MALLEACEA. 193 



poda, Lam. — Bescr. Equilateral, inequivalve ; one valve convex, 

 with a triangular area, divided by an angular sinus in the centre ; 

 the other valve flat, with a straight hinge line and two small 

 projections ; a partial longitudinal septum, with appendages 

 attached to the hinge within. Differing from Terebratula in 

 having a triangular disc, and not a circular perforation. Magaa 

 pumilus. Eossil in chalk. PL xi. iig. 209. 



MAGILUS. Montf. Fam. Cricostomata, Bl. Serpulacea, Lam. 

 — Descr. Thick, tubular, irregular, contorted ; rounded above, 

 keeled beneath, free ; apicial extremity convolute, heliciform, 

 ovate or sub-globose ; aperture elliptical. — Ohs. This shell when 

 in a young state presents the characteristics of a regularly formed 

 spiral univalve, living in holes in madrepores. As the madrepore 

 increases in bulk, the animal gives an eccentric course to the 

 shell, in order to have its aperture even with the surface, and 

 leaving the nucleus or young shell behind, fills it up with calca- 

 reous matter to reside in the open extremity of the tube. Eed 

 Sea and Mauritius. Campulotua is the original name for this 

 genus. PL L fig. 9, 10. 



MALACOTA. Schum. Otion. Leach. Conchodeema. 



MAJjACOZOA. bl (MaXaKo?, ma?aco5, soft ; Zwov, ^-oora, animaL) 

 The type or general appellative in De Blainville's system, in- 

 cluding all molluscous animals, excepting those with multivalve 

 shells. 



MALDANLA.. Lam. The second family of the order AnneUdes 

 Sedentaria. The only genus of shells described in this family is 

 Dentalium, fig. 2, to which may be added Pharetrium, Konig. 

 fig. 3. It is doubtful however whether the latter do not belong 

 to an unknown genus of Pteropodous MoUusca. 



MALEA. Valenciennes. A genus composed of Dolittm latila- 

 brum, Kiener, and other similar species. D. ringens, &c. 



MALENTOZOA. Bl. (MaXaKog, malacos, soft ; ev, in, refivMy 

 femno, cut ; Zuov, soon, animal.) Or articulated mollusca. The 

 sub-type in De Blainville's system, comprehending those with 

 multivalve shells. 



MALLEACEA. Lam. A family belonging to the order of Con- 



