348 



NOTES on some points in the STKUCTUEE of the 

 CEKATA of Bendronotus arborescens. 



By Joseph A. Clubb, B.Sc. (Vict.). 



VICTORIA UNIVERSITY SCHOLAR IN ZOOLOGY ; 

 ASSISTANT-CURATOR OF THE DERBY MUSEUM, LIVERPOOL. 



With Plates XII. and XIII. 



[Read April 5th, 1895.] 



The present paper is the outcome of part of the work 

 carried on in the Zoological Laboratory of University 

 College, Liverpool, mider the direction of Prof. Herdman, 

 while in residence for the period covered by the Victoria 

 University Scholarship awarded me in Jmie, 1894. 



I. The Livee and the Ceeata. 



In the Second Report on the Nudibranchiata of the 

 L. M. B. C. District,* drawn up by Prof. Herdman and 

 myself, attention was directed to the pubhshed descriptions 

 by Alder and Hancock! and Dr. Eudolph Berght of the 

 structure of the cerata of Dendronotus arborescens. These 

 distinguished zoologists described and figured the liver of 

 Dendronotus as giving off branched prolongations which 

 run upwards into the dorsal tentacles (rhinophores), and 

 other dorsal processes (cerata). Alder and Hancock 

 figure these hepatic caeca as conspicuous prolongations 

 from each side of the liver, while Bergh represents them 

 as being of large size in the terminal twigs of the cerata, 



* Trans. Biol. Soc, Vol. III., p. 225. 



tRay Society, "British Nudibranchiata," Part II., fam. 3, PI. II. 

 J"Bydragen tot de Dierkunde," Natura artis magistra, Afl. XIII. 

 VIII., p. 25, Amsterdam, 1886. 



