540 PROCEEDTNGS OF THE NATTONAL MUSEUM. vouxxiv. 
BOREOTROPHON SCALARIFORMIS Gould. 
This is the Fusus scalarifonnis Gould, in 1838, a large species, which 
has been confounded with B. dathratics, but is easily identitied. It is 
the largest Atlantic species, sometimes reaching a length of 53 mm., 
having 13 to 16 rather rude sharp lamellar varices, 8 whorls, a higher 
and more conical spire, a straighter and a more gradually attenuated 
canal and less excavated base. There is rarely any angle at the 
shoulder; if the varix is elevated here it is bluntly rounded, and the 
surface has only obsolete spiral striation or none. Its range is from 
Iceland to the Newfoundland lianks and Massachusetts Bay, and most 
of the specimens have been obtained from the stomachs of the haddock. 
BOREOTROPHON CRATICULATUS Fabricius. 
This species, which is characteristically Arctic, extends its range 
southward as far as the Newfoundland Banks. 
BOREOTROPHON ACULEATUS Watson, var. LACUNELLA Dall. 
I do not feel able to separate specifically the variety described in 
1889, from Watson's species dredged off Pernambuco in deep water by 
the Challe7U/er, and named in 1882. The differences are those which 
may be observed in any large series of a single species of arctic Tro- 
phon. The variety was described from the vicinity of Cape Fear, 
North Carolina, and I am unalile to separate from it the Trophon ver- 
rilll, described in 1893, from the same locality by Miss Bush. An 
extremely similar form was dredged off the coast of Senegal in about 
875 fathoms by the Travailleur, and descri))ed ]\y Locard in 1897, 
under the name of T. cossmanni. It appears to differ only by the pres- 
ence of a few feeble spiral threads visible between the varices. The 
variety Jacmiella ranges in deep water from the vicinity of Cape Fear 
south to the lesser Antilles, in 227 to 769 fathoms, and also occurs in 
the Gulf of Mexico. 
BOREOTROPHON ABYSSORUM Verrill. 
This is Trophon abyssorum Verrill, 1885, and its variety Ivm/kola 
with obsolescent spines, which was erroneousl}^ identitied by Jeffreys 
with T. vaginatv.s Cristofori and Jan, of the Mediterranean, and with 
T. clavatm Sars of Norway. It is a small, well-defined species, with 
sharp lateral!}" flaring spines at the shoulder, and the varices obsolete 
elsewhere. In the variety liiidcola the spines are obsolete and the 
varices more in evidence. The known range of both extends from 
Georges Bank off' Cape Cod, south to the vicinity of Cape Hatteras, 
North Carolina, in 81:3 to 1,859 fathoms. This and the preceding 
species are referable to the section Pagodula. 
