184 MANUAL OF THE MOLLUSCA. 



small, black, sessile at the inner bases of the tentacles ; lingual teetli {B. 

 physis) 13.0.13, serrated. 



Bistr. 10 sp. U. States, W. Indies, Mauritius, Ceylon, China, Australia. 



Scaphander, Montfort. 



Type, S. lignarius, PI. XIV. fig. 12. Etym. Scaphe boat, aner, man. 



Shell oblong, convolute ; spirally striated; aperture much expanded in 

 front; spire concealed ; epidermis thick ; lingual teeth 1.0.1. crested. 



Animal with a large oblong head, destitute of eyes; foot short and 

 broad ; lateral lobes reflected, but not enveloping the shell ; gizzard of two 

 large trigonal plates and a small narrow transverse plate (fig. 17). 



Distr. 5 sp. U. States, Norway, Brit. Medit. on sandy ground; 50 fms. 



Fossil, 8 sp. Eocene — . Brit. France. 



^, 



<-^ 



Fig. 104. Bullcea aperta.* 

 BuLL^A, Lamarck.f 



Type, B. aperta, PI. XIV. fig. 13. 



Shell internal, white, translucent, oval, slightly convoluted, spire rudi- 

 mentary. 



Animal pale, slug-like ; mantle investing the shell ; head oblong ; eye- 

 less ; foot broad ; lateral lobes large, but not enveloping ; tongue with 2 or 

 4 series of sickle-shaped tmcini ; gizzard with 3 longitudinal shelly plates. 

 Egg capsules ovate, in single series on a long spiral thread ; fry with a cUiated 

 head-veil and an operculated, spiral shell, {Loven). 



Distr. 10 sp. W. Indies, Greenland, Norway, Britain, INIedit. Corea, 

 Borneo. Fossil, Eocene — . Prance. 



Sub-genus, Chelidonura, A. Adams, (Hirundella, Gray) B. hirundinaria, 

 Quoy, Mauritius. Shell concealed; outer lip produced posteriorly into a 

 spur ; columellar border inflected. Animal with enveloping side lobes ; 

 mantle with two appendages behind, like the lateral processes of Hyalaea. 



DoRiDiUM, Meckel, 

 diminutive of Boris. Syn. Accra, Cuv. Eidothea, Risso. 



* From a specimen dredged at Folkstone; o, mouth, c, head, or cephalic disk, 

 /, side-lobes of the foot, m, mantle, The shell s, and gizzard g, are indistinctly seen 

 through the translucent integuments. 



t Gray adopts the pre-Linnean name Philine (Ascanius, 1762), and D'Orhigny the 

 still older Lobaria, (Miiller, 1741), names given to particular species, and not to 

 genera as now understood. 



