54 
are not of nuicli importance, though, as already pointed out, the Hawkeshury 
3Iyriolepis is most nearly related to the lower Liassic Thrissonotus. 
Dipnoans and Selachians, too, do not call for remark ; and the known 
distrilmtion of the really significant genera may he concisely arranged in 
tabular form, thus : — 
Table showing the Geological and Geogbaphical Distribution of the 
VAPHOus Geneha. 
Bunter. 
Musohclkalk. 
Keiijicr. 
L. Lias. 
“Trias.” 
Koto 
beds. 
Karoo 
beds. 
Hawkes- 
Imry 
bed.s. 
Germany. 
Germany. 
■ 
I’crlcdo. 
Englanil. 
Ciermany. 
Seetokl. 
Raibl. 
England 
and 
1 Germany. 
England. 
U.S.A. 
India. 
s. 
Africa. 
: N.S.W. 
, 
CA TOPTERIDjE. 
Catopterus 
Dictyopyge 
X 
X 
X 
X 
X 
BELONORII YNCIIID.E. 
Beloiiorhynchns 
X 
X 
X 
Saurichthys 
X 
X 
SEMIONOTIDzE. 
vSemionotus 
X 
X 
X 
Pristisomus 
X 
Dapedius 
X 
9 
X 
Cleithrolepis 
9 
X 
X 
Tetragonolepis 
X 
X 
LEPIDOTIDJE. 
Lepidotus 
X 
X 
X 
PIIOLIDOPIIORID.E. 
Pholidopliorus 
X 
X 
X 
X 
X 
X 
Ophiopsis 
X 
Ptvcholepis 
X 
X 
X 
PACIIYCORMID.E. 
Pachycornius 
X 
X 
LEPTOLEPIDjE. 
Leptolepis 
X 
Megalopterus 
X 
P YCNODONTID.E. 
Mesodon 
X 
Of tlie six HaAvkeshury genera comprised in this list, it Avill thus he 
observed that four are represented in the European Trias, two of these 
{Diatyopyge and Semionotus) being typically Triassic, another {Belono- 
rliynclms) commonly ranging to the Lias, and the fourth {FhoUdophortis) 
being best developed in this and later Jurassic deposits. The fifth genus 
(Fristisonms) is new, but scarcely higher in rank than Semionotus-, and 
Cleithrolepis has only been definitely recognized elsewhere in the Stormberg 
