DESCRIPTIONS OF SIXTY-EIGHT NEW SHELLS. 91 



SOLARIELLA ZACALLES*, sp. n. (PI. A. fig. 12.) 



S. testa depresso-conica, profunde et late umbilicata, pernitida, laevi, solida, 

 leete, rufo-brunnea, flammis fulgetrinis maculisque spiralibus hie illic 

 depicta ; anfractibus 6, quorum apicales If crystallini, lasves, ca3teris ventri- 

 cosulis, supra, juxta suturas, regulariter spiraliter gemmatis, dein con- 

 centrice tenuiliratis, interstitis perleevibus, ultimo infra peripheriam nitido 

 lsevissimo, intus umbilicum pulchre multilirato, liris arete gemmato-crenu- 

 latis, circa umbilicum ipsum radiatim breviter multisulculoso ; apertura 

 obliqua, subrotunda, intus margaritacea, labro tenui, columella simplici, 

 nequaquam reflexa. 

 Alt. 4, diam. 9 mm. 



Hab. Persian Gulf ; Gulf of Oman, Maskat, 10—45 fathoms ;also in lat. 24° 

 55' N., long. 57 u 59' E„ 37 fathoms, sand and mud, and lat. 24° 58' N., long. 

 56 c 54' E„ 156 fathoms. 



We at first considered this species (and so inserted it in our Catalogue f) as 

 identical with Minolta gilvosplendens, Melv., from the Philippines % ; but, 

 though extremely similar, there exist some very salient points of distinction. 

 The latter is far more conical and the body-whorl obscurely bicarinate at the 

 periphery, the umbilical sculpture in both being identical, this sculpture being, 

 in fact, the chief point of difference between the species under discussion and 

 Solariella radiata, Phil., from the Agulhas Bank, which is perfectly smooth and 

 simple as regards its umbilical region. 



The species of Solariella and Minolta are in great confusion, and monographs 

 of these two genera are much wanted. The Rev. Dr. Gwatkin is devoting 

 much time to the anatomy of the various forms, and finds many vital differen- 

 ces in the radula of some whose shells are nearly allied. We trust he may be 

 induced some day to publish the results of his researches. 



CALLIOSTOMA THRINCOMA& sp. n. (PI. fig. A. 13.) 



C. testa conico-pyramidali, imperforata, solida, sculpturata, pallide strami- 

 nea, spiraliter fusco-maculata, vel unicolore ; anfractibus octo, apicali 

 vitreo, globulari, cseteris stramineis, ad suturas impressis, tegulatis, spira- 

 liter undique pulcherrime granoso-liratis, supra, juxta suturas, carina pro- 

 minula decoratis, ultimo anfractu ad peripheriam bicarinato ; apertura 

 quadrata, margine columellari triangulatim incrassato. 



Alt. 11, diam. 9 mm. 

 Hab. Persian Gulf ; Gulf of Oman, near Masket, lat. 23° 30' N., long. 57° 



50' E., 88 fathoms. 



Near C. similare. Reeve. A highly chased and sculptured species, though of 



small dimensions, and conspicuously keeled around every whorl just above the 



suture, the last whorl at the periphery being bicarinate. 



* ^aicaXXns, extremely beautiful. 



f Proc. Zool. Soc. 1901, vol. ii., p. 349. 



J Journ. of Couch, vi., p. 407, pi. ii., fig. 8 (1801). O/n'-yxw.aa, a battlement. 



