136 
REPORT ON ZOOLOGY, MDCCCXLII : 
apertur arotundato-compressa : Gulf of Cagliari. Z>. tyria, from New 
Holland, imperialis, incisa, formosa, and aculeata, from the Philip- 
pines, have been described by Lovell Reeve, Proc. p. 102. D. tuhercu- 
Iq^sa, D’Orb. (Cuba), has six knobbed cross ribs, and four whorls. 
Rotella semistriata, D’Orb. (Cuba), whitish, with vertical stripes 
superiorly ; beneath smooth, transparent. R. diaphana, id. ; like the 
preceding, but without stripes ; probably R. pusilla, Pfr. R. carinata, 
id. ; keeled ; in other respects like preceding. R. striata, id. ; striped 
longitudinally, with open umbilicus. R. anomala, id. ; smooth, keeled, 
with open umbilicus. 
D’Orbigny (Cuba) divides the genus Solarium into two divisions. 
The Solaria proper have a depressed operculmn with few whorls ; 
interiorly with an elevated protuberance ; the others {Heliacus) have a 
spiral conical operculum. To the latter division belongs Sol. Heherti, 
Desh. ; Sol. Philippii, Cantr. ; Bull. Brux. ix. 2, p. 344 {Valvata 
striata, Phil.) : Sardinia. S. hisulcatum, D’Orb. (Cub.) ; two ribs on 
the periphery ; above them five, beneath them six cross-ribs. S. del- 
phinuloides, id. ; cross-ribbed, white ; trochiform. S. inornatum ; 
frangible, smooth, with a light keel. 
Lovell Reeve has laid before the Zoological Society seven species of 
the genus Phor^is, Montf, amongst which four are new ; Ph. exustus, 
calculiferus, pallidulus, and corrugatus (Proc. p. 160). All of them 
are figured in his Conchologia Systematica. 
Clanculus Blainvillii, Cantr., Bull. Brux. ix. 2. p. 344 ; testa orbicu- 
lato-conoidea, umbilicata, nitida, laevi, albicante, lineis obliquis,plerumque 
angulatis, purpureo-lividis qjicta ; anfr. 5 convexis, sutura simplice dis- 
tinctis, ultimo depresso, umbilico mediocri, spirato, non crenato, albo ; 
apertura ovato-depressa ; labro intus sulcato, columella supra unidentato- 
plicata, infra subunidentata aut trituberculata ; Tripoli. 
Trochus asteriscus, gemmosus, hanleyanus, modestus : habitat of all 
unknown; eximius, from Payana; melanostoma, from New Holland, 
are figured in the Conchologia Systematica of Lovell Reeve (Proc. p. 
184). T. hotesserianus, D’Orb. (Cuba), circular; umbilicated, with two 
lateral elevated stripes ; variegated white, black, and red ; columella with 
one tooth. T. canaliculatus, id. ; circular, keeled, whitish, spotted wavy 
broAvn, umbilicated ; one tooth on the columella. 
Lacuna glacialis, Moller, 1. c. ; testa ovato-conica, rufo-fusca, anfr. 
,5 cylindraceis, plicis membranaceis angustis, cinereis, confertis or- 
natis. 
Margarita glauca, Moller, 1. c. ; testa conoidea, laevi, opaca, albido- 
livida, umbilico mediocri, anfr. 4 cylindraceis, sursum crescentibus. 
M. Vahlii, id. ib. ; testa conoidea, hyalina, nitida, margaritacea, umbi- 
lico angusto ; anfr. 4-4J cylindraceis sursum crescentibus. M. (?) 
costulata, id. ib. ; t^sta minuta, depresse globosa, lutea anfr, 3 sursum 
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