30 
MUSEUM BULLETIN No. 31. 
the reproduction was unsatisfactory, and is, therefore, reprinted. The 
specimen is of interest, not only because it is the type, but because 
it illustrates the ready separation of the upper and lower layers of 
the fringe. A considerable number of localities for this species are 
now known, but welhpreserved specimens remain rare, and the writer 
has seen none equal to the type, which was in the collection of Sir 
James Grant, and was presented by him to the Victoria Memorial 
Museum. It was found in the upper part of the middle Trenton at 
Ottawa, Ont. 
Eoharpes dentoni (Billings). 
Plate IS, figure 6. 
Sarpes dentom Billings, 1863. Oan. Nat. and Geol., vol. VIII, p. 36, 
fig., 1865. Pal. Foss., Oan. yol, I, p. 183, fig. 166. Raymond, 
Bull. Vic. Mem. Mus. I, 1913, p. 33, Pl. III, fig. 5. 
This species was described by Billings from an incomplete crani- 
dium. There is, however, in the collection, a complete but rather 
poorly-preserved specimen of the same species collected by A. R. 0. 
Selwyn, in 1880. This ie the only entire American Sarpes of which 
the writer has knowledge. 
There do not appear to be more than about eighteen segments in 
the thorax, and possibly only sixteen, but the specimen is rather 
obscure in this region, and it is not possible to tell where the pygidium 
begins. The genal spines are narrow, and so long ae to extend 
slightly beyond the pygidium. They are much longer and the brim 
is narrower than in Eoharpes otiawaensis (see Plate IX, figure 1). 
In front of the glabella, the brim of E. de^mtoni ia narrow, deeply 
concave, and the anterior rim is curved upward, whereas in E. otta- 
waensis the brim at the front is wide and nearly flat. The pair of 
furrows in front of the posterior oblique pair on the glabella are 
much stronger in both species than is indicated in the original figures. 
A second specimen of this species, found on a tablet, labelled 
Dalmanites bebryx, shows the pygidium and some of the thoracic 
segments, but here, too, it ie impossible to say how much is pygidium. 
Barrande states that there are three or four segments in the pygidium 
of Harpee, and this fragment exhibits fifteen segments in all. It is 
from a much larger individual than the one collected by Selwyn, and 
evidently when complete had more segments. The genal spines 
extend beyond the pygidium. 
Locality. Ottawa, Ont. Label reads u Ottawa river,” and is, 
therefore, presumably from the “ Cyatid zone ” (upper part of middle 
Trenton). 
