rossia. 223 



in proportion to the body. Their extremities are lance- 

 olate, crested above, and bear on their under surface, very 

 numerous rows of minute suckers. 



The dimensions of the specimen taken by Dr. Jacob are 

 in inches ; length of the body, 2*1 ; breadth over fins, 2 - 7 ; 

 length of head, 07 ; length of tentacula, o - 7 ; length of 

 third and longest pair of arms, 2 # 6 ; length of first and 

 shortest pair, 2*2. 



Besides the Dublin Bay locality, Mr. William Thomp- 

 son procured this pretty species from the coast of the 

 north of Ireland, and in a specimen submitted to us for 

 examination, we could find no characters by which to 

 distinguish it from the Mediterranean macrosoma. 



The colour of that animal is described by Verany as 

 being of a general wine-rose hue, clouded with bluish and 

 yellowish tints, on its upper surface, and livid rose on its 

 under. The eyes are strongly tinted with blue, and 

 shine with very vivid green and silver reflections. Above 

 it is marked with irregular red specks, which are more 

 scattered below, and there are few or none on the edges of 

 the fins and funnel. The ink is black. The pen is linear, 

 lanceolate, and slightly spatulate in its lower half. 



B.. Owenii, Ball. 



Suckers in the arms large, pearl-like, unequal. 

 Plate SSS, fig. 1. 



Rossia Owenii, Ball, Proc. Royal Irish Acad. vol. ii. p. 193. — Thompson, Rep. 

 Brit. Assoc. 1843, p. 248. — D'Orbigny, Moll. Viv. et Foss. 

 vol. i. p. 2.59. — Loven, Index Moll. Scand. p. 3. 



This fine and rare species was first obtained by Dr. 

 Ball, in 1839, from a fisherman who had found it in a 



