No.iiii. AMI'JRiCAy I'ALEOZOIC IX>;ECTS—1IAXDL111SV1I. 671 



M A M M I A , new genus. 



Costal l)<)rder gentl}^ curved. Costal area naiTow. Kadi us situated 

 nearer the subcosta. Radial sector avisiuo- about in the middle of the 

 winy'. The media sends oli' its very strony-ly arcuate anterior branch 

 just before the origin of the radial sector, which it approaches and 

 then continues in a laro'e curve backward. The posterior branch of 

 the media again furcates at about the level of the origin of the radial 

 sector. The cubitus is already divided very near the base of the wing, 

 its branches, as well as the first anal vein, extending in a broad curve 

 to the inner margin. Tiie intercalai'v neuration consists of a close 

 irregular network. 



MAMMIA ALUTACEA, new species. 



L()C((nty. — Mazon Cret'k, near Morri-^, Illinois. PennsylvaJiiaii: 

 Kittamiing^ (All(\gheny) stage. 



The fragment. 24 mm. long, of a wing from 40 to 50 nmi. in length. 

 IJoh/i/pr.— Cat. No. 88829, U.S.N.M. 



JL. 



Fig. 1.— Mammia alutacea. 



Notwithstanding the incompleteness of this specimen 1 l)elieve it 

 possible to regard it as nearly related to the European Dictyoneuridje. 



TITANODICTYA, new genus. 



TITANODICTYA JUCUNDA (Scudder). 



TitanojihasmajacuvdaiivvnBEB., Proc. Amer. Acad., XX, 1S85, p. 1()9. 

 Dictyoneurn jucunda Bron(;niart, Bull. Soc. Rouen (3), XXI, 1885, j). 62. 



Locality. — Campbells Ledge, near Pittston, Pennsylvania. Upper 

 Transition group, near top of Pottsville. 



This form, as yet not figured, is closely allied to the genus Dictyo- 

 neura (iroldenbevg. 



The genus Titnh<>ph((i<iiia Scudder is ditierent from Brongniart's 

 genus of the same name, and must therefore receive a new name. 

 Scudder ranks this form, also, with the protophasmids. 



Holotyj>e.—Cat. No. 38154, U.S.N.M. 

 Proc. N. M. vol. xxix— 05 47 



