358 



Fredei •ick Gh(ip7nan 



Dimensions. — Approximate lengtli of type specimen (including 

 impression of the anterior part of the pro-ostraciim), i;^2 mm. ; 

 width of anterior extremity of pro-ostracum, 6-5 mm. ; thickness 

 of ventral lip of alveolus in tyjje specimen, 8 mm.; approximate 

 length of mucro, measured dorsally from the basal sinus at junc- 

 tion with the pro-ostracum, 13.5 mm. Distance from centre of 

 alveolus to edge of lip, 21.5 mm. 



Relationships. — Piesumably on account of the thickened ventral 

 lip of the alveolar border, and the strong mucro, the present species 

 has been listed by some Australian authors in the genus Belosejv'a. 

 Although characters such as those mentioned, agree witli BeIo.'ie/>ifi. 

 yet the latter genus is distinct in several essential characters, and 

 these mav be tabulated as follows : — 



It is especially noteworthy that young individuals of .Xotosepin, 

 in having a recurved mucro, point to the older Belosepia type of 

 shell; whilst the straight mucro of the adult form agrees more 

 nearly with that of the living Sepia, in which it is normally 

 straight, or only slightly l)ent. 



Observations. — A large portion of the inner surface of the an- 

 terior region of the pro-ostracum in the type specimen, was for- 

 tunately preserved in collecting the specimen, and this materially 

 adds to our knowledge of the form of the complete sepion. The 

 pro-ostracum is thin and expanded, as in Sepia, and bordered by 

 a wrinkled sub-chitinous membrane. 



