THE ANNALS 



AND 



MAGAZINE OF NATURAL HISTORY. 



[FIFTH SERIES.] 

 No. 53. MAY 1882. 



XXXIV. — Notes on the Structure and Development o/Sipho- 

 iiaria australis, Quay & Gaimard. By Professor F. W. 

 HuTTON, of Canterbury College, New Zealand. 



[Plate XV.] 



l"'iiE only account of the structure of Siphonaria that I have 

 been able to see is that given by MM. Quoy and Gaimard 

 in the Zoology of the Voyage of the ' Astrolabe.' These 

 naturalists showed that Siplionaria was a pulraonate Gastro- 

 pod with a gill in its respiratory chamber ; and they described 

 the alimentary and reproductive organs ; but as, at the time 

 they wrote, the latter organs in the pulmonates were not 

 understood, they did not interpret the different parts quite 

 correctly. 



Siphonaria australis is common in Lyttelton Harbour ; and 

 I have made some observations on its structure and develop- 

 ment which appear to me to be of sufficient interest to warrant 

 their publication ; a list of the New-Zealand species, with 

 descriptions of their dentition, will be submitted to the New- 

 Zealand Institute. 



Alimentary System (Plate XV. fig. 1). — The buccal mass is 

 reddish pur])le ; the salivary glands, which are large and 

 white, open into it, and not into the oesophagus, as stated by 

 MM. Quoy and Gaimard. The oesophagus is short, and 

 gradually expands into the wide and longitudinally plicated 



Ann. & Mag. N. Hist. Ser. 5. Vol. ix. * 24 



