. Carnegie Institution of Washington publication. SYSTEMATIC REVISION OF THE SUBORDER. 57 Dimetrodon longiramus sp. nov. (Text figures 15 and 16.) Cope. Name not published, but label found with a specimen. Type: A lower jaw and scapulae with a few vertebr£e. No. 4091 Am. Mus. Nat. Hist., Cope, coll.; from Texas. Homeotype: No. 4136 Am. Mus. Nat. Hist., Cope, coll. A fragmentary jaw, from Texas. The name "longiramus" was found written by Cope on a label with the fragmentary jaw, No. 4136. A closely similar jaw occurs with a scapula and a few vertebrae labeled D. 7'cctiformis. A lumbar
. Carnegie Institution of Washington publication. SYSTEMATIC REVISION OF THE SUBORDER. 57 Dimetrodon longiramus sp. nov. (Text figures 15 and 16.) Cope. Name not published, but label found with a specimen. Type: A lower jaw and scapulae with a few vertebr£e. No. 4091 Am. Mus. Nat. Hist., Cope, coll.; from Texas. Homeotype: No. 4136 Am. Mus. Nat. Hist., Cope, coll. A fragmentary jaw, from Texas. The name "longiramus" was found written by Cope on a label with the fragmentary jaw, No. 4136. A closely similar jaw occurs with a scapula and a few vertebrae labeled D. 7'cctiformis. A lumbar vertebra, though evi- dently belonging to Dimetrodon^ does not have the characters of the speci- men regarded by Cope as D. rectifoTmis. Description : The lower jaw is very long and slender and the posterior end resem- bles that of D. iiicisiviis in form, but the upper and lower edges are not expanded as in that species, so the jaw is not so high behind. The scapula is very short and wide compared with that of D. iiicisiz'iis and the articular face for the humerus very small. FOREIGN FORM. Ctenosaurus Koeneni v. Huene. Gaol, und Paleontolog. Abhdlg. Koken. N. F., Bd. vi, Heft I, 1902, s. 38. Type: A series of vertebrse with high spines gradually widening distally; preserved in a slab of stone. From the upper part of the Buntersandstein, east of Rheiuhausen near Gottingen. Preserved in the museum of the University of Gottingen. Original description (adapted from a translation): "The specimens consist of several slabs carrying a poorly preserved series of vertebras which have been greatly compressed. One of these vertebrae with the elongate spine attached measures 600 mm. in length. The spines are so much compressed that the bases are flat, though this may not have been the original condi- tion ; the upper part of the spine is naturally flat and the whole is bent and inclined to the rear. The verte- brae are almost twice as long as high. The spine is located over the middl
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