VERMETUS. 177 



obsolete longitudinal lirae, and still more obsolete intermediate 

 striae, incremental striae membranaceous ; aperture circular, diam. 

 about 4 mill. Philippines. 



Shell very like the preceding. 



Morch adds vars. LTLACINA, PLANORBOIDES, LAQUEARIS, RUGOSO- 



SQUAMOSA, STRIGATA,PAPILLOSA, CORALLIOPIIILA, TRIQUETRA, GRAN- 

 IFERA,FULGURATA,PUNCTATA, VARTEGATA, FLOS-LACTIS. According 



to Yaillant Lamarck's V. eruca, from examination of the speci- 

 men, is the same and should have priority. 



V. GOREENSIS, Gmelin. PL 51, fig. 47. 



Conglomerated, rounded, cancellated, yellowish, corneous 

 within, with close longitudinal elevated striae. L. of tube 8-9 

 inches, diam. 6-8 mill. Operculum so small as to be hardly 

 perceptible, not over a quarter of a millimetre in diameter. 



W. Africa. 



I ' figured Species. 



Y. EXSERTA, Dall. West Indies. 



Y. CONSTRICTOR, Morch. Australia. 



Y. SUTILTS, and vars. MAJOR and TRIQUETRA, Morch. 



Panama to Mazatlan. 



Y. IONICA, Danillo and Sandri. Dalmatia. 



Y. GREGARTA, Monts. Sicily. 



Y. PANORMITANUS, Gregorio. Sicily. 



Y. COMPACTA, Carp. Vancouver's Island. 



Subgenus SPIROGLYPHUS, Daudin, 1800. 



Y. SPIRULIFORMIS, De Serres. PI. 51, figs. 48, 49. 



Spiruliform, brownish or ash colored, or white, sometimes fas- 

 ciated, the last whorl detached but continuing spiral, smooth or 

 with growth-striae. Diam. 1 inch. 



Zanzibar, Philippines, Red Sea. 



Morch describes vars. SCAPHITOIDES, VORTEX, LEMNISCATA, SPI- 



RALIS, SOLIDISSIMA, TMMERSA (fig. 49), ERYTHR^ENSIS, DTSCULUS. 



Y. AMMONITIFORMIS, De Serres. PL 52, fig. 54. 



Planorbiform, last whorl closely wound like the others, with 

 strong incremental striae. Diam. 20 mill. 



Indian Ocean, on Perna isognomon. 

 12 



