458 SAMUEL II. SCUDDER ON 



whole a subfusiform bundle, its outer apex directed toward the extremity of the anal 

 furrow; they seem, however, to terminate rather on the innermost vein which runs par- 

 allel to the margin, than on the margin itself. The anal area and the outer adjoining 

 parts show a fine eross-veining breaking up the interspaces into tolerably regular quad- 

 rate cells. 



Length of fragment. 10 mm.; presumable length of wing, 11 mm.; its breadth, 3.25 

 mm. The specimen, received through the favor of Mr. Brodie, comes from England, 

 but its location and horizon are not indicated. It is probably from the Purbecks, and is 

 named in memory of William Buckland. The wing is of the same color as the dull blu- 

 ish gray matrix, but the veins, generally scarcely darker, are in places quite black. 



Mesoblattina elongata. 



[Without name] Westw., Quart. Journ. Geol. Soc. Loud., x, 391, PI. 15, fig. 23. 



Blattlna elongata Gieb., Ins. Vorw., 322. 



Mesoblattina elongata Scudd., Proc. Acad. Nat. Sc. Philad., 1885, 115. 



This species is too obscurely figured to enable me to describe its structure in detail, 

 but it certainly agrees closely with M. Bueklandi, with which it agrees well also in size. 

 As, however, they differ in several points of importance, I have not thought it right to 

 consider them identical; in particular may be noted in this species the comparative 

 brevity of the humeral field, which appears to be broken off, the abundance of the costal 

 nervures, and the upward sweep of the median nervules. 



The species is represented as 11.75 mm. long, and comes from the Middle Purbecks 

 of Durdlestone Bay, England. 



Mesoblattina protypa. 



Blattina {Mesoblattina) protypa E. Gein., Zeitschr. Deutsch. geol. Gesellsch., 1880, 



519-20, PL 22, fig. 1; Id., ibid. 1884, 569-70. 

 Mesoblattina protypa Scudd., Proc. Acad. Nat. Sc. Philad., 1885, 114. 



This species, distinguishable among its neighbors by the comparative brevity of the 

 humeral field, the narrowness of the costal area and the straightness of the mediastino- 

 scapular vein, has been carefully described and figured by Geinitz, and needs no further 

 mention here. 



The wing is 8.5 mm. long and comes from the Lias of Dobbertin, Germany. 



Mesoblattina Murrayi sp. nov. 



PI. 47, fig. 4. 



This species, known by a single example broken in the middle and lacking the tip, is 

 still so nearly complete as to be satisfactory, audits evident relationship to the next two 

 species shows that, although the anal veins are wanting, it must fall in this group. The 

 specimen is scarcely dingier than the dirty chalky-white stone on which it lies, the veins 

 concolorous. The upper surface is exposed and it is well arched, the veins impressed, 

 the interspaces convex, and when narrow, as at apex, prominent. The wing is broad- 

 est a little before the middle, and tapers very gently owing to the arcuation of the 



