1894.] Loology. 527 
Hexapoda.—F. W. Goding catalogues with synonyms 278 species 
of North American Membracida. The new genera are Evashmeadea 
and Vanduzea. 
Joamny Martin has investigated the place of oxygen in insects.’ A 
solution containing indigo in a colorless condition, but capable of be- 
coming blue in contact with oxygen, was injected into the body cavity 
of various larve, and subsequent dissection showed that only in the 
neighborhood of the finest tracheal branches, where the “spiral fila- 
ment” is lacking, was the solution colored. Consequently it is only in 
these regions that oxygenation of the blood can occur. 
Hemichorda.—In an article “ Who First Found Balanoglosus ? ”®° 
the Rev. A. M. Norman says that Cavolini figures it in the Atlas of 
Delle Chiaje. To this Carus replies’ that in the text the figure is said to 
represent the spiral ovary [the urticating tentacles spirally coiled up] of 
“Rombo amento,” according to Delle Chiaje Stephanomia uvaria. 
Norman replies” that Cavolini’s figure refers to the “ ovary of Agal- 
mopsis cavolinit.” 
®Bull. Illinois State Lab. N. Hist., xiv, p. 391. 
1C. R. Soc. Philomath, Paris, 24 Dec., 1893. 
3 Ann. & Mag. N. H, xiii, 136, 1894. 
® Zool. Anz., xvii. Liter. p. 10, 1894. 
Pet., Sa. p. 216, 
