MOLLUSC A GASTEROPODA. 435 



paper will shortly appear with figures in Guerin's Magasiu. The species 

 arc 19 in number : (a) latticed (gegittert) : N. cancellata, Lam., cidaris, 

 from the Philippines ; ligata, petitiana, Cumingiana, from the same locality ; 

 orlignyana and granulosa, from New Holland ; tuberosissima, Mont., rosea, 

 from the Molluccas ; and s/dcata, from the Antilles, (b) Shell plicated : 

 plicata, Gueriniana, and distans, from the Philippines ; hellcoidea, Le Guillou, 

 striata, D'Orbigu, acttta, and Blainvillei, from the Moluccas; lamellosa, 

 D'Orbign., yhibcrrima, from England. 



In Philippi's Abbildung. vi, the following species of Siyaretus are figured 



and described : S. maximus, Phil, (concavus, Sow.), Leachii, Blaiu., dcpressus, 



Phil., new species ; haliotideus, L., martiniantts, Pliil. (Martini, i, f. 151, 154), 



perspectives, Say, maculatus, Say, Icemyatus, Lam., planus., Phil., new species. 



Janthina pat^lla, Philippi. (Eimm. App. p. 221.) 



Philippi (Euum. p. 92) is inclined to place a new genus, Tliyreus, near 

 Pileopsis. The shell is long oval, irregular, with an irregular spire ; apex 

 obtuse, rounded, inclined backwards. From the apex radiating striae pro- 

 ceed anteriorly, posteriorly there are transverse striae ; muscular impression 

 indistinct ; a longitudinal impression on the posterior side, the upper border 

 of which projects free. The species, Th.parado.rus is milk-white. 

 Crepidula solida, Hinds (Sulphur), from California. 



The fourth part of Philippi's Abbildungeu contains Neritae : N.planospira, 

 Anton, ornata, Sowerby, picea, Recluz, and the following new ones : N. 

 peruviana, Ph., white and black, labrum with ten, columella with four teeth. 

 N. carbonaria, Ph., black, labrum without teeth, columella with five small 

 teeth, locality not stated. N. incerta, v. d. Busch, black with milk-white, 

 points, columella with four teeth Java. N. anthracina, v. d. Busch, black 

 or marbled with yellow, columella with four teeth, labium granulose Java. 

 N. costitlata, v. d. Busch, transversely sulcate, yellowish white, waved with 

 black transverse lines, spire projecting Java. N. Winteri, Ph., whitish, with 

 20 25 grooves Moluccas. N. venusta, Dunker, reddish, with two black 

 bauds (Chemu. f. 2015) Amboyua. N. aurora, Duuker, longitudinally pli- 

 cated, white, with three saffron-yellow bands locality not stated. 



Delphinula Reeviam, Hinds (Sulphur), from Malacca; D. Ctevis, Philippi 

 (Euuni. p. 146) ; D. exilissima (ib. p. 224). 



Orbis foliaceus, Philip. (Euum.): lamelliform, depressed, with numerous 

 whorls rounded at the periphery. Much resembles a Planorbis ; but is 

 marine, and is white and shining. The author places it near Delphimila. 

 Rotella sagittata, Hinds (Sidphur), from Madagascar. 

 From the group of the black Trochi, Jonas (Menke Zeitschr. p. 113) dis- 

 tinguishes ten species, among which three are new : Tr. mtestus, locality not 

 stated, euryompJialus, from the west coast of South America, and stcn- 

 ompJialus, locality unknown ; the latter, according to a subsequent remark (ib. 



