555 



ductis in lobos triangulares depressos, oculis ad eorum basin 

 externam. Pallium parte exteriore incrassata, tuberculis tribus 

 instructs, parte interna tenui, subulata, in sutura spirse disposita. 

 Pes brevis, linearis, antice truncatus. 



Testa cylindrica vel fusiformi ; spira manifesta, apice papillato ; 

 sutura canaliculata ; columella callosa, uniphcata. 



Head subtrigonal, broad, anteriorly rounded, the sides pro- 

 duced into depressed triangular lobes, with the eyes at their outer 

 base. Mantle with the outer part thickened and furnished with 

 three tubercles ; inner part thin, subulate, concealed in the channel 

 of the spire. Foot short, linear, anteriorly truncated. 



Shell cylindrical or fusiform, spire conspicuous, apex papillated, 

 suture channelled, columella callous, with a single plait. 



Bulliua, Blainv. Buttina, sp., Macgill. Tornatella, sp., Kiener. 

 Buttina, sp., Say. Tab. I. Pig. 6, animal ; fig. 7, shell. 



Genus 5. Utiuculus, Brown. (Shells, sp. 27-31. pi. cxx. 

 f. 19-23.) 



Animal testa rcconditum, crassum, latum. Caput latum, breve, 

 transversum ; vibracula brevia, cornea, remota, lateralia ; oculi 

 postici, minuti, immersi, remoti; labia tumida buccam formant 

 iuflatam, verticalem, antice impressam, medio os prrebentem minu- 

 tum. Solea testa brevior, subcpiadrata, antice dilatata, truncata, 

 postice fissura media in lobos duos divisa. Margo pallii leviter 

 incrassatus, aperturam lambens. 



Testa bullacea, tenuis, ovata ; apex truncatus ; spira depressa. 



Animal contained within the shell, thick, wide. Head wide, 

 short, transverse ; tentacles short, conical, wide apart, lateral ; 

 eyes posterior, minute, immersed, wide apart ; lips tumid, forming 

 an inflated mouth, impressed anteriorly. Poot shorter than the 

 shell, sub(|uadi'ate, anteriorly dilated, truncated, divided pos- 

 teriorly by a median fissure into two lobes. Margin of the mantle 

 slightly thickened, adhering to the aperture. 



Shell small, oblong-ovate ; outer lip nearly the whole length of 

 the last whorl, and entire ; spire very short, volutions prominent. 



Ampliisphyra, Loven. Diapkana, Brown. 



Genus 6. Akeea, Muller. (Animal, pi. cxix. f. 4. Shells, 

 Bulla, sp. 32-37. pi. cxxi. f. 40-46.) 



Animal. — Caput elongatum, antice latum, bilobatum, postice an- 

 gustatum. Oculi nulli. Suturam spirae depressa? canaliculatum 

 explet pallium, connatum, cirrum emittens longum, tenuem, fili- 



4 c 



