■A 



706 



Bashford Dean hiemorial Volurne 



Text-figure 37. 

 Egg capsules of Heterodontus phillipi and H. gakatus: A, egg case of H. phiUipi; B, egg case of 

 H. phillipi with interior exposed; C, egg capsule of H. gakatus. The author states that the egg case 

 of H. phillipi is about sis inches (152 nun.) long; that of H. gakatus 4.5 inches (114 mm.) long — 



presumably without the tendrils. 

 After Waite, 1896, f\. 12 



The only adequate account of the egg capsules of Heterodontus phillipi is that of 

 W^aite (1896), who also described the egg capsules of H. galeatus. His drawings of the 

 egg capsules of both species are reproduced as my Text -figure 37- Because of their 

 unique value, Waiters descriptions are here quoted in full. 



The egg cases of both species [phillipi and gakatus] have the foUowing points in com- 

 mon: All parts are composed of a flexible hom-Hke substance of brown color. The body 

 consists of a chamber, shaped Hke a pear; the coronal portion is compressed into a cervix 

 through which the young shark eventually escapes. From each side of the cervix, and integral- 

 ly connected with it, arises a ribbon exactly resembling a strip of kelp. These ribbons are 

 attached basaUy, their free edges turned towards the cervix and deflected considerably from 

 the body. They pass round alternately and obliquely, and form the thread of a righthanded 

 double screw, together making five or sis turns to the base [smaller end of the capsule] . These 

 ribbons originate [with] about half the width they quickly attain, and continue their course 

 of even breadth, again narrowing on approaching the base. The interior, as shown by 

 a section [Text-figure 37b] is wide and capacious; the fissure does not proceed to the base as 

 generally portrayed, but terminates some distance short of it; the inside is marked with 

 obKque striae corresponding to the direction of the spirals, and resembHng the lines inside 

 a vessel turned upon a potter's wheel. 



The principal differences between the egg cases of the two species may be recounted 

 thus: Cestracion [Heterodontus] phillipi [Text-figures 37-a. and 37b]: Of larger size; about 



