4 
out by Dr. Carpenter, and thè names on thè platee do not always agree with 
those in thè text. OC thè six species described bere, only one is new. As thè 
paper is not accessible to most studente, I bere give thè corrected synonyray 
of thè suppositious species, none of which are found at Sitka. 
1. Buccinum glaciai-e, Stiinpson. (Mon. Northern Buccinums.) 
j Tritonium carinatum, Dkr., p. ], pi. 2, f. 3-4.= 
( Tritonium angulosum, Mcerch. (on piate). 
Tritonium mcerchianum, Dkr., p. 2, pi. 2, f. 1-2. 
Tritonium rutilum, Moerch., p. 3, pi. 1, f. .ó-6. 
Tritonium rombergi, Dkr., p. 4, pi. 2, f. 5-6. 
All these varieties of thè well known Buccinum glaciale, are beautifully and 
thoroughly connected by thè really magnificent series of that species obtained 
by US during thè season of 1871-2, in thè Aleutian Islands. It belongs to thè 
Arctic fauna. 
2. Volutopsis Beringi, (Midd.), A. Ad. 
Tritonium Beringi, Midd. Mal. Ros. p. 147, pi. ili., f. 5-6. 1849. 
( ? Volutopsis norvegica, Chemn., N. European seas.) 
Neptunea castanea, Moerch., p. 7, pi. 1, f. 1-2. = 
Neptunea badia, Moerch. (on piate). 
This species, if not identical with thè European forra, is a raember of thè 
typical Aleutian fauna. 
3. Chrysodomus [Heliotropis) harpa. Dall, ex Moerch. 
Neptunea harpa, Moerch., p. 2, pi. 1, f. 3-4. 
This is an Aleutian species, found from thè Shumagins to TJnalashka, but 
everywhere very rare. 
It belongs to a group, characterized by thin, sinistrai shells, with mammillated • 
apices ; an operculura very sraall when compared with thè size of thè animai ; 
solitary ovicapsules of hemispherical forra, attached by thè entire base, smooth 
above, and maturing only two or three individuals to each sac, although of 
ranch greater size than thè ovicapsule of any other species of raollnsk in thè 
region ; and, probably, by dentition. l’his group may take thè snb-generic 
narae of Heliotropis. Our largest specimen exceeded six inches in length. Fus- 
us contrarius, of authors, of thè North European seas, may also belong to this 
group. 
Buccinum Dalei, Sby., or a related forra, was found by us at thè Shumagins. 
Fleurotoma circinata, n. s. PI. II, fìg. 5. 
Shell slender, elongate, covered with a brownish cpidermis ; whorls six, with 
a single, sharp, narrow carina, about thè middle of thè whorl, in thè npper 
whorls ; this carina does not interrupt thè even rotundity of thè whorls so as to 
produce any flattening of thè latter, but appears as if it had been placed upon 
thè equator of thè whorl, after thè latter had been completed. The posterior 
surface of thè carina and that part of thè whorls bebind it, are destitute of any 
but thè most microscopie revolving stri®, though plainly marked by thè deeply 
notched lines of growth. The anterior surface of carina and whorls is covered 
with sharp, revolving grooves, with wider interspaces, being about twelve on 
