370 
ZOOLOGY. 
which in his specimen Avas relied npon by Mr. Redfield as a good means of distinguishing his 
spe.cies from Triton canceUatum of Lamark. Dr. Gould, from the notes of Mr. Couthouy and 
Dr. Pickering, has described the animal of each, the one collected at the Straits of Magellan 
and the other at Paget Sound, considering them entirely distinct. 
Reeve, and Dr. Gould after him, quote Jay as the author of the species, and original 
describer in the annals of the Lyceum of New York. Middendorff and Carpenter call the 
author Say. The credit is really due to Mr. J. H. Redfield, as above cited. 
CHRYSODOMUS ANTIQUUS. 
Chrysodoimif antiqvm, Sivainson ? Carpenter, Rep. p. 343. 
Miirex antiquus, Linn. Syst. Nat. ed. 12, L Gmel. cd. 13. 
Fusus ant'.quus, Lam. ^n. saus vert, ed. 2, IX, p. 447. 
Tritonium (Fusus) auliquum, Midd. MalacoL Ross. II, p. 131. 
Tiit. (Fas.) arUiquvm, yar. Behringiana, Midd. Rei^^e, II, 224, pi. x, f. 3. 
Iliib — Strait.s of Juan de Fuca ; Dr. Suckley. Behring's straits ; Middendorff. 
But one specimen of this species was obtained, which agrees with the variety from Behring's 
straits represented by Middendorff in his Reise, though showing still less carination on the 
penultimate whorl. The figures of his "varietates Behringiange," in the "Beitrage,'-' repre- 
sent a different but allied variety. 
CHRYSODOMUS MIDDENDORFII, n. s. 
Tritonium (Fusus) decemcostatum, Midd (nee. Say) Beitrage, II, p. 138, pi. iv, fig. 15, (the sculpture only.) — Carp. 
Rep. p. 217. Omitted in his Gen. Catalogue, p 343. 
Ilab. — Straits of Juan de Fuca ; Dr. J. G. Cooper. Kodiak, Kenai ; Middendorff. 
DESCmrTiON. — Shell light horn color, the ribs darker, within white, tinged with violet ; solid, ventricose-fusiform, the 
■whorls convex, planulate on the upper part, encircled with strong well marked and elevated ribs, three to four on the 
whorls of the spire, ten to twelve on the la^t whorl, some near the canal less distinct, with intervening stiiae, which are 
more distinct forward ; canal somewhat cuived, equalling in length about two-thirds the breadth of the aperture. Length, 
2.6 inches; breadth, 1.5 ; length of aperture, 1.7 inch. 
This species is strikingly different from Fusus decemcostahis, Say, in the convexity of cdl the 
whorls, as well as in the angle formed in the outer lip by the termination of the first rib. The 
upper part of the last whorl is planulate, meeting the whorl above nearly at a right angle, 
while in the eastern species the same part is broadly excavated, rising steeply towards the 
suture. In the latter the penultimate and smaller whorls are made concave by the excavation 
between the two ribs Avhich they generally exhibit, while the new species shows four on the 
penultimate and three on the smaller whorls. In F. decemcostalus the first rib is stronger and 
more prominent than those below it, while in the new species it is less so. Philippi's figure 
of Say's shell represents a variety, and not the normal state of the species. Our specimen of 
the new species is furnished with twelve more or less distinct ribs. The eastern shell, (from 
the examination of one hundred and thirty specimens,) appears to have seldom more than 
seven to eight, rarely nine ribs. 
Fimis spitzbergensts, Reeve, (in Belcher's Arctic Voyage, II, p. 395, pi. 32, f. 6, a. b.,)is an 
allied, but, judging from the figure and description of Mr. Reeve, a very different species. 
A single specimen collected b}' Dr. Cooper on the shore of Whidby's island, in the Straits of 
Fuca, Avith that described by Middendorff, arc all at present knoAvn of this interesting species, 
first pointed out to me by Dr. Gould as the F. decemcostatus of Middendorff. 
