from the Persian Gulf, &c. 7 



white, four-whorled, 1£ being apical, bulbous ; the umbilicus 

 is straight-walled, deep, solarioid, but the margin, as also in 

 Fluxina, is not crenulate j the surface above is closely con- 

 centrically shagreened and dotted, the periphery acutely 

 keeled, upper whorls very slightly depressedly conical. Below, 

 though imperfect, signs of a lingulate columellar callus can 

 be discerned which would partially cover the umbilicus. 

 This shell is now placed in Ethalia only tentatively ; and 

 I have, since description, found an imperfect, but beautifully 

 sculptured specimen of probably the same species in shell- 

 sand from Port Darwin, N. Australia, received from Dr. J. 

 C. Cox. 



Fluxina s/enomphala*, sp. n. (PI. I. fig. 10.) 



F. testa parva, anguste umbilicata, vitrea, lactea, niaguopeiv 

 delicata, depresse conica, ad peripheriarn acutissime carinulata ; 

 anfractibus 5, apicalibus due-bus inclusis, ventricosulis, vitreis, 

 lsevibus, ceteris ad suturas canaliculars, tornatis, supra suturas 

 marginatis, ultimo aufractu circa peripberiam pulcherrime 

 denticulato, apud basin lasvi, circa umbilicum angustum radiato, 

 marginato ; apertura angusta, labro tenuissimo, margine columel- 

 lari apud umbilicum paullulum reflexo. 



Alt. 1-50, diam. 3-25 mm. 



Bab. Gulf of Oman, lat. 25° 10' N., long. 61° 34' E. ; 

 Mekran Coast ; Oharbar, 40 fathoms. 



This is the second Fluxina obtained from the Persian 

 Gulf region : the first, a smaller species, was described under 

 the name of F. dalliana f, Melv. & St., in 1903. 



There have been lately introduced by Dr. Schepman two 

 beautiful small species, dredged during the 'Siboga' ex- 

 pedition, Fl. marginata and trochiformis, Schep., and the 

 latter of these has some affinity to our shell, from which, 

 indeed, it differs in size and in the much narrower umbilicus. 

 From this circumstance the trivial name is proposed. We 

 may add, the beautifully denticulate margin is the same in 

 both species, as is the general form and sculpture. It has 

 only occurred, so far, very rarely in shell-sand. 



Rissoa (Apicularia) towmendij sp. n. (PI. I. fig. 11.) 



R. testa parva, inflata, tenuissima, alba, fragili, subrotunda ; anfracti- 

 bus ad 5, quorum duo apicales perlaeves, albi, ceteris gradatulis, 

 ad suturas mulfcum impressis, ventricosis, nitidis, longitudinaliter 

 peroblique costulatis, costis indistinctis, superficialibus, apud 



* <jTev6fi>pa\os, -with narrow umbilicus. 



t Ann. & Mag. N. H. ser. 7, vol. xii. p. 298, pi. xxi. fig. 2 (1903). 



