428 The American Geologist. June, 1894 
These descripl ions a re based upon fossils collected by Vbgel in the region 
from which Herberl Smith obtained the material described by Orville 
Derby in 1890. The locality is upon the Chapada-plateau, intheTaqua- 
rassu region, aboul 10 miles cast of Cuyaba, capital of the state of 
Matto Grosso; the rock principally a yellowish or rusty brown sand- 
stone (like mostof the fossil-bearing Devonian strata of South America), 
with intercalated clay shales. The following fauna is described: 
Harpes sp. Chonetes falklandica Morris and Sharpe. 
Phacops brazilii nsis < !larke. Spirifi r wg< li, nov.(cf. duodenariw Hall ), 
Bellerophon chapadensis, now Leptocoslia flabellUes Conrad. 
Tentaeulites bellulus Hall. 
Orbiculoidea baini Sharpe. 
Derby correlated the fauna on the basis of species identified by him 
with the middle Devonian or Erere fauna of the Amazonas, but v. Am- 
nion finds in it a closer similarity with the lower Devonian or Maecuru 
fauna of that region. 
Duslia, tiiK inn, Ghitonidengattung mis dem bshmisclien Untersilur, »< bst 
einigen Bemerkungen ilber dit gattung Triopus Barr. By .1. .1. Jaiin. (Sitz- 
unusber. der kais. Akad. der Wissensch. in Wien, Dec. 1893.) 
Duslia is a genus founded upon entire individuals strikingly similar 
in certain structural features to some of the recent Chitons, while all 
other of the older paleozoic remains which have been referred to the 
genus Chiton are more widely dissimilar from typical forms of that 
genus. The author regards Barrande's genus Triopus, described as a 
trilObite, also one of the Chitonidce. 
Wotes PaUontohgiques; I. Grustaees, By .1. Bergeron (Bull, de la Soc. 
Geol. de France. 3d ser. vol. xxi, pp. 333-347, pis. vn, vm). In this 
paper the writer gives a precise account of his trilobite genus AsdpJielina, 
which is an asaphid from the Arenig horizon, principally characterized 
by a pair of long pygidial spines. Further, the species Anihracopeltu 
crepini Boulay, from the coal measures of Bully-Grenay, is redescribed 
with figures, and shown to be a PrestiMcJlia. 
Tin Appendages of ///< Pygidium of Triarthrus. By C. E. Beecher. 
(American Journal of Science. April, 1894, pp. 298-300, pi. vn.) The 
author continues his elucidation of the ventral anatomy of the Trilobite 
by demonstrating that the endopodite and exopodite of the thoracic 
legs, which are adapted respectively to crawling ami swimming (see 
Am. Geologist, January, 1894) become progressively modified posteri- 
orly, and upon reaching the pygidium the proximal segments of the 
endopodite become greatly expanded, forming a paddle-like organ, 
whose form implies a modification of function, from crawling to swim- 
ming. The form of the pygidial exopodite is modified only in the 
greater development of the fin-like and fimbriated basal joint. 
Revision der ostbaltischen dlurisehen Trilobiten. AbtheUung IV; <'.iUjm- 
meniden, Proetiden, Bronteiden, Harpediden, Trinueleiden, Remapleiiriden, 
und Agnostiden. By Friedrich Schmidt. (Mem. del' Acad. Imp.desSci. 
