NATICID^. 11 



Conriul, was referred here by me in Structural and Syst. Conch.; 

 its species having been described as Naticre ; it is now placed in 

 Lacunidae. 



Section Amplostoma, Stoliczka, 1868. 



Subovate, thin, spire short; whorls few, the last large, ventri- 

 cose, produced in front, widely excavated at base ; aperture 

 elongately ovate, subangulated, pillar lip smooth, outer lip 

 dilated and expanded at the margin ; surface nearly smooth. 

 S. auriformis, Stol., Cretaceous, So. India (S. Sc S. Conch., t. 

 Ixiv, f. 85). 



The characters are exceedingly close to those of the last 

 section. Lysis, Gabb., 1864, which I consider a member of the 

 subfamily Purpurinjc, of Muricidju, has been referred to this 

 neighborhood by Dr. Fischer. 



Subfamil}' II. Lamellariinse. 

 Genus LAMELLARIA, Montagu, 1815. 



Shell internal, ear-shaped, thin, pellucid ; spire lateral, very 

 small; aperture large, patulous, both lips regularly arcuated; 

 axis imperforate. No operculum. 



Animal much larger than the shell, which is entirely concealed 

 beneath the dorsal shield ; shield thick, verrucose, notched in 

 front; foot elongated, truncated in front, acuminated behind; 

 eyes at the outer bases of the tentacles. Dentition I'l-l, the 

 central tooth subtrigonal, with the free margin denticulated and 

 base incurved ; laterals large, the summit lanceolate, the margins 

 denticulate, no marginals (PI. 1, fig. 9). 



There are a few living species, and two species in the Miocene. 

 Interesting particulars of the habits of Lamellaria will be found 

 in Structural and Systematic Concholog}', ii, 209. 



The s^^nonymy includes Marsenia, Leach, 1841 ; Coriocella, 

 Blainv., 1824; Chelinotus, Swams., 1S40 ; Cryptocella^'S. & A. 

 Adams, 1853; JErmiea, Graj', 1857; Cryptofhyra, Menke, 1830. 

 Coriocella and Gryptocella have been considered subgenera, but 

 have no important characters ; the former was founded upon an 

 individual accidentalh' deprived of its shell. The fry, also, 

 have received several generic names (p. 5). 



