RAYMOND: NOTES ON THE ONTOGENY OF PARADOXIDES. 24] 
Only a few forms are known from southern Europe (Spain, France, 
Sardinia). P. asper Bornemann is founded on fragments and its right 
to be called a Paradoxides is queried by Pompeckj. P. mediterraneus 
Pompeckj is very similar to P. rugulosws,— was so identified by Ber- 
geron,— and the cephalon is therefore similar to that of P. hayward. 
P. barrandei Barrois has the whole four pairs of glabellar furrows and 
the glabella touches the marginal rim, but P. prodoanus de Verneuil 
and Barrande, which is very similar, has a narrow furrow between 
the glabella and rim, but the eyes are very close to the glabella, their 
anterior ends touch it, and the posterior ends also curve in unusually 
close to the glabella. 
It appears then that P. haywardi is most closely allied to P. etemini- 
cus Matthew of the St. John area in New Brunswick, P. intermedius 
Cobbold from Comley in Stropshire, England, and P. rugulosus Hawle 
and Corda, and P. mediterraneus Pompeckj of central and southern 
Europe. These four species, so far as they are known, all seem to be- 
long to the P. rugulosus group in which the eye lobes are very long, 
the glabella is separated from the marginal rim by a furrow (P. ete- 
manicus has a very narrow furrow) and have a rather long pygidium, 
the posterior margin of which is straight or concave in outline (the 
pygidium of P. intermedius is an exception). The eyes of P. haywardi 
are not of the P. rugulosus type, nor is the short wide pygidium. It 
may be noted, however, that the pygidium is not very different from 
that of P. intermedius Cobbold, to which P. ia seems on the 
whole to be most closely allied. 
