Review of Recent Geological Literature. 193 
F. Matthew, M. A., F. R. S. C, (Trans. Roy. Society of Canada, 1893, 
pp. 95-109 and Plate vn, figs. 1 to 16.) 
This paper, as the writer himself states, contains descriptions of the 
fauna of the Arenig horizon (Div. 3d) in the Bretonian division, and 
also of certain graptolites and brachiopods of Bands a and o of the 
same division. The species are arranged according to their zoological 
standing and not their stratigraphical position, though the great ma- 
jority are from Band d (Arenig horizon) of the Bretonian. The grapto- 
lites are described conjointly by Mr. Matthew and Dr. Henry M. Ami, 
of the Geological Survey of Canada. The following species are therein 
recorded: 
1. Protospongia V 
2. Bryograptus patens, n. sp. 
S. Dictyonema delicatulam Dawson. 
4. " quadrangnlare Hall. 
5. Clonograptus ? spinosas, n. sp. 
6. " ftexilis Hall, var. 
7. Dichograptos logani Hall. 
8. Tetragraptus quadribrachiatus Hall. 
9. Didymagraptas patulus Hall. 
10. " nitidas Hall, var. 
11. " indentus Hall. 
12. Ketrograptus tentaculatus Hall ? 
13. Orthis electra Billings, var. major, n. var. 
14. " " " " la?vis, n. var. 
15. " orthambonites Pander. 
16. " euryone Billings ? var. 
17. " menapise Hicks ? var. 
18. " carausii Salter f 
19. Strophomena atava, n. sp. 
20. Camerella parva Billings f 
21. Styliola primaeva, n. sp. 
22. Creseis minuta, n. sp. 
23. " corragata, n. sp. 
24. Orthoceras— cf . O. priamus Billings. 
25. " " O. catolus Billings. 
26. Parabolinella posthuma, n. sp. 
27. " (?) sp. 
28. Oyclognathus rotundiformis Matthew. 
29. Euloma, sp. ? 
As may be clearly seen, many of the above species have equivalents in 
the Levis formation of Sir Wm. Logan, and are referable to his Quebec 
group. In the use of the title St. John group, the term cannot be 
called a geological one — inasmuch as these forms belong to the second 
fauna of Barrande. 
On Antennx and Other Appendages of Triarthrus Beckii. By \V. 
D. Matthew. Am. Jour, of Science, III, vol. xlvi, pp. 121-125, with a 
plate; Aug., 1893. In Hudson or Utica Bhales near Rome, N. Y., many 
specimens of this trilobite have been collected which show antenna 1 
* coming out close together under the center of the front border of the 
head-shield and generally diverging at an angle of 30° or 40°, composed 
of many joints, each about half as long as wide and smallest at the base. 
Both in position and structure they are like the antennae of modern 
crustaceans. Several of the specimens also show legs for walking or 
swimming and perhaps branchial appendages. Comparison with Wal- 
cott's previous studies of the genera Ceraurus and Calymene shows im 
portant points of contrast. "The homology with Limulus seems not to 
be as close in Triarthrus as in the forms studied by Mr. Walcott; but 
the characters seem to be of a more comprehensive type, approaching 
