PEDICULARIID.E. 273 



longirostrata, Sow. sirailis, Sow. 



obtusa, Soiv. spelta, Lam. 



Pbilippinarum, Sow. subreflexa, Sow. 



recurva, Soiv. subrostrata, Sow. 



secale, Sow. volva, Linn. 



Genus SIMNIA, Risso. 



Mantle-margin simple, not tuberculated ; foot long, 

 broad, not longitudinally folded. 



Shell thin, involute, oblong, subfusiform ; aperture ex- 

 panded, contracted at both ends into short pointed canals; 

 inner lip straight, slightly twisted in front; outer lip 

 simple, acute, arcuated. 



Syn. Scymnia, Leach. Volva, Flem., not Bolt. Cal- 

 purna, Flem. 



Ex. S. patula, Pennant, pi. 29, fig. 2. Shell, S. pa- 

 tula, fig. 2, «. 



The flat foot of the animal, and the thin outer lip of 

 the shell will at once distinguish this genus from the 

 Volva of Bolten or Radius of Montfort; the margin of 

 the mantle, moreover, is simple, and not furnished with 

 tubercles. 



Species of Simnia. 



aperta, Soiv. uniplicata, Sow. 



patula, Penn. 



Fam. PEDICULARIID^. 



Lingual membrane with seven series of teeth (3"1"3), 

 the central ones hooked and denticulated, the inner 

 lateral teeth four-cusped, the second and third elongated 



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