﻿80 
  

  

  ogy, 
  Johns 
  Hopkins 
  University. 
  8 
  vo., 
  pp. 
  81, 
  pis. 
  X. 
  

   (In 
  Report 
  of 
  Commissioners 
  of 
  Fisheries 
  of 
  Maryland, 
  

   1880.) 
  

  

  The 
  same, 
  published 
  as 
  Contribution 
  No. 
  IV, 
  of 
  Ches- 
  

   apeake 
  Zoological 
  Laboratory, 
  Johns 
  Hopkins 
  Univer- 
  

   sity, 
  (a 
  reprint 
  of 
  the 
  preceding) 
  with 
  a 
  paper 
  added, 
  en- 
  

   titled 
  : 
  The 
  Acquisition 
  and 
  Loss 
  of 
  a 
  Food-Yolk 
  in 
  

   Molluscan-Eggs, 
  8 
  vo., 
  pp. 
  107—116, 
  pi. 
  XI. 
  John 
  Mur- 
  

   phy 
  &Co., 
  Baltimore, 
  1880. 
  

  

  