14 [363] A. Wincliell on supposed New Cephalopods . 
closest European analogue is G . mixolobus. Phil., from the Moun¬ 
tain limestone of the Isle of Wight and the “ Posidonomyen- 
schiefer” of Wiesbaden. Its nearest American analogue seems 
to be G. Lyoni Meek and Worthen (Proc. Acad. Nat. Sci. Phil., 
Oct., 1860), with which Prof. Hall’s G. Hyas is identical (see 
13th Rep. Regents N. Y., p. 102). The Michigan species, how¬ 
ever, differs from the Rockford one in the addition of an acces¬ 
sory lobe and saddle, and in the dorsal lobe being broader and 
relatively longer. It is also somewhat more involute. 
Goniatites Houghtoni, n. sp. 
Shell moderately long, whorls but slightly impressed, almost 
evolute; transverse section elongate-oval, abruptly rounded at 
the dorsal and ventral extremities, and nearly flat on the sides. 
Surface of shell apparently smooth. Septa rather remote. Dor¬ 
sal lobe infundibuliform, attenuately acute, length equal to 
breadth of its base; first lateral lobe clavate, acute, twice as 
long as broad, reaching as far back as outer lobe; second lateral 
lobe of the same form as the first but somewhat larger; acces¬ 
sory lobe present, but not distinctly seen. Saddles all regularly 
rounded at the extremity; the dorsal, broadest at the base, the 
other two clavate and reaching one-third their length further 
forward than the dorsal. 
Greatest diameter 1*75 (100); major axis of transverse sec¬ 
tion *42 (24); minor axis # 21 {12); length of dorsal lobe T2 (7); 
distance from tip to tip of two contiguous dorsal lobes -24 (14). 
Locality. Marshall. 
Resembles the preceding but differs materially in the form of 
the dorsal lobe and the transverse section. It differs from G . 
Lyoni Meek and Worthen, in the greater relative length of the 
second lateral lobe and the first accessory saddle, as also in the 
more appressed transverse section. Its closest affinities are with 
G. Henslowi Sow., but differs in the more acute lateral lobes, 
and relatively longer lateral and accessory- saddles. 
Goniatites Allei, n. sp. 
Shell laterally compressed, the inner whorls impressed to the 
middle of the outer; umbilicus very small, not disclosing any 
of the inner volutions; aperture auriculate. Section (of an en¬ 
tire whorl) through the umbilicus, at right angles with the 
siphon, an elongated ellipse. Surface unknown, but the cast is 
marked along the dorsal region by minute, irregular, revolving 
striae. Dorsal lobe wanting or too minute to be detected in 
sandstone casts. First lateral lobe acute, terminating at an 
angle of about 60°; second lateral lobe extending as far back 
as the first, its apex in the form of a low gothic arch, body of 
the lobe campanulate, equilateral. Dorsal saddle parabolic, not 
