242 



L.M.B.C MEMOIRS 



No. VII. LINEUS. 



BY 



K. C. PUNNETT, B.A. 



Introduction. 



Since tlie time when it was first noticed by Pallas, in 

 1766, as " alia Lumbrici species marini tota atra," the 

 Nemertean now known as Lineus gesserensis (which we 

 choose as our type) has been the recipient of no less than 

 10 generic and 13 specific names associated together in 

 various permutations and combinations. Our knowledge 

 of the habits and anatomy of the worm are chiefly due to 

 *M'Intosh, Barrois, Hubrecht, Oudemans, and Mont- 

 gomery. Varying in size from about 6-20 cm., it is one 

 of the commonest Nemerteans of our shores, occurring 

 abundantly, and frequently in tangled masses, under 

 stones between tidemarks and in the laminarian region. 



* M'Intosh, W. C. — British Annelids, The Nemerteans, London, 1873. 



Barrois, J. — Embryologie des Nemertes, Annales des Sciences Naturelles, 

 Paris, 1877. 



Hubrecht, A. A. W. — Contributions to the Embryology of the Nemertea, 

 Quart. Journ. of Mic. Sc. 1886. 



Oudemans, A. C. — The Circulatory and Nephridial apparatus of the 

 Nemertea. Quart. Journ. Mic. Sc. Supplement, 1885. 



Montgomery, T. H. — On the Connective Tissues and Body Cavities of the 

 Nemerteans. Zoolog. Jahr. 1897. 

 ,, Studies on the elements of the Central nervous 



system of the Heteronemertini. Journal of Morpho- 

 logy. 1897. 



