53 
Eristol ; another Tholidophoras is known from Germany^; and a sknll of 
Ccratudns was discovered in 1886 in tlie Pihietic of Austria." 
Tlie most prolilic of the tish-hearing’ horizons of the Lias is the 
well-known lower division of Lyme Ptegis, Dorsetshire, with its equivalents 
in other parts of England. Here, indeed, nearly all the principal Liassic 
genera are so well rc])rese]ited that reference need not he made to any 
corresponding I'auna elsewhere. In addition to several Selachians and 
Chimicroids, and one Sturgeon {Chondrostens), there are four genera and 
species of Pahconiscidie,^ at least one g(mus of Ccelacanthidie,'* and a single 
species of the remarkable Belouorlnjtwhus:' Semionotns is absent,*^ but 
J)apedius'‘ (including Lepridot I*hoUdop)horus,^'^ 
including Conodns,^’ Ueterolepidotus,^’ and Lissolepis,^^ and Fiychohpjis^’’ 
represent tlie early Lepidosteoids ; a species of Mesodoid'^ l)elougs to the 
Pycnodontida) ; Vachucormv.A~ points towards n. higlier type of lish organiza- 
tion ; and Lcplolepls'-^^ is the forerunner of fishes Avith completed A"crtel)ral 
centra. There are also other genera of more doubtful position, iiicluding 
'Flatysiagum}'^ JEndac/is,-^ Isocolinn,-^ Osfeorhacl/is,-- and IhupaciiraJ^'^ 
In comparing these Amrious faunas AAoth that of the IlaAvkesbury 
beds, it is obviously only necessary to make a selection of the leading types 
pertaining to the more specialized groups. Ccjelacanths being absent at 
Gosford, they may bo dismissed from consideration ; and tlie Pal;coniscid;c 
^ Pholidophorn^ /lormcri, K. Martin, Zeitsclir. doutsch. (Jeol. Ges., 1S74, A ol. xxvi pp. 810-81!), I’l. xxix, 
llgs. l,-2. 
- D. Stnr, A crh. k. k. Gcol. r.eichsanst. A\ ien, 1880, pp. 3S1-.388. 
^ Cciitrolrpis (is)i('r, Kgerton, Alem. Gcol. Surv. 18.")8. Dec. ix Xo. .A. CoxmolrpU Krjerloiii, Egerton, 
ihid., Dec. ix. No. 1. O.ipijnathus onriUis, Egerton, HikL, 1855, Dec. viii No. 0. Thfissonotus CoJet, Egerton, 
ibiil., Dec. ix. No. 2. 
^ Ilo/ophaf/Hs, Egerton, ibid., 1800, Dec. xii p. 20, PL vi ; .ami Ibh!., 1872, Dec. xiii l\o. 10. 
Belonosf.oinu.i acii/iis, L. Ag.rssiz, ‘‘Rccli. Poiss. Eoss.,” 1843, A’ol. ii. I’t. ii ]i. 142, PI. xlvii a, figs. .3, 4. 
J’robaLly identical with ikVo/io.s2om»‘; a L. Agassiz, fom. cil., Pt. ii, ]). 14.3 (name only), assigned to 
Jldonorhynchus by Smith AA^oodward, Ann. and Mag. Nat. Hist. [0] A'ol. i, p. 354. 
'' file so-callcd Semionotiis rhombifer, Agassiz, is Jlctevolcpidotux, Egerton {.Smith AVoodward, Ann. and 
Alag. Nat. Hist. [5] A"ol. xx, p. 178). 
’ L. Agassiz, torn. clf„ Pt. i, ji. 181. 
' L. Agassiz, torn, rif., Pt. i, p. 220. 
■' L. Agassiz, tom. cif., Pt. i, p. 233. 
E. Agassiz, tom. clt., Pt. i, p. 271. 
” I.. Agassiz, torn, cit., Pt. ii, p. 07. 
L. Agassiz, tom. cit., Pt. ii. p. 105 (name only). 
Egerton, Mem. Gcol. Surv. , 1872, Dec. xiii. Nos. 2, .3. 
.1. AA'^. Davis, Ann. and Mag. Nat. Hist. 1884, [5] A'ol. xiii pp. 448-453, PL xvi. 
L. Agassiz, tom. cif., Pt. ii, p. 107. 
Pi/cnodu-x lianxiciix, Egerton, toe. cit. 1855, Dec. viii, No. 10. Assigned to Jlcsodon by -J. .J. Ilcckel, 
Denkschr. math.-natnrw. t'l. k. Akad. AViss. Wien, 1850, A'ol. xi p. 202. 
L. Agassiz, tom. cit., Pt. ii, p. 110. 
L. Agassiz, tow. at., Pt, ii, )). 120. 
Egerton, toe. cit., 1872, Deo. xiii No. 0. 
Egerton, ibid, 1858, Ike. ix. No. 4. 
Egerton, ilrid, 1872, Dec. xiii No. 4. 
Egerton, ibirt, 1872, Dec. xiii No. 5. 
llarpaclcs, Egerton, Geol. Alag. 1870, [2] A'ol. hi p. 141. Thtrpactira, Egerton, ibid, p. 576. 
