THE TYI.nKir GLAND" OF THE ASCIDIAN 



BOTKYI.I.l ^ AN ORGAN ( >F EXCRETION? 



) LTON, 



IM k il.i i riON. 



This contribution deals with tin- anatomy and physiolo^ of an 



n found in mosl of tin- :croup- of the Tunicata. Thi- organ 



i- u-uall\ compoxd ol -tern i'|" tine tul>e- which ramif\in^ 



over tin- \\all-ot th.- inie-iin. ^incd to -..me portion of the 



Btoma< h l'\ "He i.j- in,, ic din ts. Although of general occurrence 



in theAscidiacea andThaliacea.yel there ha- lucn n.> concurrence 



"I o|.inion ,i~ to its function. In c. .n-.-i|ucncr of thi- f.ict hardly 

 luo author- ha\c n : to it \<\ Hi.- -am.- name. Hence \\ < 



lia\e ilii- organ loured a- I Claude- di- , i;;n\ , [8lO 



and let. ii.-d to, il ue leave out literal t ran-lat i. n- as, 2) lixer 



Hancock, [866 Kn.lui. 1852 Milne-l-'.duar.U, 1841 . ; 

 glande annexe du tube digestif ( 'hamldon. 1875 v. Winiwarter, 

 1896), i 'Jandola epato-pancreatico I >ella \ all.-. 1881 . - 

 la. teal system Lister, [834 llu\le\. 1851 Kilter. 



inlc-tiual inland llerdinan. [882 Maurice, l x " N . 7 la. line- 



stomaco-intestinales l\..ule. 1884 .lande -t.miacale (van 



Hellfdell et Jlllill. 1 W} . >, d.inillllll-| 'i IlIlelK 11' l>IH-e Seelij 



[882 I 'ahl^riin. [QOl Isert, [903 . [0 j ne r.'trin^ent 



Giard, I s ;- 1 l'i/..n. [893 and II Jandr m |orii|Ue l.na/e- 



1 >uthiers I telagi i 889 \\"ille\ , i - 



\\iih -uch a .lii.c .if name- \\hat -hall \\ e call the or^an in 

 (|iie-iion' >inci- tin- name p\ loric ^land i- -Imn and -ufliciently 

 non-coniniittal and ha- 1-eeii dignified li\ usage, \\ c \\ill use- it in 

 preference i. . the other-. 



The follo\\in^ -tudv i- an outi;ro\\th of one that the writer 

 ha- lieeii at work on for the pa- 1 two years, and as it ha- developed 

 into -lii;htl> other line- than \\a- ori.uinalh planned, he ha- Liken 

 thi- e\cu-e to make a separate I'apcr of thi- |)ortion. The \\ork 



( 'li;ni.|.-l,.iL 

 < .I.U.I. [8720. 



35 



