8 LOU<;O. 



L. REYNAUDII, Fer. and Orb. PL 57, fig. ls-2. 



Body cylindrical, acuminate behind; fins more than two- 

 thirds the length of the body, obtusely rhomboidal ; sessile anus 

 short, unequal, second, third and fourth pairs externally cari- 

 nated, cups with acute teeth on higher side, diminishing in size to 

 the other side ; tentacles large, cylindrical, the suckers very un- 

 equal, ten or twelve middle ones very large, with smooth rings. 

 the smaller lateral ones oblique, with acute teeth. Shell narrow. 



Closely allied to L. vulgar/*. 



Cape of Good Hope. 

 L. TRICARINATA, Gray. 



Animal not observed. Shell lanceolate, central groove deep ; 

 blade with a slight raised ridge from the apex to the front part 

 of the outer edge, near the commencement of the shoulder, pro- 

 ducing three distinct keels on the convex side of the tip; upper 

 part of stem one-fifth of the length. Length, 16 inches. 



Me of France. 



Differs from all other shells of the genus by its large size, and 

 the oblique groove from the -tip to the upper margin. Not 

 figured. 



L. AUSTRALIS, Gray. 



Body oblong, subcylindrical ; Tins rhombic, half the length of 

 the bod} T ; tentacular arms with many moderate-sized cups dis- 

 posed in four rows, and with numerous smaller cups forming 

 four rows at the tip. Shell broad, lanceolate, blackish-brown ; 



upper end rather broad. Not figured. 



Australia. 



* * Shell lanciform, with narrow, straight-margined wings. 



L. PLEI, Blainv. PI. 57, li.i^. 183, is 4. 



IJody very narrowly elongate, attenuate toward the end; tins 

 rhomboidal. two-fifths the length of the body ; sessile arms very 

 short, the oblique suckers with toothless rings; tentacles rather 

 short with small clubs covered with unequal cups, rings of tin- 

 largest ones smooth and toothless, of the smaller ones with 

 acute points, of the small side cups verv oblique with long teeth 

 on the higher side. Shell elongate, very narrow, with three 

 longitudinal grooves. 



