8 PORIFERA. 
Ischadites keenigi, Murchison, J. W. Salter, Cat. (1873), p. 100. 
G. J. Hinde, Q. J. G. S. xu (1884), p. 801, and Brit. Foss. 
Sponges (1881), pl. 1, f. 1, p. 120. Wenlock Limestone ; Dudley. 
Fletcher Collection. 
I.? macropora, see under Incertee sedis. 
Jerea pastinacea, F. McCoy, A. M. N. H. ser. 2, 1 (1848), 
p. 398, and Contrib. Brit. Pal. (1854), p. 45. Upper Green- 
sand; Vale of Pewsey, Wiltshire. This specimen cannot be 
identified with certainty. . 
J. websteri (Sowerby ?). Siphonia websteri, W. J. Sollas, Q. J. G. 
S. xxxur (1877), pl. xxv, f. 7,7 a, p. 806. Gault ; Folkestone. 
Manon foltaceum, F. McCoy, A. M. N. H. ser. 2, 1m (1848), 
p- 399, and Contrib, Brit. Pal. (1854), p. 46. Chalk; probably 
Flamborough. (Not from the Coralline Oolite of Malton as 
stated by McCoy.) 
M. reussi, v. Verruculina reussi. 
Ophrystoma ocellatum [Seeley MS. sp.], G. J. Hinde, Cat. Foss. 
Sponges, Brit. Mus. (1883), p. 126. Porospongia, O. Fisher, 
Q. J. G. S. xxrx (18783), pl. vi, f 1. Ventriculites cavatus, 
Smith, W. J. Sollas, cbed. (1873), p. 68. Cambridge Greensand ; 
Cambridge. 
Pachytilodia sp., W. Keeping, Foss. Upware and Brickhill (1883), 
pl. vin, f. 6, p. 149. Lower Greensand ; Upware. 
Pharetrospongia strahani, W. J. Sollas, Q. J. G. S. xxx 
(1877), pl. xi, p. 242. Cambridge Greensand ; Cambridge. 
Plocoscyphia laxa, I. McCoy, A. M. N. H. ser. 2, m1 (1848), 
p- 397, and Contrib. Brit. Pal. (1854), p. 45. Upper Greensand ; 
Lyme Regis. 
P. pertusa, Geinitz, W. Keeping, Foss. Upware and Brickhill 
(1883), pl. viii, f, 1 a, b, p. 145. Lower Greensand ; Brickhill. 
Protospongia diffusa, J. W. Salter, Rep. Brit. Assoc. (1865), 
p- 285, and Cat. (1873), p. 3. G. J. Hinde, Brit. Foss. Sponges 
(1888), p. 180. Menevian Group; Pen-pleidau, St Davids. 
P. fenestrata, v. Protospongia hicksi. 
