3.'>S AxxALS OF iHE Caknkoii-: Muskum. 



DkSCRII'TKiX. 



Ceijhalon very strongly convex, the highest point at the neck 

 segment, (jlabella moderately convex and smooth. Its greatest 

 width is between the eyes and it tapers a little both backward and 

 forward. In front it becomes gradually less convex, sloping easily 

 down to the cheeks. Glabella entirely smooth, without furrows. 

 Neck segment wide on glabella, but narrower at the sides. Eyes 

 broken, but the eye lobes show them to be large, lunate, and Asapliiis 

 like. In front of each is a shallow groove extending to the glabella. 



Free cheeks large, extended into short, blunt spines posteriorly. 

 Around the whole margin of the cephalon is a narrow, concave 

 border. The following measurements are taken from the two speci- 

 mens. The cephalon : length, 15.5 mm.; width, 14.5 mm.; length 

 glabella, 8 mm.; width glabella, 4.5 mm. The cranidium : length, 8 

 mm.; length glabella, 5.5 mm.; width glabella, 3 mm. 



'I'he nearest relative of this species is Bathyurelliis fflrmosiis Billings 

 which was described from Division P, Cow Head, Newfoundland. 

 Bafhyiircllus brevispiiius differs from that species principally in the 

 length of the genal spines and in the convexity of the glabella. In 

 our species the glabella is depressed in front, but in the Newfoundland 

 form it is strongly convex. 



Locality. — Found in the pure dolomite layers in the reef three 

 miles southeast of Chazy, New York, near the Lake Champlain shore. 

 Both of the figured specimens are in the writer's collection. 



Bathyurellus minor sp. nov. (Plate 10, figure 16.) 



Batliym-illtis validiii Raymond, IJulletin American Paleontology, \'oliime III, No. 

 14, faunal list, page 301. 



In the trilobite layers at Sloop Bay, on Valcour Island, and in some 

 layers of the Crown Point section, small pygidia of a species of Bathy- 

 urellus are quite common. The specimens are fairly uniform in size 

 and are all too small to belong to the species just described. No 

 cei)halons have been found associated with them, but as these pygidia 

 are not at all unconmion in the localities mentioned, the cephalons 

 will probably be found in time. 



DnscRiPriox. 

 Cephalon and thorax unknown. 

 Py^i:;iiliiiin. — Outline almost semicircular. Axis convex, showing 



