Description of a Neiv Species of Trilobite. 273 



and were lullabyed by the hoarse roar of the waves and the creaking 

 of the ships cordage. About midnight, however, I awoke to find 

 myself rolling out of bed. Going on deck I saw that we were drag- 

 ging our anchor. I called the Captain who concluded to run out the 

 other anchor. We then turned in again and slept until day break. 

 Everything was again quiet and looking around we saw hundreds of 

 acres entirely bare of water. A glorious sight, for we were thus en- 

 able to collect many rare shells that could not be secured under any 

 other circumstances. Six miles from Sandy Key and in sight was the 

 mainland, Cape Sable. We ate a hurried breakfast and gathering up 

 our baskets disembarked and began work among the Pinnas, Fascio- 

 larias, and other wonderful things on the mud banks. It proved a 

 profitable day, as the loads of shells, each of us found, testify. The 

 list is too long for this paper, and so I must regretfully drop the sub- 

 ject. 



Descriptwn of a Neiv Sp)eeies of Trilobite. By C. D. Walcott, of 



Trenton Falls, N. Y. 



Genus Spherocoryphe — (AngeFm.) 

 Spherocoryphe robustus, n. sp. 



General form subovate, convex ; cephalic shield subtriangular, 

 strongly convex; anterior and lateral margins smooth, round edges; 

 posterior lateral angles produced into long subuliform spines ; jDosterior 

 margin nearly transverse ; glabella subglobose, constricted at the 

 base, projects beyond the anterior and lateral margins ; two minute 

 rudimentary lobes are separated from the anterior lobe by deep fur- 

 rows each side of the central axis ; neck furrows broad and shallow 

 upon the central axis, deepens laterally, and extends tothe posterior 

 lateral angles ; neck segment a narrow elevated ridge ; movable cheeks 

 triangular, convex. 



Eyes prominent, subglobose, directed forward and outward from 

 the central eminences of the cheeks ; visual surface occupies the outer 

 lateral margins ; facial sutures, as far as determined, extend from the 

 posterior third of the lateral margins to the posterior base of the eyes, 

 thence to the top of the eye, curve around the outer margin and then 

 down to the anterior base. 



Thorax a little longer than the cephalic shield ; axial lobe with ten 

 segments, arching forward, narrows very gradually, posteriorly as wide 



