296 Messrs. J. C. Melvill and R. Standen on 
Solariella radiata, Phil., from the Agulhas Bank, which is 
perfectly smooth and simple as regards its umbilical region. 
The species of Solartella and Minolia are in great con- 
fusion, 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 
differences 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. (Pl. XX. fig. 13.) 
C. testa conico-pyramidali, imperforata, solida, sculpturata, pallide 
straminea, spiraliter fusco-maculata, vel unicolore ; anfractibus 
octo, apicali vitreo, globulari, cacteris stramineis, ad suturas im- 
pressis, tegulatis, spiraliter undique pulcherrime granoso-liratis, 
supra, juxta suturas, carina prominula decoratis, ultimo anfractu 
ad peripheriam bicarinato; apertura quadrata, margine colu- 
mellari triangulatim incrassato. 
Alt. 11, diam. 9 mm. 
Hab. Persian Gulf; Gulf of Oman, near Maskat, lat. 
23° 30/ N., long. 57° 50’ E., 88 fathoms. 
Near C. stmdlare, Reeve. A highly chased and sculptured 
species, though of small dimensions, and conspicuously 
keeled around every whorl just above the sutnre, the last 
whorl at the periphery being bicarinate. 
Leptothyra rubens, sp.n. (Pl. XX. fig. 14.) 
L. testa globosa, parva, imperforata, solida, nitidula, infra levissima, 
pallide straminea, flammis castaneis decorata; anfractibus 4-5, 
quorum 13 apicales apice ipso vitreo-albo, mamillato, ceteris 
gradatulis (ultimo rotundiore), undique infra medium leyibus, 
nitidis, supra arcte spiraliter sulculosis, ultimo ad peripheriam 
pallide spiraliter zonato, infra ad basim pulchre rubente; aper- 
tura rotunda, labro vix incrassato, nisi marginem apud columel- 
larem albo-callosum, nitidum. 
Alt. 4, diam. 4°50 mm. 
Hab. Gulf of Oman, lat. 24° 58’ N., long. 56° 54’ E., 
156 fathoms. * 
A highly coloured little shell, which occurred somewhat 
plentifully at the above locality. The many specimens we 
have seen agree in sculpture and coloration almost uniformly. 
Near L. leta, Montr. 
Trichotropts pulcherrima, sp.n. (Pl. XX. fig. 15.) 
T. testa tenui, supra pergracili, attenuato-fusiformi, alba vel stra- 
minea, ochracea epidermide contecta; anfractibus octo, quorum 
* Opiyxopa, a battlement. 
