MOLLUSCA. 65 



The species figured was captured off Java, among a mass of floating sea-weed, and, 

 from being in a languid state, the tentacles are not fully extended. 



56. DOLABELLA, Lamarck. 

 1. Dolabella EuiiPHii. PI. XV 111. Fig. 4. Lamarck, Anim.sans vert. (Deshayes' edit.) vol.vii. p. 699. 



This fine species of Dolabella was collected at Mauritius, feeding in groups of eight or 

 nine in a smaU muddy inlet of the sea. The colour of the specimens varied from dark green 

 to dirty yellow. 



57. BULLA, Klein. 



1. Bulla Coreaxica. PL XVIII. Pig. 3. Adams, Sowerby Thesaurus Conch. Bui. pi. 125. f.166. 

 Hab. Corean Archipelago. 



This species belongs to that division in which the shell is internal, and, when alive, 

 presents a quadrilobate fleshy mass without any great amount of vivacity. There are no 

 visible eyes or tentacles, and its elongated head probes with its extremity the mud-flats on 

 which the species abounds, for the small bivalves which seem to constitute its food. Some 

 of the large mud-flats among the Corean islands were covered with these shapeless mollusks, 

 and offered tempting morsels to the Grallatorial birds seen striding over the mud. 



2. Bulla vexilluh. PI. XIX. Pig. 4. Chemnitz, Conch. Cab. vol. x. pi. 146. f. 1318, 9. Bulla 

 fasciata, Bruguiere. 



Hab. Miudoro Sea, Philippine Islands. 



The animal of Bulla vexillum is of a delicate pink colour, with the head, lobes, and 

 margins of the foot edged with white, with an intramarginal dark chocolate-red border. 

 The foot is thin, nearly membranous, and very volumiuous, and, when not dilated for 

 swimming, folded up around the shell ; the inner margin of the mantle forms a thick fleshy 

 lobe, which partially fills up the hind part of the aperture of the shell ; the outer margin is 

 thin and lines the outer lip. This Bulla, so beautiful in the living state, was found in grass- 

 like sea-weed, in about a fathom water, near Ambolan, Mindoro. 



3. Bulla soluta. PI. XVIII. Fig. 2. Chemnitz, Conch. Cab. vol. x. pi. 146. f. 1359, 1361. 

 Bulla Ceylanica, Bruguiere. 



Hab. Borneo. 



The Bulla soluta, Chemn., appears to be blind, while the head is very elongated, 

 and the side lobes of the foot well developed for swimming, — which faculty, indeed, this 

 fonn enjoys in great perfection. The inner or thickened edge of the mantle sends off 



s 



