56 PERMIAN FOSSILS. 



A fancied similarity between this fossil and the next to be noticed has principally led 

 me into the present subject-matter. The Rev. Mr. Berkeley founded the genus on the 

 Serpula jilograna of Linnaeus. 



FiLOGRANA (?) Permiana, King. 



Sekpula or Dentalium (?), Sedgwick. Trans. Geol. Soc. Lond., 2d series, vol. iii, 



p. 118, 1829. 



Diagnosis. — Tubes cylindrical, acicular, slightly tapering. 



The fossils referred to the above-noticed " Serpula or Dentalium' are exceedingly 

 obscure. The weathered surface of some of the beds at the south end of Black Hall 

 Rocks often exhibit them confusedly crowded together, in the state of flattened casts, and 

 seldom more than an inch in length ; they appear to be merely fragments. When the 

 Rock is broken, cross sections of the fossil are obtained, showing it to be quite cylindrical 

 in form. 



The exact locality which yielded this fossil to Professor Sedgwick, and where I 

 have also collected it, is the south end of Black Hall Rocks, on the Durham coast, 

 about five miles north of Hartlepool. A similar production is stated to occur " in the 

 upper beds at Cold Hill, near Aberford."^ (Sedgwick.) A doubtful fossil, hesitatingly 

 referred to the same species, occurs in a quarry of (? Rauchwacke) Limestone, near 

 Cleadon. 



Genus Vermilia, Lamarck. 



Diagnosis. — "Tubus testaceus, cylindraceus, postice sensim attenuatus, plus 

 minusve contortus, repens, corporibus marinis latere aflixus. Apertura rotunda ; 

 margine dente unico vel dentibus duobus tribusve Scjepe armata."- 



While Serpula, a closely-related genus, is attached only by a portion of its tube, 

 Vermilia is adherent by its entire length. 



Type, V. rostrata. 



Vermilia obscura, Kitig. Plate VI, fig. 15. 



Serpula obscura, King. Catalogue, p. 6, 1848. 



— minutissima, Howse. T. N. F. C, vol. i, p. 2.58, 184S. 



Diagnosis. — Semicylindrical, tortuous, very small. Mouth inclined. 

 This small species is occasionally found attached to Fenestella retiformis, Cyathocrinus 

 ramosus (as in the cup under figure 15, in Plate VI), Productus horridus, Camerophoria 



^ Trans. Geol. Soc. Lond., 2d series, vol. iii, p. 118. 

 - Anim. s. Verteb,, edit, nouv., torn, v, p, 632. 



