The Embryology of Chlamydoselachus 



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UNUSUAL ELLIPSOIDAL EGGS WITH TENDRILIFORM PROCESSES 



There are now to be considered certain eggs whose capsules may generally be desig' 

 nated as ellipsoidal but which depart rather widely from the forms studied. All bear 

 tendriliform processes. One is unusual in form but is by no means abnormal. However, 

 it does bear tendrils. Of all the unusual eggs, it departs so little from the normal that it 

 will be considered first in this category. 



An Elliptical Egg 



This egg is elliptical rather than ellipsoidal in outline and bears tendrils at one end 

 (Text'figure 19). It is the only encapsuled egg, other than Nishikawa's (Text'figure 4) 



Text-figure 19 

 An elliptical encapsuled egg (in natural size — 112 mm.) in the Museum of Com- 

 parative Zoology, Cambridge, Mass. Note the striae on the capsule and the 

 tendril-bearing process on the left. The stump on the right looks as if a similar 



process had been cut off. 

 After Garman, 1913, Fig. 4, pi. .59. 



that has ever before been portrayed as a published figure. In 1906, this egg was brought 

 from Japan by Dr. Thomas Barbour and deposited in the Museum of Comparative 

 Zoology at Cambridge, Mass. In 1913 it was figured but not described by Samuel 

 Garman. As my Text-figure 19 shows, the outline of this capsule is an almost perfect 

 ellipse. The egg measures about 90 x 70 mm. The total length of the capsule is 112 mm. 

 and of this the long process accounts for about 18 mm. At the left, the long seemingly 

 round process breaks up into three short unequal-si?ed stumps and each of these into 

 a number of smaller processes, of which the finer outer parts (see Figure 13, plate I) have 

 broken away. At the right end is the stump of a process, apparently the product of an 

 amputation by means of a dull knife of such a process as is still present on the left. The 

 shell is covered with parallel striations. The egg is so drawn that the raphe forms both 

 upper and lower edges or limits of the figure. Garman also figures the egg yolk with its 

 59'mm. embryo removed from the capsule as has been noted. 



