562 
A. E. Verrill — - Catalogue of Marine Mollusca. 
Neaera rostrata (Spengier) Loveu. 
Necera rostrata Loveu, Iud. Moll. Scand. Occid., p. 47 (description), 1846. 
G. 0. Sars, op. cit., p. 89, pi. 6, figs. 7 a, b, 
Verrill, Amer. Journ. Sci.,* xx, p. 392, Nov., 1880; Proc. U. S. Nat. Mus., iii, p. 
398, 1880. 
Plate LVIII, figure 39. 
This is easily distinguished from our other smooth species by its 
very long and narrow posterior rostrum, and by the oval form of 
the shell. It has a nearly smooth surface. 
Several specimens of this species were dredged by us in 1880 , 
about 70 to 75 miles south of Martha’s Vineyard, stations 870 - 874 , 
in 85 to 155 fathoms, and 90 to 100 miles south from Newport, R. I., 
stations 876 , 892 , 894 , in 120 to 500 fathoms. 
In 1881 , it occurred at stations 921 , 949 , 1035 , 1036 , 1038 , 1040 , in 
65 to 146 fathoms. At station 949 , in 100 fathoms, 15 specimens 
were taken. 
On the European coast, from Lofoten I. to the Adriatic Sea. 
North Sea; Bay of Biscay, etc. West Indies, off Barbadoes and 
Sand Key, 80 to 100 fathoms, “ Blake ” Expedition (t. Dali). Off 
Patagonia (t. Jeffreys). 
Neaera glacialis G. 0. Sars. 
Necera glacialis G. O. Sars, op. cit., p. 88, pi. 6, figs. 8 a-c. 
Verrill, Proc. U. S. Nat. Mus., iii, p. 397, 1880. 
Necera arctica Verrili, Amer. Journ. Sci., vi, p. 440, 1873 ; vii, p. 412, 1874 (? non 
N. arctica M. Sars.) 
Plate XLIV, figures 10, a, b . 
This is, by far, the commonest species of Necera found on our 
coast. It occurs in 30 to 500 fathoms. 
Among our numerous specimens there is considerable variation in 
the form and texture of the shell, character of the surface, size and 
form of the cartilage-pit (see fig. 10), and in the form of the lateral 
tooth. Moreover, the fofm of the cartilage-pit and lateral tooth is 
not closely correlated with the form of the shell and length of the 
rostrum. 
I find among our shells, not only forms corresponding to the fig- 
ures of N glacialis (fig. 10, b) and N obesa (fig. 10, c) by G. O. Sars, 
but many, also, that are intermediate between his N glacialis and 
N arctica . There are few, if any, that have the beak so short and 
broad as he figures it in N arctica. But many of our larger shells 
(see fig. 10, a) have the form and size of cartilage-plate characteristic 
of N. arctica , as figured by Sars. The greater number of our larger 
