128 SAN DIEGO SOCIETY OF NATURAL HISTORY 
WALCOTT (Charles D.)—Continued 
is a larger species than the genotype. .J. aster has a frontal boss much like the type. 
Acrocephalites multisegmentus has 25 thoracic segments. A. aoris, a species much like 
A. tutus; also A. glomeratus, a species like 4. ? majus. 
The author describes seven species under Lorenz’s genus Alokistocare, of which 4. 
althea, A.?labrosun, A. pomona and A. ticida are new. He refers Ptychoparia 2 
Linnarssoni and P. 2 prospectense to the genus, and includes a figure and description 
of the genotype Conocephilites subcornatus Hall and Whitfield, which he compares 
with the new species 4. althea. 
The author includes under the genus Lonchocephalus eight species, five of which are 
described as new: Lonchocephalus appalachia, L. bunus, L. pholus, L. plena, L. sospita. 
Describes and illustrates the genotype L. Chippeqwaensis Owen. Refers Shumard’s 
Conocephalites minor and C. minutus Bradley to the genus. 
Dr. Owen, plate 1-A, fig. 15, Geol. Sur. Wis., Iowa and Minnesota, 1852, p. 624, 
refers to Lonchocephalus ?.a pygidium with lateral spines, similar to Dzikelocephalus 
Towensis, which Walcott places as the genotype of Crepicephalus. 
The author remarks that Lonchocephalus is most nearly related to Liostracus An- 
gelin, with only the cranidium for comparison. The difference between them is in the 
frontal limb and rim, and the absence of well-defined glabella furrows in Liostracus. 
The author uses the Conocephalites calciferous for the genotype of a new genus 
Saratogia, placing under it six species, four new: S. arses, S. aruno, S. hera and S. 
volux, with Crepicephalus Wisconsensis Owen; including as syn. Dikelocephalus lati- 
frons, described by Hall, also by Shumard, under this genus. 
In the family Ceratopygidae, genus Crepicephalus Walcott (not Owen), the author 
includes some 20 species. 
Walcott uses Dikelocephalus ? lowensis Owen, for the genotype. 
Owen’s genus, as the name implies, was for a slipper-shaped, tapering glabella, a 
true Ptychoparia species, which Corda named in 1847. Dr. Owen used the term 
Dikelocephalus for the mattock-shaped heads, and refers to Dikelocephalus such species 
as Walcott genotype, although Owen referred to Lonchocephalus, a form like Crepi- 
cephalus Towensis Walcott, on p. 624, pl. 1-A, fig. 15. 
Lonchocephalus might replace in part Anomocare, and Crepicephalus be referred to 
Lonchocephalus for Owen’s Lonchocephalus, p. 624, pl. 1-A, fig. 15. 
Walcott divides the pygidae into two groups: 
1. The Crepicephalus Towenis group. : 
In which the postero-lateral margins of the pygidium extend backward on each side 
from a broad base into a sharp, narrow spine. Test nearly smooth. Upper Cambrian. 
2. Crepicephalus Texanus group. 
In which the postero-lateral spines are long, slender, and attached to the side of the 
pleural lobe above the margin. ‘Test granulated. Lower Cambrian. 
The author describes and figures Crepicephalus angusta, C. camiro, C. comus, C. 
cossensis, C. coria, C. dis, C. Towensis (Owen) A. Liliana, C. Texanus (Shumard) var. 
danace and elongatus, C. thoosa, C. tripunctatus (Whitfield) also var. magnispinus, C. 
tumidus, C. unca, C. unzia, C. upis, and two doubtful species. 
Under the Family Oryctocephalidae, the author includes the new genus Vanuxemella. 
This genus, represented by I’. contracta and V’. nortia, from the Lower Cambrian, has 
a simple form, with some features suggesting Albertella. It differs in) absence of 
glabellar furrows, shorter eye lobes, absence of prolonged third segment of thorax, 
with only four thoracic segments. The long spines of the tail spring from about the 
fifth segment, while in Albertella they appear to be the extension of the first or second 
anterior segment. 
Walcott includes under his genus Karlia the genotype K. minor and Menocephalus 
