i hi th<^ (renux Aiiij>i/.r. — ]o(j</e><. J 01 
for the type of the species. On comparing Angelin's illustrations of 
Ampyx costatus given on plate 40, fig. 1, we observe that they resemble 
Sars's figure given on pi. 8, fig. 4b, Isis, 1835 ; as to having a x^roduced 
glabella and spine, Sars' figures given on pi. 8, fig. 4a represent a 
species with a blunt glabella terminating in a tubercle ; fig. 4b of the 
same plate has an extended glabella prolonged into a spine. Both 
these species do not appear to be the same, therefore .Xngelin's des- 
cription of Ainpii.r ro-^fatas should be confined to liars' fig. 4b, and 
Ampyx maiHiniUatiis should be restricted to Sars' figures of this species 
given on pi. 8, figs. 4a-c. These illustrations do not quite coincide, 
but they agree much better than fig. 4b. That both Boeck and Angelin 
were correct in splitting up Ampyx uinniiiiiUatuf: Sars, there can be no 
doubt; it is a question of the correct separation. Ampyx costatus 
should not include the spined and non-spined glabella represented on 
Sars' pi. 8, figs. 4a-b. as Angelin, as reclassified it. 
Angelin also describes and figures the following sjiecies : 
Ampyx foiynhitiis Xng., Kegiones D-E ; Auipiix uuiiinniUaln>i Sars, 
Reg. Da; Ampyx nas'i.tits Dalm., Reg. C ; .liii)>;/i/ aruleatux Ang., Reg. 
Da; RaphiophoriiH setirostris Aug., Reg. Da ; IL tiiniiiliin Ang., Reg. Da; 
R. culminatus Ang., Reg. Da ; R. depresm Ang. Reg. Da ; R. scanicus Ang.^ 
Reg. Da; Lnnchndnmas i-nxtrafus. Sars., Reg. Da; L. ci-Ksxirnxtri.s Ang., 
Reg.Da ; />. <i(ji„;.-< .\.ng., lleg. Da : L./nijntiis Ang., Reg. ; L. (hnnuiitx Aug., 
Reg. B-C ; Aiiii>yx trfrnyntnis Aug., Reg. C, and .1. r>irliiati's Aug., Reg. 
1852. — Barrande in his great work Syst. Sil. Bohcme, vol. i, p. 632, 
describes and figures Ampyx ronxalti. He also redescriljes Ampyx 
pnrtlocki which is illustrated for tli(> first time. 
1857.— Eichwald in the Bull. Soc. Xat. Mosc. 1857. j). 318, describes 
Ampyx nasiKiis Dalm., Lonchodomn.^ ajlhiis Aug., and Raphioplioni:s 
comdns n. sp. These species are redescribed in Lctha-a Rossica vol. i, p. 
377. Lonchodnmiu afjinls is classed under the new name of L.loiKjIroiitris 
pi. 55, fig. 1, and Raphiophorus comihix is for the first time illustrated. 
1866. — Salter describes and figures . I mpyx prwnantim from tlie Upper 
Tremadoc in IMem. Geol. Sur. of (rreat Britian, Geol. of North Wales, 
p. 321, pi. 8, fig. 5. 
1872— Barrandp, ill lli.- Suppl. Syst. Sil. Hohr-me, vol. i, p. 4S. plate 
2, describes and figures Ampyx ynitn^ and J. tendlas. Etage D-o. 
1865.— Billings, in his work on the Paheozoic Fossils of Canada, vol. r, 
describes and figures Ampyx Indli, A. hfrinscuhis, A. noriii'dls, A. rnti- 
Uus, and .1. sonicoxtntnx.nW T>ower Silurian species. 
1875. — Ilicks, in the (^uart. .lour. Geol. Soc, London, vol. .\\.\i, p. 
182, plate in, fig. 7-8, describes and figures a LowfM- Silurian species 
under the name of Ampyx xattn-i. 
1878. — riaupt, in Die Fauna Grapt. Gesteines, p. 73, plate 5, fig. 7, 
describes Ampyx/ (br)'rinasiifii.t). /'nplnuphnriis riilniiiHitn^ Aug., 
Ampyx sp. 
1879.— Nicliolsnii^- Ktheridge, .Moii.Sil. Fossils of Gir\ an District, de- 
scribe and illustrate . I mpyx{ryonrhodumiis) ro.sfratii.t Sars, Ampyx{LoH(h) 
macaUamI Salter, Ampyx? maccono'dilei K. it X., Ampi/r hnrn,'i K. ^t X. 
