82 SAN DIEGO SOCIETY OF NATURAL HISTORY 
RAYMOND (Percy E)—Continued 
; 
species of this family show distinct traces of facial sutures, particularly of the part 
behind the eyes. He gives a figure of the head of a young species of Elliptocephala 
asaphoides Emmons. 
In regard to the placing of Calymmenidae, Dr. Raymond follows that of Beecher 
and places it in the Order Proparia, because the post ocular portion of the facial 
sutures cut the genal angles in Pharostoma and the genal spines are borne by the 
fixed cheeks. The free cheeks are decidedly Proparian. 
and Barton (Donald C.) A revision of American species of 
Ceraurus. 
Bull. Mus. Comp. Zoology, vol. LIV, No. 20, 1913. 
The authors state that the genus Ceraurus was proposed in 1832 by Green, for a 
new Trilobite which he describes as Ceraurus pleurexanthemus, and refer to Green’s 
Monograph, 1832, p. 83. 
The original description of this genus was first published in The Monthly Journal 
of Geology, June, 1832, p. 560, fig. 10, republished in the monograph. 
Although the authors do not quote Corda, they take Reed’s classification of Cheirurus 
into two groups on the form of the pygidae. The first with cyrtometopian pygidium 
like Ceraurus Green. The second like Cheirurus insignis type of pygidium with 3 
pairs of subequal pleural spines and a short median spine. 
The American species they class as follows: 
Ceraturus bispinosus sp. nov. 
Glabella or occipital segment strongly spinose with a pair of short, horn-like spines 
on the crest of the frontal lobe. 
Ceraurus numitor Billings. A single medium spine on the neck segment. 
Ceraurus mismeri Foerste. Glabella expanding rapidly forward. Genal angles with 
spines. 
Ceraurus hudosoni Raymond. Glabella expanding forward; eyes more than one- 
half the length of the head; a small form glabella expansion 1 in 4. 
Ceraurus pleurexanthemus Green. A medium-sized glabella expansion 1 in 7. 
2. Ceraurus milleranus M. & G. Eyes one-half the length of the head from the 
posterior margin. 
3. Ceraurus dentatus n. sp. Eyes less than one-half the length of the head from the 
posterior margin. 
Ceraurus granulosus sp. nov. Glabella with parallel sides. 
The authors note in the Trenton fossils of Ceraurus pleurexanthemus Green, from 
the typical locality, that the pygidium varies on the posterior border with either 
aspinose and rounded border or with 2, + or 5 short spines or denticles. 
The Ceraurus dentatus sp. nov. 
The authors refer to Hall’s C. pleurexanthemus, Pal. N. Y., vol. 1, p. 1847, pl. 65, figs. 
1d, th, 1i, and pl. 66, figs. la-1¢. ; 
The Ceraurus granulosus sp. nov. is the C. pompilius Raymond, 7th Report, Geol. 
Vermont. 
The Ceraurus Milleranus M. & G. is the Calymmene bucklandi, Anthony, 1839. (1 
would suggest the older name.) 
The authors refer Ceraurus rarus Walcott to Excrinurus Ceraurus pustulosa Hall to 
Eoharpes. 
To conform with the authors’ reclassification, the authors remark that besides the 
species noted, that Vogdes’ Catalogue, made in the year 1893, contains a number of 
other species, which do not belong to the genus as now restricted, as follows: 
Cheirurus apollo Billings, to the genus Anacheirurus. Cheirurus glaucus, C. satyrus 
and C. perforator Billings, belong to Nieszkowskia (Schmidt subgenus of 1881). 
—~ 
