146 I.OL1GO. 



L. PULCHRA, Blainv. PL 54, figs. 165-167. 



This species attains the length of 3 inches and is supposed 

 to be adult at that size. The very small size of its fins consti- 

 tutes its principal character. 



Mediterranean, Mouth of the Loire, etc. 



L. ALESSANDRINII, Verany. PI. 57, fig. 180. 



Body oblong, cylindrical, rounded behind ; fins about two-fifths 

 the length of the body, posterior, rounded ; clubs of tentacles 

 with large external suckers and very small middle ones. Shell 

 not observed. Length, about 3 inches. 



Differs from L. pulchra by its rounded fins. " 



Messina. 



L. MENEGHINII, Verany. PI. 57, fig. 181. 



Body oblong, acuminated behind ; fins posterior, rounded, 

 scarcely half the length of the body ; tentacles long, clubs but 

 little developed, with two rows of very small suckers. Shell not 

 observed. Length, about 3 inches. 



Differs from L. pulchra by its body acuminated behind and 

 rounded fins ; from L. Alessandrinii by the former character. 



Messina. 

 L. AFFINIS, Lafont. PI. 55, fig. 169. 



The male only, of this species is known. The narrow, cylin- 

 drical body, unequal cups of the tentacular clubs and obtusely 

 rhomboidal, large fins form its principal characters. (> to 8 inches. 



'Hay of Biscay. 

 L. MICROCEPHALA, Lafont. PI. 55, fig. 170. 



Head very small, scarcely more than half the diameter of the 

 body, eyes moderate, fins long, obtusely rhomboidal ; clubs with 

 five pairs of large cups and numerous smaller ones. 



Attains a length of 2 feet. 



Bay of Biscay. 



L. BREVTCEPS, Steenstrup. PI. 55, fig. 16S. 



Differs from L. vulgaris by its shorter arms and smaller head. 

 It is the northern form of that species. Length of body, 1 foot ; 

 of tentacles, 6 inches. The dentition is the same in both species. 



This appears to me to be very like L. microcephala. 



German Ocean; Baltic Sea. 



