'I'M OKIC GLAND" OF THE ASCIDIAN BOTKVLLIS. 49 



lumen of the organ in the form of a liquid while the indigo curium 

 is found concentrated in solid form in the gland of Styela. 



7. In the tunicates in general no special kidney of excretion has 

 been recognized. Although the gland in question may have 

 other function- al-o, \vt its structure and properties seem to 

 indicate that it i- the kidney of excretion of the tunicate-, and 

 i^ in turn homnlogmi-. to the vertebrate liver. 



LITERATURE. 



Bancroft 



'06 Vaii.itii.r. and Fusion in Compound Ascidians. Proc. Gala. 



A. ' ;;. 



Van Beneden 



'46 KI-I ln-i. li< - !Ui 1'i-inl-: .mie ct la physiologic d ii<3 





 Van Beneden et Julin 



'84 !< nt postembrionnaire d'une Phallu-i'-. Ai<h. 



<li- I'.i.il., \ '.. '> i . 



'86 l<. I uniders. Arch, de Biol.. VI.. - ,7. 



Chandelon 



75 !< i mix? digestif des Tuniciers. Hull. .V.i.l. 



5d. Bel \XX1X . .,i i. 



Chrzonszezewsky 



'64 /m A: .'s Archiv. XXXI.. 153. 



'' . ii Aii.iii'iiiir iiinl I'd 1 r. X'irchow's Archiv. X \ X \'.. 157. 



Dahlgrun 



'01 I ut. I-IK hunv; n iil-r ili-n i Excri-lionsorganc der Tunicaton. An h. 



I Mlk! Ai.at . I \ III 



Delle Vail.- 



'81 Nin.vr o>mir .ituralc dcllc Ascidie composte del goli<. 



li Nai'i'li. Atti ilt-i I ii. X.. 431. 



Giard 



'72.i 1-inl- i.li<-. Ar h. de Zool. Gen. et Exp.. I., 397. 



'72>' \<< < In -i> In - -MI l< - A- nil- -<jesou Synascidians. Arch. Zool. I-"x|-r. 



i < .1 n. i . I . 507. 

 Goodrich 



'09 MMHtun- ni tin- .ins of Ainpliioxus. Quart. Jour. Micr. Sci.. 



I l\ . ;- 

 Hancock 



'68 J'lin . 1 inn. >. H , 1 X. 

 Hammar 



'98 /in Kriiiitiii- il.-i 1 1" i- !'.! -A : K' lung bei Anpliioxus. Anal. An/.. XIV., 



602. 

 Harmer 



'92 ( >n tin- Naiuit- ..i tli<- I Processes in Marine I'oly/na. Quar. Jour. 



Micr. Sci a). XXXIII.. i: 



