CATALOG OF FOSSIL FISHES IN THE CARNEGIE MUSEUM 387 
These are cataloged as Nos. 4500 (young example, imperfect), 4312 (small but 
complete), 4546 (total length 70 cm., of which the head, from base of occiput to 
the extremity of rostrum measures 30 cm.), and 4520 (in counterpart, total length 
60 cm.). 
In addition to the four specimens just mentioned, the head in natural associ- 
ation with a few anterior vertebre and fin-portions of an enormous example of 
Blochius, occurs in the Bayet Collection, and is to be seen on exhibition in the 
Hall of Fossil Vertebrates in the Museum. Notwithstanding its imperfect con- 
dition, the form and proportion of the preserved parts are such as to leave little 
doubt that the huge head in question pertains to a distinct species, the description 
of which immediately follows. 
58. Blochius moorheadi, sp.nov. (Text figure 5.) 
Type.—Nearly complete head in natural association with anterior vertebrae 
and portions of the pectoral fins; Carnegie Museum. 
A relatively gigantic species, estimated to have attained a total length of 
between 2.5 and 3 metres, thus greatly exceeding the average size of individuals 
belonging to the type species. Further noteworthy differences are to be seen in 
the general configuration and relative proportions of the head parts, especially in 
the gently sloping outline of the cranial roof, depressed form of the head posteriorly, 
and consequent shortening of the opercular apparatus. The abrupt downward 
slope of the facial region in advance of the orbits, which is so marked a feature in 
B. longirostris is here missing, and the orbit itself appears to be more posteriorly 
situated than in the type species. The vertebra are of the usual hour-glass form, 
and larger than those of Cybiwm or other known contemporaries among bony fishes. 
Fig. 5. Blochius moorheadi, sp. nov. Anterior portion of type specimen, preserved in the Carnegie Museum. 
Selerotic ring partially preserved; pectoral fin-rays displaced. Greatly reduced. 
Fig. 5a. Blochius longirostris Volta. Complete head and anterior portion of the trunk, showing much-elon- 
gated rostrum and form of opercular plates. (After A.S. Woodward.) 1/10. 
Owing to the crushed condition of the cheek-plates and opercular apparatus, 
a restoration of these parts has not been attempted in the annexed diagram, but 
