Arietiform

The arietiform marks become broader and more prominent.

The great mass of the strata in question clearly belongs to the "Lima-beds or Zone of Ammonites Bucklandi." This is proved by the remarkable abundance of Gryphœa arcuata of the typical form, and by the numerous and fine examples of Lima gigantea which occur—and especially by the presence of such characteristic arietiform Ammonites as A. Bucklandi, Sow., A. Conybeari, Sow., A. Kridion, Hehl, and many others.

The species is S[chlegelia] wilsoni, better known as Paradisea or Diphyllodes wilsoni, of Waigiou and Batanta. The male is 7¼ inches long, the tail 2, with its middle pair of feathers as long again, twice crossed and then curled in arietiform figure.

The writer is of the opinion that this grouping is in great need of revision, in the following respects: Halilucites comprises the arietiform Hungarites of the Bosnian Muschelkalk and is either a synonym or subgenus of Eutomoceras Hyatt, for the type species of Hungarites Mojsisovies is one of the arietiform group and closely allied with Eutomoceras laubei Meek, the type of Eutomoceras.

Discotropites mojsvarensis Smith, […] The form and ornamentation are decidedly arietiform and bear some resemblance to the arietiform Eutomoceras (Halilucites) of the Middle Triassic but differ in the spiral lines, long body chamber, and digitate septa.

As compared with D[ipodomys] a[gilis] agilis, D. a. fuscus [a subspecies of kangaroo rat] differs as follows: Dorsal color darker; yellow-orange of sides paler, arietiform facial markings heavier, and black rather than brownish; […]