PLATE XXVII. 



FIGS. 



1 and 2. Molgula socialis Alder, (p. 56) Views of mantle : 

 three times natural size. 1 . Right side, showing 

 digestive organs. 2. Left side, showing repro- 

 ductive organs, etc. 



3-5. Molgula inconspic.ua A. & H. (p. 59) 3 and 4. 

 Views of mantle (3, right side ; 4, left side) : six 

 times natural size. re. rectum. 5. Mantle laid 

 open, showing digestive and reproductive organs : 

 about eight times natural size. 



6-8. Molgula citrina A. & H. (p. 62) 6 and 7. Views 

 of mantle (6, right side ; 7, left side) : three and 

 a half times natural size. 8a-d. Larva, in diffe- 

 rent stages of growth : magnified. 



