MOLLUSCA. 
631 
is of the type of the VasciolarudoR, the lateral plate being trans- 
versely elongate and multicuspidate, the middle one nearly 
square, with five points in the three former species, with a large 
and three small ones on each side in M,adusta (subgenus Nebu~ 
laria), and with eight equal in M. frag a (subgenus Chrysame)^ 
Cylindra is transferred to the Marginellida on account of the ra- 
dula (observed in C. nucea, p, 58, pL 5. fig. 7) wanting the lateral 
plates. Imbricarid conica (Schumacher) = Conohelix marmorata 
(Swains.) has short lateral plates with only two points, the inner 
one much stronger j the middle plate is nearly squq,re, with five 
points, the central of which is the strongest; this genus is there-^ 
fore transferred to his Fusacea [BuccinidcB] , among which it 
will form a distinct subfamily, Imbricarina (p. 86, pi. 8. fig. 6). 
Strigatella and Turricula agree with each other, and will form 
a family, to be treated of in a future part of the author’s work. ^ 
Mitra (Cancilla) strangei, sp. n., AngRS, Proc, Zool. Soc, p. IIO^ pi, 13. 
fig. 4, Port Jachson. 
Mitra graeffi,^ sp. n., Orosse, Journ. Oonch. xv, p. 297, pi, 11, fig, 6, Sftmpa 
Islands. Allied to M. dichroa and infrafasciata. 
Mitra assimilis, sp. n., Pease, Am. Journ. Conch, iii. p. 211, pi. 1S» fig. 1, 
Polynesia; M. Jlammulata, sp. n., Pease, 1. c. p. 212, Sandwich andPaumotu 
archipelago ; M. brunnea (Pease) is not identical with fuscescem of the 
same author. Pease, I c. p. 233 ; M. sextilisj sp. n., Pease, I c. p. 271, Hawaii; 
M. glabra, sp. n.. Pease, 1. c. p. 272, pi. 23. fig. 2, Ascension Island, Polynesia. 
Mitropsis, g. n.. Pease. Outer lip with a distinct sinus like Plmrotoma ; 
columella bordered by a callosity as in Columbella, but plaited. M, fusU 
formis, sp. n.. Pease, 1. o. p. 211, pi. 16. fig. 2, Paumotu archipelago. 
Strigatella bmunea, sp. n.. Pease, 1. c. p. 216, pi. 16. fig. 7, Poljmesia. 
Turricula modesta, sp.n., fig. 0, Turr. {Costellaria) fortiplicata, sp. n., fig. 8, 
T. (C.) plicatula, sp. n., fig. 4, T. (^Pusia) nodulosa, sp. n., fig. 6, all from Poly- 
nesia, Pease, Am. Journ. Conch, iii. pp. 212-214, pi. 16; T. (P.) putillv^ 
(Pease), figured, ibid. f. 24. 
Mitra (^Costellaria') nicobarica (Dunker), Reis. Novar.MoU. pi. 1, fig, 6,-^ 
M. microzonius (Lam.), Hakodate, Schrenck, 1. c. p. 461. 
Thala alba and angiostoma, spp. nn.. Pease, Am. Journ. Conch, iii. pp. 216, 
216, pi. 16. figs. 8 & 9, Paumotu archipelago. To the same division, which 
Mr. Pease thinks to be of generic rank, belong also Th. saltata (Pease, Proc, 
Zool. Soc. 1865) and Pleurotoma todilla (Mighels, Proc. Bost. Soc. 1846), Am. 
Journ. Conch, iii. p. 216. 
Cylindra fm'mosa, sp. n.. Pease, 1. c. p. 271, pi. 23. fig. 1, Ascension Island, 
Polynesia. 
Columbella, Two British species are introduced into this genus by Jef- 
freys, viz. C. haliceeti, sp. n,, pi. 6. fig. 6, found about 26 miles N.N.W. of 
Unst, in 86-95 fathoms ; and C. nana (Lov6n as Trit(mium,'Fox\>. &Hanl, As 
3Iangelia)-=Fusus albus (JefFr. in 1841), Shetland Islands. The former be- 
longs to that section which is characterized by the outer lip being thickened 
and furrowed inside, and the apex of the spire regularly nipple-shaped, in- 
cluding also Purpura picta (Turt.) imA Buccinum cmctum (Pidt.), both pseudo- 
British. The latter has the outer lip thin and smooth, and the apex irre- 
