B'CUi394 



On Julinia; a New Genus of Compound 

 Ascidians from the Antarctic Ocean. 



By 



W. T. Caiman, 



University College, Dundee. 



With Plates 1—3. 



The Ascidian described in the present paper was collected 

 in the Antarctic Ocean by Dr. C. M. Donald, of the whaler 

 " Active," during the Dundee Whaling Expedition of 1892-93, 

 and was placed along with other specimens in Professor 

 D'Arcy W. Thompson's hands. Its large size and remarkable 

 appearance attracted attention, and closer examination sug- 

 gested its possible identity with the species described by 

 Professor Herdman in his report on the Compound Ascidians 

 of the Challenger Expedition ('Chall. Eep.,^ vol. xiv, pp 250) 



as (?) ignotus. The specimens on which this species 



was then tentatively founded, two of them in the Challenger 

 collection and the third in the British Museum, were in an 

 unsatisfactory state of preservation, so that Professor Herdman 

 was unable to determine the genus, or even with certainty the 

 family, to which the species belonged. Our specimen was pre- 

 served simply in methylated spirit, but on sectioning it was 

 found to be in a better state than might have been anticipated, 

 giving good results with the usual stains and making possible 

 a fairly complete study of its anatomy. In the following 

 description, Maurice's monograph on Fragaroides (' Arch, 

 de Biol.,' viii, pp. 205 — 495) has been used for comparison 



VOL. 87, PART 1. — NEW SER. A 



