462 



Proceedings of the Royal Physical Society. 



Loligo vulgaris, Lamk. 



Two large and two small rows of 

 suckers on the tentacles, the former 

 twice as broad and three times as 

 high as the latter. 



Largest tentacular suckers two to 

 three times as large as those of third 

 sessile arm. 



Horny ring of central row of suckers 

 finely toothed only in distal half, or 

 bears only a group of four or five 

 small blunt teeth. ^ 



Suckers of lateral series have high 

 pointed teeth in the distal half, and 

 are elsewhere toothless, or with very 

 small teeth. 



Chromatophores distributed evenly 

 and not collected into bands. 



Loligo Forhesii, Stp. 



Four sub-equal rows of suckers on 

 the tentacles. 



Largest tentacular suckers scarcely 

 one -third to one -half larger than 

 largest on third sessile arm. 



Horny ring of central row of 

 suckers finely toothed all round, teeth 

 large and small alternately. 



Suckers of lateral series completely 

 set with teeth of sub - equal size, 

 though somewhat smaller on the 

 proximal half. 



Chromatophores united into broad 

 bands of colour down either side. 



XL. Caseous Tumours found in the Muscles of the Hake. By 

 G. Sims Woodhead, Esq., M.D., F.RC.P.Ed. [Plate 

 XXIIL] 



(Read 18th March 1885.) 



Dr Eamsay Traquair has placed in my hands portions of 

 the muscle of a large hake which have been forwarded to 

 him from the North of Scotland. The following is a note 

 of the appearances presented on naked eye and microscopic 

 examination. 



The specimens consist of small masses of the dorsal and 

 lateral muscles of a large hake. They are preserved in 

 methylated spirit, and for the most part are perfectly 

 bleached. On examining more carefully, it is found that 

 in the centre of the largest piece of muscle there is a 



1 On the basis of these differences L. vulgaris has been divided by Professor 

 Targioni-Tozzetti ("Comment. Cefalop. Medit."— J?wZZ. inalacol. ital, anno 

 ii., pp. 35, 36, 1869) into two species,— one found in the North Sea, for 

 which he retains the original name, and the other found in the Mediter- 

 ranean, which he terms L. mediterrama. The material in my hands is not 

 sufficient to enable me to form an opinion as to the necessity for this step : 

 Dr Paul Fischer has not approved it {Jourii. Conch., ser. 3, t. xii., p. 21, 

 1872). 



