BY F. JEFFREY BELL, M.A., SEC. R.M.S. 507 



6. Stereoderma validum, Bell, vide infra. 



Port Jackson. 



7. Stichopus, sp., (allied to S. chloronotus, but apparently dis- 

 tinguished by the very long Polian vesicle.) 



8. Holothuria pulla. Vide infra. 



Ugi. 



Thyone buccalis. — I am very doubtful as to the correctness of 

 this determination. Stimpson unfortunately gives no details as to 

 the characters of the spicules of the species, which was found by 

 him in Port Jackson. 



Stereoderma validum. — This species is extraordinarily abundant 

 in Port Jackson. It would be well to examine carefully living 

 specimens side by side with Quoy and Gaimard's figures of 

 Holothuria spinosa, which they report to be very common in the 

 same place. I have carefully considered the subject with Mr. 

 Ramsay, who was at first inclined to think that the species might 

 be identical, and we have come to the conclusion that, abundant 

 as the species is, it has never yet been described. It now remains 

 for the Zoologists of Port Jackson to rediscover Quoy and 

 Gaimard's, H. spinosa. 



Holothuria pulla. — I am a little doubtful as to the accuracy of 

 this determination. 



British Museum, April 30, 1884- 



NOTES AND EXHIBITS. 



Mr. Macleay exhibited for Mr. Wilkinson a very peculiar 

 conical stone implement, found by Mr. A. G Brook, of Gondoblui 

 Station, embedded in the soil on the plains near the Queensland 

 border, between the Narran and Barwon Rivers. The note 

 accompanying the exhibit states that there are no rocks near that 

 locality, and that the old aboriginals of the district know nothing 

 about it. The stone is composed of a soft fine white sandstone, is 



