92 MALONE JURASSIC FORMATION OF TEXAS. [bull. 266. 
TTJRRITELLID^. 
Genus TURRITELLA Lamarck. 
TURRITELLA BURKARTI Sp. 11. 
PI. XX, fig. 5. 
Shell turreted, of moderate size for a Turritella, consisting of numer- 
ous whorls, which are greatly convex, wider than high, and medially 
(•annate by virtue of the ornamentation, bearing four granulated, 
revolving raised lines, of which one, much larger and more prominent 
than the others, and more decidedly cariniform, crosses the middle of 
the whorl, while 2 of the 3 smaller and subequal ones are placed, 
respectively, just below and just above the upper and lower limiting 
suture, the remaining one being placed between the uppermost one 
and the large carina, and nearer to the former than to the latter, so 
that the 3 intervals increase serially from uppermost to the lowermost. 
Aperture unknown. 
Measurements. — The type and only known specimen includes four 
largely embedded whorls within a span of 14 mm. The largest one 
of these whorls has a height of 4.5 mm. and an exposed breadth of 
5.5 nun., which is less than the true breadth, only about a third of each 
whorl being free from the matrix. 
Occurrence. — In the anticline on the east slope of Malone Moun- 
tain, nearly 1 mile north of its southern end; collected by Doctor 
Stanton. 
The species is named after a former traveler in Mexico, Mr. Joseph 
Burkart, who, as quoted from his "Aufenhalt und Reisen in Mexico 
in den Jahren L825 bis L834 " by Castillo and Aguilera, on page V of 
their Fauna Fosil, has recorded a Turritella (identified as to genus 
by Professor Goldfuss) as collected by him in the Mineral de Catorce 
some three-quarters of a century ago. The species collected by him 
may. by no means improbably, have corresponded in geological age 
and in kind with the Malone species above briefly described. 
VERMETID^. 
Vermeti s cornejo] Castillo and Aguilera ?. 
PI. XX, fig. 6. 
Vermetus (Burtinella) cornejoi Castillo and Aguilera, 1895, Bol. Com. 
Geol. Mex., No. 1. p. 12, PL VI. figs. 5, <J, and 7. 
Eight specimens of Vermetus, from the Theta, 1.] miles east of 
Malone station, are referred to this species. They show only the inner 
