MOLLUSC A. 35 



spots ; the tentacles pure white ; the siphon elegantly annulated with alternate, broad, 

 black and white rings, the white rings being much narrower than the black ; the foot is of a 

 clear dead white, covered with large, black, somewhat scattered, oval spots. 



The Colmnbellce live in shallow water, some species crawling on the surface of sand-flats, and some 

 affecting stony beaches, where they congregate about the stones in considerable numbers. C. varia, ob- 

 served in plenty at the Island of Billiton, on a coral and stony bottom, is of a pure dead white ; the body, 

 head, and foot being covered with large, oval, black blotches, and the tentacles marked with a row of black 

 spots along their entire length. The siphon is annulated alternately with brown and white. A. A. 



16. ONISCIA, Sowerby. 



1. Oniscia exqtjisita. PI. V. Fig. 3 a, b. Onisc. testa subtrigono-ovata, basi obtuse recurva, spira. 

 brevi, acuta, anfractibus octo, superne concavo-depressis, tuberculis papillaribus undique angulatis, lira 

 subobscura interveniente, labro columellari late expanso, granulis valde irregularibus, labro externo in- 

 crassatim reflexo, Kris brevibus dentiformibus irregulariter munito ; albida, aurantio-fusco hie illic sparsim 

 punctata, et pone labrum trimaculata, labris palfide purpureo-rosaceis, apice rufo. 



Hab. Sooloo Archipelago ; outside a coral reef near the city of Sooloo, in about sixteen to twenty 

 fathoms, sandy mud. 



The surface of this very chaste and delicate Oniscia is covered with papillary tubercles, 

 in rows of about ten either way, transversely or longitudinally. The columella and outer 

 lips are enamelled of a livid purplish-pink colour. 



4. ALATA. 



17. STROMBUS, Linnaeus. 



1. Stbombus corrugatus. PI. X. Pig. 19. Stromb. testa fusiformi-turrita, anfractibus novem, 

 transversim undique creberrime liratis, superne rotundato-angulatis, ad angulum plicato-costatis, costis 

 subcorrugatis, in anfractu ultimo gradatim distantioribus et majoribus, tubercula formantibus, apertura 

 subangusta, labro columellari calloso, externo pone incrassato ; alba, fulvo-castaneo subirregulariter fasciata, 

 aperturse fauce alba. 



Hab. Korea. 



Distinguished by its corrugated ribs, which in the last whorl gradually pass into 

 tubercles, larger, and at more distant intervals. 



18. ROSTELLABIA, Lamarck. 



1. Eostellaria EECTiEOSTEis. PI. V. Pig. 2 a, b, c. Lamarck, Anim. sans vert. (Deshayes' edit.) 

 vol.ix. p. 655. 



Hab. Coast of Borneo ; dredged from black sandy mud at the depth of thirty-one fathoms. 

 Animal with a subcylindrical annular proboscis, coloured by a broad, central, dark 



