= 
Geology and Mineralogy. 307 
free distal phalangeal extremities are pres served. The shaft is 
roken, showing that its interior is filled with cancellous tissue. 
The free extremities are remarkable for the great interior extent 
of the articular trochlear face. The median is strongly grooved 
with an obtuse excavation, and the lateral or bordering ridges are 
G.i22b 
equal and rounde e groove is continuous with the superior 
surface, but not with the inferior. There the convergent lateral 
ridges inclosing the open groove, terminate in an abrupt elevation 
above the adjacent surface of the shaft. The sides at this point 
the external ridge dropping away cai ting as in many birds, gus 
comes then a part of a spiral, ind is “tle grooved above, but 
strongly Fated neebicl y vertical diameters of ~ ‘ides 
cae a inner being aa greater, and re con 
ca tan band m. 
msverse diameter of proxima lend - tarsometatarsus..-------- 100 
et g mata 0. (partly inferentia “070 
Interval between penetrating fnoiint on anterior face shaft ..-..- 017 
ong diameter--_... i 050 
Median distal condyle { Vertical diameter _..------------------- 048 
Transverse diameter. 20500. 2. SS ee 040 
Long diameter 037 
Internal distal condyle + Vertical diameter -_--.-.-..-------------- “040 
Transverse diameter .i..l<<-csccase-sce “031 
The large size and wide separation of the penetrating foramina, 
and the thin internal edge with suturul articular facet, distinguish 
this form as distinct from any of the genera of Stru thionide and 
Dinornithid. It is therefore named Diatryma gigantea. 
Lifth Aniual Report of the yer Survey of Indiana 
b 
xX, 
Mr. Joun Couumrr 5 a nd obse rvations in DeKalb and other 
counties, by G. M. Leverre 
Footprints of Labyrinthodont a found by Mr. Collett 
hear the base of the Coal ae n Warren county, are de- 
scribed and “hon they ar rt a it inches — and 1 to 14 
road, all 5-toed, and the sales is Pos inch e species . 
named by Prof. Cox Collettosaurus Indianensis 
. ak dees from “ pockets” in the cherty limestone above Coal 
? ubois county consists, according to Dr. J, Gardne r, almost 
- ally of spicules - sponges ; oak in one shay nodule 2 ame the 
out Vicinity, there was, in a cavity near on center, a slight net- 
_ of the glassy distiemnd of the sponge, abo ut which concretion 
ook poe, indicating, as stated by Dr. Gardner, that the horn- 
nodules found in the cherty beds correspond each to a fossil 
