178 



LORIPEDES. 



Lam, and contains the genera Lituola, Ichthyosarcolites, Spirula, 

 Hamites and Ammonoceras. 

 LITUACEA. Lam. A family of the order Poly thalamous Cephalo- 

 poda, Lam. containing the genus Spirula, fig. 471. 

 LITUITUS. Montf. Spirolina, Lam. Microscopic. 

 LITUOLA. Lam. A genus of microscopic Foraminifera. 

 LITUOLA. Lam. The third family of Polythalamous Cephalo- 

 poda, Lam. the shells of which are described as partially spiral, 

 the last whorl continuing in a straight line. The transverse septa 

 which divide the chambers, are in general pierced by a siphon 

 which breaks itself off before it reaches the succeeding septum. 

 This family contains the genera of microscopic Foraminifera 

 Lituola and Spirolina. The genus Spirula, also placed in this 

 family, does not by any means agree with Lamarck's definitions 

 "the last whorl continuing in a straight line." 

 LITUUS. Humph. Cyclostoma ? Lam. 



LIVID. (From lividus.) Of a pale, dull, blue colour. The adjec- 

 tive is sometimes used as a specific name. Ex. Conus lividus, 

 Sanguinolaria livida. 

 LOBARIA. Schum. Sanguinolaria rosea, Lam. (fig. 98) and 



other similar species. 

 LOBATE or LOBED. Divided into parts. 



LOBATULA. Fleming. A genus composed of two very minute 

 species of chambered shells. Serpula lobata and S. concamerata, 

 Mont. Test. Brit. 515. 

 LOMASTOMA. Rafinesque. An imperfectly defined genus, pro- 

 bably belonging to the Limnacea. 

 LONGITUDINAL. Lengthwise. Longitudinal strite, ribs, &c. 

 are those which radiate from the apex and follow the spiral 

 direction of the whorls, in spiral shells ; and from the umbo to 

 the ventral margin in bivalves. The term " decourantes" is 

 employed by French conch ologists. The bands in Achatina, fig. 

 286, are longitudinal or spiral. 

 LORIPEDES. Poli. A genus composed of species of Lucina, Auct. 

 in which the lunules are not prominent. 



