116 SAN DIEGO SOCIETY OF NATURAL HISTORY 
Wade (A.) On the Llandovery and associated rocks of Northeastern 
Montgomeryshire, 
Quart. Jour. Soc. London, vol. 67, No. 267, 1911, p. 415, plates 33-36. 
Notes on the Paleontology of the area 1—Trilobita. 
The author describes the following species: 
Trinucleus intermedius sp. nov. 
Refers T. concentricus Hjall, Pal. N. Y., vol. 1, p. 249, pl. 65, figs. 4a-4c; also p. 
255, pl. 67, figs. la-h, to the new species. 
Dionide sp. 
Ostracoda Melanella n. gen. 
The author gives the following description of the genus: 
Carapace small; equivalves moderately convex, subcircular, rather flattened an- 
teriorly; hinge straight; valves with a small, faintly raised horseshoe ridge confined 
to the posterior half, enclosing a small semicircular sulcus; edges simple. 
The genus is closely allied to Jonesella of Ulrich. 
Melanella hemidiscus gen. et sp. nov. 
Primitiella unicornis Ulrich. Primitia Ulrichi Jones, P. tumidula Ulrich. Ctenobolina 
cf. ciliata Emmons. Bolla lata V. & H. Krausella arcuata Ulrich. 
Walcott (Charles D.) Description of new genera and species of 
fossils from the Middle Cambrian. 
Proc. U. S. Natl. Mus., vol. 11, 1888, Washington, 1889, pp. 441-446. 
The author includes under the genus Dorypyge the following species: 
D. richtofeni with Olenoides nevadensis, O. quadriceps, O. wasathchensis and O. 
curticei—a new species which he illustrates on p. 444, fig.; also the new genus Karlia, 
named in honor of Dr. Karl Rominger. 
Genotype Karlia minor n. sp. 
The author refers Menocephalus salteri Rominger, 1887, Proc. Acad. Nat. Sci., pt. 1, 
p. 16, pl. 1, fig. 6, to a new species: Karlia stephenensis. 
The Bathyurus Rominger, Proc. Acad. Nat. Sci. Phila., pt. 1, pl. 18, fig. 8, is referred 
to Bathyuriscus (Kootenia) dawsoni n. sp. 
A new genus, Ogygopsis, is founded on the species Ogygia Klotzi Rominger, it dif- 
fers from Ogygia in having a well-defined ocular ridge, and in the narrow palpebral 
lobe. 
——— Cambrian Fossils, Yellowstone National Park. 
Mong. U. S. Geol. Survey, No. 32, part 2, pp. 440-478, plates, 1899. 
A gnostus interstrictus White, A. bidens H. & W., A. tumidosus H. & W. 
Ptychoparia Penfieldi n. sp. P. antiquata Salt. P. (Euloma) affinis Walc., P. 
Llanoensis Walc., P. sp. Crepicephalus Texanus Shumard, P. (Lonchocephalus) hamu- 
lus Owen, P. (Lonchocephalus) Wisconsensis Owen, P. ? diademata Hall. 
Arionellus levis n. sp. Arionellus sp. Liostracus parvus n. sp. Solenopleura Weedt 
n. sp. Zacanthoides sp. Bathyuriscus sp. 
Precambrian fossiliferous formations. 
Bull. Geol. Soc. Amer., vol. 10, pp. 189-244, 1899, plates. 
Beltin Danai n. gen. et sp.; also figures of Pterygotus, Eurypterus, Slimonia and 
Stylonurus for comparison. 
The author refers to the genus Beltina certain fragmentary remains of a crustacean 
collected from the calcareous Greyson shales of Montana, and remarks, as far as can 
be judged from what we now know of it, is referable to the Merostomata. 
