from the summit. Basal plates forming a strong broad and deep cup. 

 Radial plates quadrangular, the bodies slanting sharply downwards, and rather shorter 

 than the limbs, which curve upwards towards the summit, thus increasing its appa- 

 rent breadth ; lips projecting ; sinuses long, narrow, and curved downwards, with a 

 radial angle of 111°. Ambulacra narrow, of nearly uniform width throughout; 

 1 la the columns of the ' Geological Magazine. * 



