193 



9. Loligo media, var. It approaches the form of sagit- 

 tata in the termination of its visceral sac. 



10. Loligo Eblanae. Ofthe former paper. Obtained byT.W. 

 Warren, Esq., in 1836; and other specimens of greater beauty 

 and larger size obtained in the bays of Belfast and DubHn by 

 W. Thompson, Esq., and Mr. Ball. As it now appears that 

 the animal possesses both eyelids and a lacrymal sinus, cha- 

 racters not ascribed to the genus Loligo, it may require to 

 be placed in another genus. 



11. Eledoneventricosa. Youghal, 1820, and Dublin. A 

 very fine specimen was found by Mrs. Lyle at Kingstown. 



12. Octopus vulgaris. Plymouth, 1841. Mr. Ball. 



13. Sepiola Rondeletii. Youghal, 1819. Dublin, 1829. 

 Mr. Ball. 



14. Rossia Owenii. Was obtained in 1839 by Mr. Ball, 

 from a fishwoman who had found it in a Dublin bay fishing 

 boat. It is remarkable for the great size and distinctness 

 of its acetabula, which are placed on long peduncles, and may 

 be compared to the pearls in a diadem : they are ranged in 

 three rows, those of the centre row being not more than half 

 the diamater of those on each side ; on the first pair of arms 

 the acetabula are more numerous, more equal in size, and 

 smaller than on the others. The specific name has been given 

 in honour of R. Owen, Esq., the founder ofthe genus Rossia. 



15. Rossia Jacobii. Was obtained from the same woman 

 as the foregoing, in 1840, by A.Jacob, Esq., M.D., who 

 kindly sent it to Mr. Ball. It is much larger, but differs 

 considerably in its proportions from Rossia Owenii ; its ace- 

 tabula are smaller; its arms proportionably shorter; the 

 membrane round the mouth forms a hexagonal figure, from 

 each angle of which a ridge runs, which is decurrent in six 

 cases ; on the second, third, and fourth pair of arms, and in 

 the seventh the ridge passes upon the web between the first 

 pair of arms, where it bifurcates, and runs out on each side. 

 Its specific name is given in honour of Dr. Jacob, from 



