HOYLE : BRITISH CEPHALOPODA. 



On consideration of the evidence, I am inclined to agree with Dr. 

 Jatta ['96, p. 160] that S. nippellaria must be regarded as a synonym 

 of this. The latter name was founded only on a shell, which is cer- 

 tainly extremely like that of .i'. ele^i^nns. There is a confusion regarding 

 this species in Dr. Norman's " Revision" ['90, p. 4S4] ; the first re- 

 ference is correctly to d'Orbigny's Sepia ekgans, which Norman calls 

 S. rupellaria, but the citation from Jeffreys ['69, p. 140] refers to 6'. 

 elegans of de Blainville, as understood by Verany, which, as above 

 shown, is a synonym oi S.orbignyana Fe'russac. 



The name S. biserialis of Montfort, adopted by Jeffreys, seems to 

 have been merely a MS. name until adopted by Ve'rany ['51, p. 73], 

 hence the name given by d'Orbigny [Fer. & d'Orb", '35, pi. 8, figs. 

 1-5], in 1826, takes precedence. 



Sepiola scandica. — This is the form commonly referred to by 

 British naturalists as ^. roiideleti. It is distinguished by possessing a 

 simple pyriform ink-sac, whereas that of the Mediterranean species is 

 trilobed or eared. 



Sepiola atlantica.— Jeffreys' remark ['69, p. 137] that this is the 

 male of S. roiideleti can only have arisen from a complete misconcep- 

 tion of the points of sexual dimorphism in the Cephalopoda. 



Rossia glaucopsis. — I have elsewhere ['86, p. 117] given the 

 reasons for regarding Jeffreys' R. papillifera as a synonym of this: the 

 identification rests on a comparison of Jeffreys' type with authentically 

 named Scandinavian examples. I entertain no doubt that R. siibkvis 

 Verrill is a synonym of this species. Norman only included it in his 

 list with great misgiving. 



Mn^rhifpt; ( ^ \\2M& elsewhere [:0l] shown reason for using these 



names in place of the well-known Octopus and Eledone. They were 

 proposed and accurately defined by Schneider so long ago as 1784, 

 and have most unaccountably escaped notice. 



Key for the Determination of British 

 Cephalopoda. 



The accompanying key will, it is thought, serve for the identifica- 

 tion of all British Cephalopoda ; so far as practicable the characters 

 are such as can be made out either from external inspection alone, or 

 with a minimum of dissection, and no characters -have been used 

 which are dependent on sex. In the genus Sepiola, for example, it 

 is necessary to cut open the mantle just to one side of the ventral 

 median line ; the ink-sac will then generally be visible through the 

 tissues, if not the integument must be carefully removed until its out- 

 line can be made out. The distinctive characters of a few forms not 

 yet certainly recorded as British have been added. 



