Manchester Memoirs, Vol. h. (191 1), No. *J3. 13 



the locality and size, probably to the same species as the 

 specimen sent to me. 



Consequentl)', according to the International Com- 

 mission's Art. 27, which says, "The Law of Priority 

 obtains, and consequently the oldest available name is 

 retained : when any part of an animal is named before 

 the animal itself" — the correct name of the specimen is 

 Osteocella septentrionalis. 



My summarised description of Osteocella septentrionalis^ 

 Gray, then is as follows : — 



Large Pennatulids attaining to a total length of over 

 two metres. 



Rachis at least twice the length of the stalk, 



Pinnce arranged " en echelon " on the sides of the 

 rachis, each composed of about twelve autozooids, 

 bound together by fleshy webs between their 

 non-contractile calicular parts. Each pinna 

 slightly overlaps the pinna immediately above it. 

 There are no spicules in the tentacles of the 

 autozooids, nor in the pinnae nor in the other 

 parts of the rachis. 



SipJiono;::ooids between the pinnae, and in four or five 

 longitudinal rows on each side of the dorsal 

 smooth track. Siphonozooids also present in 

 three or four rows on the sides of the upper part 

 of the stalk. 



Stalk smooth, with a large bulbous swelling, with 

 scattered oblong spicules, about 'oS x "03 mm. in 

 size. 



Axis of great length, very hard, round in section, and 

 exhibiting concentric rings of growth. 



