174 CATALOGUE OF THE BLASTOIDEA. 



close raised lines parallel to the margins of the various plates, those on the lower 

 portions of the basal plates being of a V-shaped pattern. Column unknown. 



Remarks. This is a well-marked species, which may be at once distinguished from 

 Pentremitidea clavata, Schultze, sp. (PI. IV. fig. 18), and from the majority of the 

 other species, by the outline of the calyx. It differs sharply from P. Paillettei in the 

 lobation of the radials, the smaller angle of inclination of the sinuses, and in their 

 relatively shorter length. P. Lusitanica to a certain extent resembles P. Eifelensis, 

 Roemer, sp., of which Schultze has given a figure. Indeed, this species is its 

 nearest ally ; but here, again, the radial angle is quite different, and gives to the 

 Eifel species the appearance of possessing a longer and more curved sinus in each 

 radial, and a very much less breadth across the summit (PI. V. figs. 1, 2). 



Locality and Horizon. Ferrones, Province of Asturias, Spain : Calcaire de Fer- 

 rones, Lower Devonian. 



Pentremites Eifelensis, F. Roemer, sp. 

 (PI. V. figs. 1, 2.) 



Pentatrematites Pailleti (pars), F. Roemer, Archiv f. Naturgesch. 1851, Jahrg. xvii. Bd. i. 



p. 3G8. 

 Pentatrematites Eifeliensis, F. Roemer, Bronn's Lethsea Geogn. Dritte Aufl. 1852-54, 



Theil 2, p. 280 (footnote). 

 Pentremites Eifeliensis, Schultze, Denkschr. k. Akad. Wissensch. Wien. 1867, Bd. xxxvi. 



Abth. 2, p. 223, t. 13. f. 5 b, c (?f. 5, 5 a, d, e). 

 Pentatrematites Eifeliensis, F. Roemer, Letbaea Geogn. 1876, Theil 1, Atlas, t. xxvii. 



f. IS a, b. 

 Pentremitidea Eifelensis, E. & C, Ann. & Mag. Nat. Hist. 1882, vol. ix. p. 223. 



Sp. Char. Calyx small, elongately pyriform : summit small, gently convex, peri- 

 stome concave ; base slender, oval above, but becoming triangular below, with 

 flattened sides, forming almost one half the total length of the calyx ; section 

 pentagonal; periphery at the radial lips less than a third the total length of the 

 calyx from the summit. Basal plates small, elongate, convex in their upper portions, 

 angular and subcarinate below. Radial plates oblong, much arched transversely, 

 each about equally divided into body and limbs, or perhaps the latter a little the 

 longer ; interradial sutures in concavities ; sinuses half the length of the radial 

 plates, margins straight, simple, and subparallel ; lips plain, not enlarged or much 

 projecting. A line drawn transversely through the lip indicates the widest part of 

 each plate. Ambulacra straight, projecting direct from the summit, not curved, and 

 depressed below the edges of the sinuses; lancet-plates completely covered by the 

 side plates, which are not numerous (probably from fifteen to twenty) ; pores few 

 and large. Ilydrospires unknown ; spiracles small, heart-shaped, placed close around 

 the mouth, which is also small. Column unknown. Ornament <>f fine microscopic 

 lines parallel to the outline of the plates. 



UnnarJis. P. Eifelensis was original!) described by Prof Roemer as an example of 



