with descriptions of new Fossils. 219 
the eye, nearly parallel with the axis of the body, until it reaches a point 
opposite the extremity of the furrow of the front margin, thence it 
it turns sud- 
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Locality.—This is the largest species of the genusI have seen. It 
occurs in coarsely crystalline limestone of the age of the Potsdam sand- 
Stone, at the head of Clear creek, Burnet county. 
Arionellus (Bathyurus) planus (n. sp.). 
moderately elevated, 
the giabellar furrow to 
about eight lines long); lateral lobes gently convex, segments 
dct. 
Collection, none of which show any traces of trans 
Length of head, 0-93; length of glabella, 0°54; W 
county, associated with Orthis Coloradoensis, near the top 0 
tion.—Texas State Collection. 
Conocephalites depressus (n. sp.). 
ost convex in the middle, equal to 
nt and just within the rim a distinct By auiliting ened Raab 
the specimens under exam- 
ination, peer 
Length of the head 0°42 of an inch; length of glabella 0-28; width 
of glabella at base 0°23, at apex 0°16. 
