No. 6.] DEVELOPMENT OF PARYPHA CROCK A. 297 



but in many cases it shows a varying number of short, blunt 

 processes. This condition was most clearly seen in sections 

 stained with ammonio-ferric-alum and haematoxylin. 



Within the nucleolus are a number of small, transparent, 

 highly refractile bodies, the nature of which will be discussed 

 later. There is usually one of these in the nucleus of each 

 primitive ovum, but some contain two. As the ova grow older 

 the number increases and there are sometimes as many as four 

 or five in a single nucleolus. The protoplasm of the cells is 

 granular and often contains a few small vacuoles. 



Up to this time the growth of the various cells of the germi- 

 nal tissue has been about equal, but now several cells increase 

 markedly in size, and often the greater number in one side of 

 the gonophore are found to be thus growing. If, however, a 

 large number take part in this early development, the cells in 

 the opposite side of the gonophore decrease in size, both 

 nucleus and cytoplasm becoming smaller. Soon a few cells 

 attain greater size than the rest and develop very rapidly. 

 Many of the cells in this and the preceding stages are found to 

 possess pseudopodia-like processes quite similar to those fig- 

 ured by Dofiein ('96) for Tubularia. Smallwood ('99) mentions 

 the same condition in the eggs of Pennaria. The pseudopodia 

 extend in between the other primitive egg cells, and the tips 

 are more granular and take a deeper stain than the rest of the 

 egg. Dofiein ('96) has given much attention to the amoeboid 

 forms assumed by eggs of Tubularia, and he inclines to the 

 belief that these processes do not function as mouths by which 

 the surrounding eggs are bodily engulfed. My results have 

 coincided very closely, in most respects, with those of Dofiein, 

 but numerous cases were also observed where the outline of the 

 absorbed egg could be definitely made out within the proto- 

 plasm of the absorbing egg. Even in these cases, however, 

 the absorbed egg did not lie in a vacuole, as would the food 

 taken in by the amoeba, and the outline could only be made out 

 by the greater density of its protoplasm. It seems, therefore, 

 that in this case also we have a blending of the protoplasm of 

 the two cells rather than a digestion and absorption of the one 

 by the other. There seems to be no great uniformity either 



