Hyatt.] 334 [April 4, 



this genus to his genus Pinacoceras, from which, however, it is 

 separable by the characteristics given above, and by the very 

 simple flexuous lobes and saddles of the adolescent stage, which 

 resemble those of Sandbergeoceras. 



[Sagecerae.] 



Medlicottia, Waagen, Paleontol. Indica., ser. 13, pt. 1, p. 39, 

 and p. 83, equals part of Sageceras as formerly defined by Moj- 

 sisovics. The lobes are divided by single linguiform marginal 

 saddles, and the second species named below has trifoliate, or 

 divided saddles, though the first pair and the marginal lobes have 

 the same form as in Orbignyanum. The ventral lobes are deep 

 and apparently undivided, the first pair of saddles are narrow 

 long, and the margins cut by several lobes and saddles growing 

 progressively longer internally. The numerous auxiliary lobes 

 are generated apparently as in Beloceras from the marginal 

 divisions in the outlines of the first pair of saddles, and from the 

 division of large magnosellarian saddles near the umbilicus. We 

 only know of two sjjecies which can be properly included in the 

 genus. They are Medlic. (Gon.) Orbignyianum, sp. M. V. K. 

 Russ and Ural Mts., pi. 26, fig. 6, and Medlic. primas, Waagen, 

 Pal. Indica., ser. 13, pt. 1, p. 39 and 83, pi. 2, fig. 7, both Dyassic 

 forms. Mojsisovics has pointed out the probable connection of 

 this group with Beloceras and Sageceras in his Med. Trias. Prov. 

 p. 183, and in this we also concur. There is no proof in support 

 of Branco's opinion, that forms like these with divided lateral 

 lobes can be separated from true Goniatitinae, but the contrary 

 appears to be evident in all forms of the Carboniferous, Dyas, 

 and Trias. 



Sageceras, Mojsisovics, Mediterr. Trias. Prov. p. 187, Das 

 Gebir. um Hallst. p. 69, is a Triassic genus, which, as shown by 

 this author's admirable figures, has the closest relations of affinity 

 with both Beloceras and Medlicottia. The lobes are more nu- 

 merous than in Medlicottia and are divided by small saddles, 

 which are themselves slightly denticulated, showing a nearer 

 approximation to the marginal saddles and lobes of Ammonitinae 

 than any other Goniatite except Cyclololus. Of the three species 

 mentioned by Mojsisovics, two S. Haidingeri, sp. Hauer, and S. Wal- 

 teri, sp. Mojsis . are European. In America Sag. Gabbi, Mojsis., 



