On some Afoot Points in Ornithological Nomenclature. 419 



generalized type of great antiquity, and thus unites in itself 

 characters of Phyllopoda, Copepoda, and Decapoda. 



The specimen found by me, which was over £ inch in 

 length, has the carapace extending back to about the third 

 abdominal segment on the sides, but with a rather wide 

 dorsal sinus. The beak is large and well developed. The 

 eyes are similar to those of N. bipes of Europe, being situated 

 on movable peduncles, and formed of numerous crystalline 

 bodies under a common cornea. The antennae are furnished 

 with numerous hairs on their peduncles. The superior pair 

 have a peduncle of two joints, the last of which bears two 

 appendages, consisting of: — (1) a short triangular joint, with 

 spines on its outer margin, and an oval ciliated plate ; and 

 (2) a slender flagellum of several articulations, the number of 

 which were not made out. The inferior antennee consist of a 

 peduncle of three stout joints (the second of which bears a 

 large tooth on its upper margin, while the terminal one is 

 furnished with rows of spines and hairs on its outer margin 

 and a bunch of hairs at its extremity), and a long slender 

 flagellum, consisting of between 70 and 80 articulations, and 

 almost equal in length to the whole body. The branchial 

 feet, which were apparently very slender, were completely 

 concealed beneath the carapace. The third to the seventh 

 (inclusive) abdominal segments have their posterior margins 

 finely dentated. The four pairs of natatory feet have the 

 peduncles largely developed ; and their branches bear a row 

 of spines on each outer margin. The caudal appendages also 

 have a row of spines on each side, and are terminated by 

 several long filaments, which are minutely plumose. 



Pale yellow in colour and semitransparent. Length 0*35 

 inch. 



EXPLANATION OF PLATE XIX. Figs. 7-9. 



Fig. 7. Ncbalia longicornis, x 10. 



Fig. 8. The same, base of superior antenna?. X 20. 



Fig. 9. The same, base of inferior antennae. X 20. 



XLVIII. — More Moot Points in Ornithological Nomenclature. 

 By Alfred Newton, M.A., F.R.S., &c. 



Nomenclature is so trifling an adjunct to zoology that ho 

 true student of the science can fail to grudge the time which he 

 is, on certain occasions, compelled to bestow upon it, or ought 

 to be ungrateful to those who have expended their toil in pre- 

 paring some rules for his guidance through the intricate maze 



30* 



