180 BRITISH PALEOZOIC SPONGES. 



61. Pal^eacis cdneata, Meek and Worthen sp. 



1860. Proc. Acad. Nat. Sciences Philadelphia, p. 448. 



Examples of this species have been discovered in the Carboniferous Limestone 

 near Henbury, Bristol (' Geol. Mag.,' 1876, dec. ii, vol. iii, p. 267). The 

 original form was referred to the Petrospongice ; in Bigsby's ' Thesaurus Devonico- 

 Carboniferus,' p. 201, it is placed with the Amorphozoa under the name of Spheno- 

 poterium cuneatum. The nature of the fossil is doubtful ; it appears to me to be 

 rather related to corals than to Sponges. 



62. Protospongia diffusa, Salter. 



1873. Cat. Cambrian and Silur. Poss. Cambridge, p. 3. 



This species is based on a few scattered, rod-like, rusty markings on the surface 

 of a fragment of black shale of Menevian age from St. David's, South Wales. It 

 is doubtful whether the markings represent Sponge-spicules. The original speci- 

 men is in the Woodwardian Museum at Cambridge. 



63. Protospongia ? flabella, Hicks. 



64. — ? major, Hicks. 



1871. Quart. Journ. Geol. Soc, vol. xxvii, p. 401, pi. xvi, figs. 14—19. 



The typical examples of these species, now in the Woodwardian Museum at 

 Cambridge, consist of slightly raised, sub-parallel, straight or curved lines, which 

 are sometimes crossed by other lines at varying angles. No structure whatever is 

 preserved. The character of these markings is doubtful, and they are too indefi- 

 nite to be regarded as portions of Sponge-structure. They occur in the Harlech 

 Grits, near St. David's, South Wales. 



65. Protospongia Lddensb[is], Holl. 



66. — macul^formis, Holl. 



1872. Geological Magazine, vol. ix, p. 350. 



These two species were described by the late Dr. Holl in a foot-note to his 

 paper on " Fossil Sponges," but the specimens were not figured. They were from 



