COSMOCERATIDA 103 
VAScCOCERAS HARTTI (Hyatt) 
TEA DIAG, ake, CG, 
Ceratites harttii Hyatt, 1870, Geol. and Phys. Geog. Brazil, p. 386. 
Buchiceras harttii Hyatt, 1875, Proc. Boston Soc. Nat. Hist., Vol. XVII, p. 370. 
Ammonites harttii White, 1888, Arch. Mus. Nac. Brazil, Vol. VI, pl. 19. 
Vascoceras ? harttii Chottat, 1898, Faune Crét. du Port., Vol. I, 2d series, pl. 13. 
This fine fossil was received from Prof. J.C. Branner, and was collected 
by him not far from the locality of White's fossil of the same species. It is 
a cast, the diameter of the whole is 175 mm., the transverse diameter of the 
last volution is 124 mm. The form and general aspect is about the same 
as in White’s figure; living chamber of the same length—three-fourths of a 
volution—and also other external characters and sutures are as described in 
remarks upon the genus; the inner volutions could not be exposed. There 
is not the slightest fragment of shell upon this cast, but there are the 
remains of the cemented valves of two or three ostreans., With reference to 
these I again reiterate the opinions expressed with reference to Hartt’s and 
White’s specimens. This cast. must, like these, have been a fossil at the 
time the ostreans were building their shells, since their valves are attached 
to the surface of the cast and fit into the irregularities produced by abrasion 
before they began to grow on its exposed surface. It was not a member of 
the fauna in which they were found, but came from some earlier strata. 
Locality: Province Sergipe, Brazil. 
Age: Cenomanian? 
TOLYPECERAS*® n. gen. Hyatt. 
The curious species upon which this is founded, Tolypeceras (Amm.) 
marcousanum, described and figured by Pictet and Campiche in their Ter- 
rains Crétacés de St. Croix, is represented in the collections of Museum of 
Comparative Zoology by a fragment collected by Jules Marcou, near ' 
Nozervy, in Switzerland. This is, however, sufhcient to enable me to see 
that the sutures of a somewhat younger stage than those figured by Pictet 
and Campiche are of the same type as those of Lenticeras, but with shorter 
marginals. The first lateral saddle is broad and solid and the other saddles 
are also broad and not deeply cut into. The outer volution is 22 mm. in 
« ToAtry, a lump. 
