1. Paranephrops planifrons, White.

Paranephrops planifrons, White, Gray's Zoolog. Miscell. No. II., p. 79 (1842); Chilton, Trans. N.Z. Inst., vol. xxi., pp. 242, 249, pl. x., figs. 1–3 (1888); Faxon, Proc. United States Nat. Mus., vol. xx., p. 678 (1898).

Faxon speaks of this as a puzzling species. In specimens from Puriri Creek, a tributary of the Thames, from which White's type specimens were obtained, he says, “The rostrum tapers off into a long and sharp acumen, which overreaches the distal end of the antennular peduncle. Each side of the rostrum is armed with three teeth, which are produced into long spine-like points…. The antennal scale is long, and diminishes in width from the basal third to the tip; it exceeds the rostrum in length. The post-orbital ridge is interrupted between the two sharp spines with which it is armed. A median ridge runs along the gastric area, reaching forwards as far as the anterior pair of post-orbital spines, but not continued on the rostrum. There are two or three sharp spines on each side of the carapace, just behind the cervical groove, besides several more on the hepatic and ptery-gostomian regions. The areola is very short and broad—not much over one-third as long as the distance from the cervical groove to the tip of the rostrum. The abdominal pleuræ are bluntly angulated. The hand is long and narrow, its superior and inferior margins nearly straight, parallel, and armed with a double row of spines—those on the superior margin the longest. The inner and outer faces of the hand are convex, and sparsely armed with spines, the largest of which are disposed in a median longitudinal row on each face.”

Specimens from Karaka, Manukau Harbour, are quite similar, but those from Lake Roto-iti and more southern localities “differ constantly in having a shorter rostral acumen, shorter lateral rostral teeth, shorter and broader antennal scale; the areola, or, in other words, the posterior section of