298 Messrs. J. C. Melvill and R. Standen on 
tumidi, perleves, hyalini, ceteris apud suturas anguste canalicu- 
latis, supra, juxta suturas simul ac infra, spiraliter liratis, inter- 
stitiis utrinque arcte gemmulatis, deinde superficie media nitida, 
irregulariter longitudinaliter oblique striata, ultimo anfractu circa 
peripheriam acuticarinato, carina utrinque plano-marginata, infra, 
basim versus, spiraliter unilirato, dein superficie intermedia longi- 
tudinaliter rudicrenata, circa umbilicum ipsum duobus gemmu- 
larum ordinibus instructa, umbilico pulchre scalari; apertura 
trigonali, labro tenui, umbilicum nequaquam obtegente. 
Alt. 3, diam. 6 mm. (spec. maj.). 
Hab. Gulf of Oman, lat. 24° 58’ N., long. 56° 54’ E., 
156 fathoms. 
A great many examples, but no live specimens occurred, 
and but few in perfect condition. Allied to S. owytropis, 
A. Ad., in form, but not in sculpture. 
Fluzina Dalliana, sp. n. (Pl. XXI. fig. 2.) 
F. testa perminuta, albo-hyalina, immaculata, depresso-discoidali, 
umbilicata; anfractibus 4, quorum apicalis globosus, mamillatus, 
subimmersus, ceteris ad suturas canaliculatis, ventricosulis, 
levissimis, ultimo ad peripheriam acuticarinato, carina marginata, 
sub lente elegantissime et minutissime crenellifera, basi convexi- 
uscula, circa regionem umbilicarem paullum excavata, umbilico 
angusto, sed profundo, scalari, margine acuto, simplici; apertura 
subquadrata, columella recta, supra umbilicum triangulatim 
reflexa. 
Alt. °75, diam. 1°50 mm. (sp. min.). 
”? 1, 9 2 2 (sp. maj.). 
Hab. Gulf of Oman, lat. 24° 58’ N., long. 56° 54’ H., at 
156 fathoms. 
One of the most minute of recent shells; it agrees, how- 
ever, in many particulars with Mlueina discula, Dall*, 
dredged in the ‘ Blake’ Expedition off Dominica, W.I., at 
982 fathoms. This, however, is nearly five times as large 
as our species, which was very rare in the above station. 
We venture to dedicate this very interesting addition to 
the Oriental fauna to Dr. W. H. Dall, of Washington, 
who has done perhaps more than any other author to eluci- 
date the benthal Molluscan fauna, and is the founder of the 
genus Fluaxina. 
Homalaxis cornu-Ammonis, sp.n. (PI XXI. fig. 4.) 
H. testa minuta, alba, omnino eyoluta, delicata, depressulo-discoi- 
dali; anfractibus quatuor, quorum duo apicales connexi, vitrei, 
* Bull. Mus. Comp. Zool, Harvard College, vol. xviii. p. 273 (1889), 
