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 filograna of Linneeus. 
FinoGRANA (?) PermMriana, King. 
Srrputa or Dentarium (?), Sedgwick. Trans. Geol. Soc. Lond., 2d series, vol. i, 
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 affixus. Apertura rotunda; 
margine dente unico vel dentibus duobus tribusve seepe armata.’”2 
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, King. Plate VI, fig. 15. 
SERPULA OBSCURA, King. Catalogue, p. 6, 1848. 
— MINUTISSIMA, Howse. T. N. F. C., vol. 1, p. 258, 1848. 
Diagnosis.—Semicylindrical, tortuous, very small. d/outh inclined. 
This small species is occasionally found attached to Henestella retiformis, Cyathocrinus 
ramosus (as in the cup under figure 15, in Plate VI), Productus horridus, Camerophoria 
1 Trans. Geol. Soc. Lond., 2d series, vol. iii, p. 118. 
2 Anim. s. Vertéb., edit. nouv., tom. v, p. 632. 
