1889. J PROCEEDINGS OF THE NATIONAL MUSEUM. 45 



Zacanthoides eatoni sp. uov. 



This species differs from Zacanthoides levin iu having the glabella 

 clavate instead of subcyliudrical ; also in tbe more elongate form of 

 the head. Pygidium unknown. 



Formation of locality. — Upper portion of the Oleuellus zone in 

 Washington County, New York. 



Nat. Mus. Cat. Iuvt. Foss., No. 18362. 



Solenopleura harveyi sp. uov. 



Of this species only the central portions of the head have been 

 found. These belonged to a very large species, as the heads vary in 

 length from 40 nmi to 45 mm . 



The glabella is conical, about twice as long as the width, and sepa- 

 rated from the slightly rounded occipital ring by a shallow furrow. 

 Two very shallow furrows extend obliquely backward from the dorsal 

 furrow on each side ; they scarcely indent the smooth, convex surface 

 of the glabella ; an anterior pair of furrows are indicated by a short, 

 shallow depression on a line with the anterior margin of the eye lobe ; 

 the glabella is separated from the fixed cheek and frontal limb by a 

 shallow groove on the sides, and in front by the difference in the slope 

 of its surface and that of the frontal limb. Frontal limb broad and 

 gently convex down to the slight depression separating it from the rel- 

 atively broad, depressed margins ; laterally it passes into the broad, 

 smooth, free cheeks. The frontal margin of the eye lobe is at about 

 half-way between the posterior and anterior margins of the head ; it is 

 of medium size; a well-defined ocular ridge extends obliquely back- 

 ward across the fixed cheek from the glabella to the eye lobe. The 

 posterior margin of the head is separated from the main part of the 

 fixed cheek by a broad, shallow groove. 



With the material at hand for study the species is provisionally re- 

 ferred to Solenopleura. 



The specific name is given in honor of Eev. M. Harvey, the author 

 of the best work yet published on Newfoundland, and the enthusiastic 

 helper of every scientific studeut who visits the colony. 



Formation and locality. — Lower Cambrian. About 600 meters 

 north of Manuel's Brook, Conception Bay, Newfoundland. 



Nat. Mus. Cat. Iuvt. Foss., No. 18338. 



Solenopleura howleyi sp. uov. 



A second large species is referred to Solenopleura. It is associated 

 with S. harveyi, and is much nearer the type of the genus Solenopleura 

 than the latter species. It is known only by the central portion of the 

 head and a few segments of the thorax. 



The glabella is elongate, conical, convex, and marked by three pairs 

 of shallow furrows that penetrate obliquely backward one third the 

 distance across the glabella ; occipital ring rounded aud well detiued 



