172 CATALOGUE OP THE BLASTOIDEA. 



the Calcaire de Ferrones below, and in the Calcaire de Moniello above, the latter, in 

 his opinion, representing the Eifeler Kalk of Germany. The earliest known species, 

 however, is Pentremitidea Fraiponti from the Gres de Gahard (Taunusien) of Belgium. 



Mr. Wachsmuth's collection contains a specimen of P. Paillettei (PI. IV. figs. 9, 10) 

 which he had obtained from a dealer, who gave its locality as Charleston, Indiana. 

 He tells us, however, that none of the local collectors have ever met with a similar 

 one, and it is therefore very doubtful whether the species really does occur in 

 America at all l . We do not think it at all probable that this is the case, as we 

 know of no Blastoids which are common to both sides of the Atlantic. 



Type. Pentremites Pallettei, de Verneuil. 



Pentremitidea Paillettei, de Verneuil, sp. 

 (PI. IV. figs. 8-10; PI. XIV. fig. 13; PL XVII. fig. 11.) 



Pentremites Pailletti, de Vera. Bull. Soc. Geol. France, 1844, tome i. p. 213, t. 3. ff. 4, 5. 

 Pentremites Pailletti, d'Archiac& de Vera. ibid. 1845, torueii. p. 479, t. 15. ff. 10 a, b, 11 a, b. 

 Pentremitidea Paillettei, d'Orbigny, Prod. Pal. Strat. 1849, tome i. p. 102. 

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



p. 368, t. 7. f. \7a-c. 

 Pentremites Dutertrii, Roemer, ibid. p. 374. 



Pentatremites Paillettei, Bronn, Klassen und Ordn. Thier-Reichs, 1860, Bd. ii. t. 23. f. 2 a-c. 

 Pentremites Pailletti, Dujardin & Hupe, Hist. Nat. Zooph. Echinod. 1802, p. 97, t. 2. f. 13. 

 Pentremites Pailleti, Mallada, Bol. Com. Mapa Geol. Espana, 1875, tomo ii. p. 78, Ibid. 



1877, tomo iv. lam. 12. f. 5, 6. 

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



Sp. Char. Calyx clove-shaped, expanding gradually upwards ; base elongate and 

 pointed ; summit semitruncate, contracted towards the centre ; periphery quinque- 

 lobate. Basal plates very long, longer than the radials, forming a slender elongate 

 cup, the surface plane, and without a fold. Radial plates elongate, narrow, strongly 

 arched in the middle line from the lip downwards, but not carinate ; bodies occupying 

 by far the greater portions of the plates, the limbs being short and insignificant ; 

 sinuses short, wide, open, and with a low radial angle ; lips simple, not overhanging. 

 Deltoid plates often invisible externally 2 . Ambulacra short, scarcely petaloid, retain- 

 ing their width undiminished ; side plates fifteen, and perhaps more, on each side of an 

 ambulacrum [d'Archiac and de Verneuil say eighteen], transversely oblong; outer side 

 plates unknown. Spiracles very minute, elongated openings separated by the deltoid 

 ridge. Hydrospires eight on each side of an ambulacrum ; tubes long ; sacs pyriform. 

 Mouth very small. Anal spiiacle ovate-triangular, acutely pointed inwards. Orna- 



1 Ann. & Mag. Nat. Hist. 18S2, vol. ix. p. 223, and 1883, vol. xi. p. 226. 



3 We have not be< d able to make out tho radio-deltoid sutures at all distinctly in any of our specimens. 

 Hut Roemer aeema to have been more fortunate; and his figures show that they just appear externally, 

 while the anal deltoid is larger than its fellows as in Troostocrintu. 



