clviii INFERIOR OOLITE AMMONITES. 



Septicarinate. 

 LXIV. Genus — Pseudolioceras, S. BucJcman. 

 1889. Pseudolioceras, This Monogr., p. 81. 



Distinction. — From Lioceratoid genera, the septicarina ; from Harpoceras or 

 Vacelria, the radial line (Fig. 158, p. clxvii). 



Remarks. — As the type of the genus I take the species figured by Blake (York- 

 shire Lias, Plate viii, fig. 6) as Harpoceras compactile, and consider this example 

 to be the type of the species, since this is the first delineation. 



Correction. — The idea of this genus being the ancestor of Hyperlioceras must be 

 rejected. The two genera are really morphic equivalents, easily distinguishable, 

 however, by their radial lines, as well as by the greater persistence of costation in 

 Vsemlolioceras. 



1. Pseudolioceras gradatum, S. Bud-man. Plate XX, figs. 3, 4; Suppl., Fig. 159, 



p. clxvii. 



1889. Pseudolioceras compactile, This Monogr., PI. xx, figs. 3, 4 ; p. 85. 



Description. — (Iradumbilicate, costate ; and see p. 85. 



Remarks. — Must be separated from P. compactile on account of its grad- 

 umbilicus and its rectangular inner margin. See p. 86. 



Locality and Strata. — Gloucestershire : Coaley Wood, Bed 17, Section vi, p. 45. 

 North Nibley, Bed 28 or 30, Section vii, p. 46. 



Date <>( H.ristence. — Lilli hemera. 



2. Pseudolioceras Dumortieri, 8. Buchman. 



1874. Ammonites Lythensis, Dumortier (non Young & Bird), Bassin du Rhone, 



IV, PL xi, figs. 9, 10. 

 1889. Pseudolioceras compactile. This Monogr., p. 85 (pars). 



Description. — Perangustumbilicate, but gradumbilicate, inner margin rect- 

 angular ; costate ; periphery narrow, subtabulate. 



Distinction. — From P. gradatum, the smaller umbilicus, narrower periphery, 

 .slightly more compressed whorls. 



Remark*. — The largest specimen of this species is the size of the P. gradatum, 

 Plate XX, fig. 3. To obtain an idea of this species give to that view of P. gradatum 

 the umbilicus of Fig 1 . 5. 



