398 GEOLOGY OF OLD HAMPSHIRE COUNTY, MASS. 



the liquid lava, burned, and the cavity immediately after filled with lava 



from above. I have collected such specimens at Kdauea. This rock 



came probably from near the south end of the Deerfield sheet, where the 



river crosses it, and where several amygdaloidal beds show that the 



sheet is made up of a number of successive flows, one quickly following 



another. 



LoPERiA SIMPLEX Newbcrry.^ 



Professor Newbeiry has given this name to the plants whose stems 



appear commonly as simple cylinders about an inch across. They occur 



abundantly in Springfield, and were filled at one locality by a sand that 



differs from that which inclosed them by its freedom from mica scales and 



its pale-green color. 



INSECTS. 

 MORMOLUCOIDES ARTICULATUS E. HitchcOck. 

 1858. M. articulatus E. Hitchcock. Ichuology of New Englaud, pp. 7, 8, pi. 7, 



figs. 3, 4, with letter of Professor Daua. 

 1862. Palephemera medieva E. Hitchcock. Am. Jour. Sci., 2d serie.s, Vol. XXXIII, 



p. 452. 

 1867. M. articulatus S. H. Scudder. Proc. Boston Soc. Nat. Hist., Vol. XI, p. 140; 



Geol. Mag., Vol. V, p. 218. 

 1871. M. articulatus A. Packard. Bull. Essex lust.. Vol. Ill, p. 1. 

 1886. M. articulatus S. H. Scudder. The Oldest Known Insect-Larva, from the 



Connecticut River Rocks. Mem. Bost. Soc. Nat. Hist., Vol. Ill, p. 431. 



These remarkable forms were found in considerable numbers in the 

 fine black shale at Turners Falls. A series of slabs containing each a gi'eat 

 number of indviduals is preserved in the museum of Amherst College. A 

 full history and description of the species and abundant illustrations are 

 given in the last article cited above. 



Professor Dana first decided that the form was a neuropterous larva. 

 Mr. Scudder and Professor Packard concluded that it was a coleopterous 

 larva. In the last work Mr. Scudder returns to the first conclusion, that it 

 is probably the larva of a sialidan neuropterou. 



FISHES. 



The monograph upon the fossil fishes of the Trias,^ by Dr. Newberry, 

 should be consulted by anyone wishing to become acquainted with what 



' Fossil Fishes and Fossil Plants of the Triassic : Mon. U. S. Geol. Survey, Vol. XIV, 1888, p. 93, 

 PI. XXV, tigs. 1-3. 

 ■ Idem. 



