562 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [60] 
As it is always important, in giving the bathymetrical distribution of 
shells to distinguish between those taken alive and those of which only 
dead shells are obtained (which may have been carried by fishes, crabs, 
and various other agencies far from their true habitats), an asterisk (*) 
is added to designate living specimens, while a dagger (t) indicates 
dead shells. When no sign is added, it is to be understood that the 
specimens were living. The “ Bathymetrical range” here refers only to 
the range as actually observed in this region by the United States Fish 
Commission, unless otherwise stated. 
The geographical distribution is indicated, in a general way, by the 
abbreviations following the range in depth, but I have not attempted 
to make it complete in this respect. Owing to the uncertainty as to the 
alleged identity of the species recorded from other regions with our own, 
and to the incompleteness of the published lists of species collected by 
the various other recent dredging expeditions, the knowledge of the for- 
eign distribution of many of these species is still very imperfect, and is 
sure to be largely increased within a few years, so that any facts of this 
kind that can now be given will have, at best, only a temporary value. 
The abbreviations are as follows: N., = northern, indicates that the spe- 
cies ranges northward along the American coast, beyond New England 
waters ; S., = southern, southward beyond Cape Hatteras; Arc , = Arc- 
tic; Eu., = European; Med., = Mediterranean; Af., = West African ; 
P., = North Pacific; As., = North Asia; Cb., = Caribbean Sea and 
West Indies; Oc., = Oceanic or pelagic. . 

America, with descriptions of new genera and species and critical remarks on others. 
Proceedings ot the United States National Museum, vol. iii, December, 1880, and Janu- 
ary, 1881. 
Part II, Mollusca, with notes on Annelida, Echinodermata, &c., collected by the 
United States Fish Commission [pp. 356-405], December, 1880, and January, 1881. 
Part III, Catalogue of Mollusca, recently added to the Fauna of Southern New En- 
gland [pp. 405-409], by A. E. Verrill. 
Part IV, in vol. v [pp. 315 to 343], 1882, Additions to the deep-water Mollusca, taken 
off Martha’s Vineyard, in 1880 and 1881. 
The Cephalopods of the northeastern coast of America. Part II, The smaller Ceph- 
alopods, including the ‘‘Squids” and Octopi, with other allied forms. Trans. Conn. 
Acad., v [pp. 259-424, pls. 26-56], June, 1880, to October, 1881. 
Report on the Cephalopods [of the “ Blake ” expedition, 1880], and on some addi- 
tional species dredged by the United States Fish Commission steamer ‘‘ Fish Hawk,” 
during the season of 1880. Bulletin Mus. Comp. Zool., vol. viii [pp. 99-116, 8 plates], 
March, 1881. 
Supplement report on the ‘ Blake” Cephalopods, vol. xi, pp. 105-115, plates i, ii, iii, 
1883. 
Report on the Cephalopods of the northeastern coast of America, This report, Part 
VII, for 1879 [244 pages, 46 places], 1882. 
See also Brief Contributions to Zoology, Nos. 40 to 56, in American Journal of Sci- 
ence, 1877 to 1884. 

