MECKELIA. 27 



white lips, and a deep fissure on each side; subcervical aperture 

 elliptical. Length 2" ; breadth 3'". 



Plate II. 



Hab. The sea-shore. 



Obs. The lateral fasciae are not marginal. The character is taken 

 from a very fine specimen, but in others the fasciae were obscurely 

 marked. 



(a) Falmouth, W. C. Cocks, 



(b) Falmouth, W. C. Cocks. 



(c) Falmouth. 



6. L. viridis, slender, linear-elongate, narrowed behind, of a uniform 

 green colour paler beneath ; head distinct, spathulate ; subcervical 

 aperture longitudinal. Length 7-8"; breadth 1'". 



Gordius minor viridis, Dalyell, Pow. Great, ii. 72. pi. 9. f. 2-7- 

 Hab. "Under stones on the shore within the flowing tide," Dalyell. 

 {a) Falmouth, W. C. Cocks. 



7. L. albus, flattened, linear-elongate, rather acute at both ends, the 

 head spathulate, with a groove on each side ; of a very pale carna- 

 tion or white. Length 3" ; breadth 2'". 



Gordius albus, Dalyell, Pow. Creat. ii. 75. pi. 9. f. 12, 13. 

 Hab. Coast of Scotland, rare, Dalyell. 



Obs. There is a slight red speckling on the upper surface of the 

 head, but there are no eyes. This and the preceding species are 

 Omatopleans in habit, but they possess the technical character of 

 Lineus. 



19. MECKELIA. 



Meckelia, Leuckart, 1828, sec. Agassiz, Nam. Zool. Verm. 8. 

 Carinella, Johnston in Loud. Mag. Nat. Hist. vi. 232 (1833). 



Char. Body linear-elongate, narrowed posteriorly, flattened, 

 smooth ; the head continuous with the body, indistinctly defined, 

 obtusely triangulate, with a shallow fissure on each side : mouth 

 inferior, subterminal : eyes none : anus terminal ? 



1. M. anmilata, of a hyacinth-red colour, with four white lines, 

 one down the middle of the dorsal and ventral surfaces, and one 

 along each side, crossed with numerous lines of the same colour, 

 which encircle the body, and mark the number of its segments ; 

 sides speckled with white dots ; mouth margined with white. 

 Length 12-30" ; breadth 2'". 



Gordius anmilatus, Montagu in Linn. Trans, vii. 74. Turt. Brit. 

 Faun. 130. Penn. Brit. Zool. iv. 73 (1812). 



