THE METAMOEPHOSIS OF BOLINA CHUNI. Nov. Spec. 



By R. von Lendenfeld, Ph.D. 



Plates XLIV.-XLV. 



The extreme delicacy of Ctenaphorse in general must in a great 

 measure be considered as the reason why so few of these Coelenterata 

 have been described from Australian waters. Nevertheless they 

 really appear to be rare. During my three years stay in the 

 colonies, a great pai't of which time was devoted to the investi- 

 gation of marine animals I have only met with two species one of 

 which was very abundant in Port Jackson. The ssvarms consist 

 apparently of Bolina and Cydippidte, but I found after I had 

 examined a great number of specimens, that the Cydippidse were 

 nothing else than the young stages of the Bolina. 



The metamorphosis of this Genus has been studied by A. Agassiz 

 (1), and Chun (2) describes the development of Eucharis multi- 

 coi'nis. In both these cases as well as in a few other species of 

 Lobatfe, the young stages are similar to Cydippe. 



The metamorphosis of our Bolina is nevertheless slightly different 

 from that of Bolina alata described by Agassiz (I.e.) 



The larvae possess for a long time a perfectly circular transverse 

 section. (Fig. 5), and are depressed neither in the Gastral nor in 

 the funnel-plane. The paddle-lines are in the young larva much 

 longer than in corresponding stages of other Lobate. The apical 

 Callert masses protrude far beyond the sense organ. 



I shall first describe the adult animal 



(1.) A. Agassiz. North American Acalephse. Illustrated Catalogue of 

 the Museum of Compai-ative Zoology. No. II, 1865. 



(2 ) C. Chun. Die Ctenophoren des Golfes von Neapel. b'auna und Flora 

 des Golfes von Neapel. Band I. 



