92 R. R. GURLEY 
DESCRIPTION OF FIGURES. 
PLATE IV. 
Fic. 1.—Tetragrapsus acanthonotus; nat. size, and (1a) X 2. 
Fic. 2.—Caryocaris oblongus, X 2. Showing conjoined lateral appendages. 
Fic. 3.—Caryocaris curvilatus, X 2. Showing conjoined lateral appendages. 
Fic. 4.—Proximal “disk” of Climacograptus phyllophorus; narrow form, X 2. 
Fic. 5.—Climacograptus phyllophorus, X 2. Showing “disk,” and distal exten- 
sion from it of the virgula terminating in the “ polypary.” 
Fic. 6.—Chimacograplus phyllophorus, XX 2. 
AGRE Vie 
Fic. 1.—Caryocaris wrightit Salter, X 2. Showing proximal portion, one median 
and two lateral appendages, 
Fic. 2.—Caryocaris wrightit, < 2. Showing the lateral appendages, with the 
interrupted external, and the ciliated superior borders. 
Fic. 3.—Caryocaris curvilatus, nat. size. Showing the outline, marginal fila- 
ments and ciliated superior border. 
Fic. 4.—Dawsonta monodon, X $. 
Fic. 5.—Dawsonia tridens, < 3. Showing the dentated border. 
Fic. 6.—Phycograptus brachymera, X 6. 
Fic. 7.—Didymograpsus bipunctatus, X 3. Fig. 7a, enlargement of thecz, X 6. 
Fic. 8.—Didymograpsus convexus, X 3. 
LIST OF GRAPTOLITES KNOWN FROM AMERICAN STRATA. 
After some thought, I have concluded that I cannot do 
better than to connect this list with that given in our standard 
catalogue (Miller’s North American Geology and Paleontology ; 
and Supplement) as a base line. For this purpose the two lists 
(Miller’s and mine) are given in parallel columns. Italicized 
genera and species are new additions to Miller’s list, most of them, 
of course, being subsequent publications. 
Acanthograptus Spencer, 1878. Acanthograpsus Spencer, 1878. 
granti Spencer, 1878. granti Spencer, 1878. 
pulcher Spencer, 1884. pulcher Spencer, 1884. 
Amphigraptus Lapworth, 1873.* 
Type A. divergens. 
divergens (Hall), 1859. 
Azygograptus Nicholson, 1875. 
? walcotti Lapworth, sp. nov. 
Bryograptus Lapworth, 1880. 
lentus Matthew, 1895. 
