602 T'ransactions.—G'eology. 
EXPLANATION OF PLATE XXVIII. 
ALL FIGURES ARE OF NATURAL SIZE. 
Fig. 1.—Head seen in profile with inferior maxillary. 
Fig. 2.—Same, seen from above. 
Fig. 3.—Clavicl 
Fig. 4.—Shoulder blade 
Fig. 5.—Coracoi 
Fig. 8.—Metacarpus and phalange. 
Fig. 9.—Femur. 
Fig. 10.— Tibia and fibula. 
Fig. 11.— Tarso-metatarsus. 
Fig. 12.—Phalanges. 
Art. XCV.—On a new Trilobite (Homalonotus expansus). 
By James Hector, 
Plate XXVII., fig. 2, p. 474. 
[Read before the Wellington Philosophical Society, 9th December, 1876.) 
Homalonotus expansus, sp. nov. 
Distinguished from H. delphinocephalus, Green (Hall, ** Paleontology of 
New York," p. 309), and from H. harrisoni, McCoy, (‘ Pal. of Victoria," 
Pt. IIL), by its great proportionate width, and particularly by the middle 
lobe being only half the width of the lateral anas of the caudal portion of 
the buckler. 
From the Spirifier slates associated with Madripore limestone and quartz- 
ites on which the auriferous slates of Reefton rest unconformably. Probable 
age, upper silurian, being the upper part of the group of strata mapped as 
the ** Mount Arthur Series." 
Tail segments only ; width of largest specimen, 8 inches. 
