﻿HOMALONOTUS. 



113 



Homalonotus Vulcani. Murchison. 



Siluria, 2nd edition, pi. ii, figs. 3, 4, 1859. (Asaphus of the original work.) 



(The description and figures will appear in the appendix.) 



Locality. — Llandeilo flags, Corndon mountain, Shelve, Shropshire. 



Section — Trimerus, Green. 



Homalonotus delphinocephalus, Gree?/. PI. XI, figs. 1 — 11. 



Asaphus cornigerus, Brongniart. Crustaces Fose., pi. iv, fig. 10 (from a drawing 



of a Dudley specimen) not of pi. ii, fig. 1, 1822. 

 Trimerus delphinocephalus, Green. Monog. Tril. N. America, pi. i, fig. 1 ; model 



No. 32, 1832. 



Brongniartia platycephala, Eaton. Geol. Text-book, pi. ii, 1832 (fide Hall). 

 Homalonotus delphinocephalus, Murchison. Sil. Syst., pi. lxxvi bis, figs. 1, 2, 1837. 



— — Murchison. Siluria, 2nd ed., p. 123, Foss. 16, 1859. 



— — Milne-Edwards. Crust., iii, 314, 1840. 



— — Hall. Geol. Report, N. York, 1843. Palaeont. 



N. York, vol. ii, pi. lxviii, figs. 1—14 ; 1852. 



— — Emmrich. Dissert. 41-7, 1839. Neues Jahrbucb. 



1845. 



— — Goldfuss. Syst. Uebersichfc Tril. ; Neues Jahrb., 



p. 559, 1843. 



— — Bronn. Letbsea Geognostica, 1, 112, tab. ix, fig. 5. 



— giganteus, Castelnau. Essai Syst. Sil., p. 20, pi. iii, fig. 1, 1843. 



(Also HI. Atlas and H. Herculaneus, ib., p. 20. All 

 from Lockport, N. York.) 



R. 6-uncialis, depresso-convexus, alutaceus fere scaler, capite cauddque csqualibus acutis, 

 hdc acuminata, illo triangidato. Glabella undulata punctata, vix lobata, antice truncata, 

 bis quam fronte angulato piano longior. Genes declives angustcs, margine vix distincto, 

 angiitis obtusis. Oculi convexi, prce medio genarum positi. Thorax haud lobafns. 

 Cauda brevis trigona, convexissima, acuminata ; axe haud distincto, per totam caudam 

 extenso per-annulato, annulis 10 — 11 ; lateribus declivibus 8 — 9-sulcatis, sulcis obscuris. 



It is a curious synonym we have to head the above list withal. Mr. Charles Stokes 

 was very liberal in communicating English specimens and drawings to Brongniart, whose 

 artist has in this case faithfully copied the course of the facial suture, and enabled us to 

 recognise the species. The reference by Brongniart is evidently an inadvertence ; at 

 least, the species has no resemblance to the Russian Asaphus cornigerus, figured correctly 

 in his plate ii. Brongniart made other mistakes with his English materials. 

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