RAYMOND: some new ORDOVICIAN TBIL0BITE8. 291 



This Specimen indicates a short and Wide cephaion which was evenly 

 arched and rather con\c\ for the genilS. The glabella is merged com- 

 pletely into the general surface, and both dorsal and glabellar furrows 



are completely absent. The facial sutures turn far outward in front 

 of the eyes, so that this portion of the cranidium is wider than in any 

 other species of the genus. The palpebral lobes are large, indicating 

 very large eyes, and are situated a little more than their own length 

 in front of the posterior margin, hut not quite twice their length from 

 the anterior edge. The surface, so far as can be determined from a 

 largely exfoliated specimen, is smooth. 



This species differs from any previously described, in having larger 

 eyes and in the greater width of the portion of the cranidium in front 

 of them. 



Measurements: — Length of cranidium, about 32 mm., width at palpebral 

 lobes, 32 mm. Length of palpebral lobe, 8 mm., distance from back of palpe- 

 bral lobe to posterior margin, 11 mm. 



The single specimen was collected by Professor Dunbar from a 

 pebble in the Cow Head conglomerate on Stearing Island, Newfound- 

 land, and is in the Yale University Museum. 



HOMOTELUS GRATIOSUS, Sp. nOV. 



Asaphus (Isotelus) susae Whiteaves (non Whitfield), Palaeozoic foss. Canada, 



1897, 3, pt. 3, p. 231. 

 Onchometopus susae Raymond, Proc. and trans. Roy. soc. Canada, 1912, 



ser. 3, 5, sect. 4, p. 118, pi. 2, fig. 1, 2. 



Cephaion nearly semicircular, evenly convex, with large, elevated eyes. 

 Cranidium absent from the type, but on other specimens depressed, smooth, 

 glabella not outlined. Fixed cheeks smooth, genal angles rounded. Eyes 

 large, near the middle of the cephaion. 



The axial lobe of the thorax is wide for an Homotelus, being nearly one half 

 the total width. 



Pygidium short and wide, nearly semicircular, with the axial lobe outlined 

 at the anterior end only. 



MEASUREMENTS: — Length of cephaion, 25 mm., width, 51 mm., the eye is 

 10 mm. long. Total width of thorax at middle, 48 mm., width of axial lobe, 

 23 mm. Length of pygidium, 26 mm., width 46 mm. 



This species differs from Homotelus florencevillensis, which occurs 

 at the same horizon, in having the eyes much farther forward and 



