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570 Bashford Dean Memorial Volume 



Next for study are three ellipsoidal tendril'bearing eggs found portrayed in Dean's 

 portfolio of drawings of Chlamydoselachus . These eggs are not merely ellipsoidal but are 

 decidedly oblong. Two of them were fertile, while the third, the wind egg previously 

 referred to, was infertile. 



SoifE Oblong FERTriE Eggs 



In Dean's notes, as already referred to herein, the small wind egg is recorded as 

 coming from the left oviduct of a female Chlamydoselachus taken off Misaki in 1905. From 

 the right oviduct of this same fish were obtained "3 oblong eggs" of which two were 

 "drawn". The one of the oblong eggs, not drawn, was roughly sketched in pencil in the 

 notebook with the caption "stage early, probably gastrula". This sketch is reproduced as 

 number C in my Text-figure 26. Note that the capsule has a tendril-bearing process at 

 one end. This is very like the process in one of the "drawn" eggs now to be studied. 



Symmetrical Oblong Eggs. — With the notes just quoted is the cryptic statement 

 "135 mm. x 70 and longer". I identify the two oblong eggs "drawn" with Figures 

 2 and 3, plate I. The smaller egg (Figure 3) is symmetrical and measures (in the original 

 drawing) 116 mm. excluding the processes and 140 mm. over them; it is 78 mm. deep. At 

 the right end is a very short process, apparently the remains of a longer one. At the left 

 end is a slightly curved stumpy process, 20 mm. long. Apparently the tip of this has been 

 broken off leaving some splinter-like fragments. Along one side is a raphe which extends 

 out on the long process. Its relation to the fragment of the process at the right is not 

 clear. The capsule is everywhere covered with close-set parallel striations. At the left 

 many of these striations are gathered together and extend out on the long process. 



Among the Chlaynydoselachus material deposited in the zoological collection of 

 Columbia University and loaned by Prof. McGregor for this study, is an oblong encapsul- 

 ed egg. This measures 108 x 71 mm.: is not only oblong but slightly asymmetrical, and 

 has a large raphe similar to that on the egg figured. The raphe extends from a rudimentary 

 blunt process at one pole of the egg over the yolk mass and out onto a short process ending 

 in tendriliform fragments. This tendrilitorm process is somewhat shorter than that in 

 Figure 3, plate I, and the egg is somew^hat smaller. I believe, however, that this egg is the 

 one figured, and that the slight differences are due to shrinking after 33 years in alcohol. 



In the 108-mm. oblong egg, and in two others of about the same size from Columbia 

 University (both having embryos), the raphes are complete. They entirely encircle 

 the eggs, but are better developed on one side than on the other. Their function is 

 not known. The color of the capsules of these preserved eggs is a Hght brown. A 

 crumpled capsule, from w^hich egg and embryo have been removed, appears decidedly 

 browner than those capsules enclosing yolk masses. Possibly this difference in color 

 between these capsules and that of the wind egg (Figure 51, plate V) is due to their long 

 immersion in alcohol. 



Asymmetrical Oblong Eggs. — The larger of the two oblong eggs, referred to in 

 Dean's notes, is decidedly asymmetrical (Figure 2, plate I). Its length (excluding its one 

 process — the other, if present, is hidden) is 135 mm. and its width 87 mm. It is pre- 



