SHELLS. 255 



This genus, which is characterized by having the abductor 

 muscles enclosed in a shelly case formed by the reflexed edge of 

 the valve, furnished at its hinder end with two small additional 

 valves, has the faculty of closing its anterior opening, and of form- 

 ing a cup- shape process for the protection of its tubes at its hinder 

 end when it arrived at its full growth. Other species are found in 

 England, as Talona papyracea ; in Africa, as T. dausa ; and I have 

 seen another from South America. 



186. Teredo ? 



Inhab. New Zealand. Dr. Stanger. 



This species forms, at distances in its tube, close imperfect septa, 

 pierced with a large central, simple, oblong hole, surrounded by a 

 reflexed edge ; the tube is thin, of a prismatic crystalline texture. 

 I have not seen the valves or pallettes. 



Fam. SOLENID.E. 



187. Panopea Zelandica. Quoy et Gaim. Voy. Astrol. 

 iii. 547, t. 83, f. 7-9. 



Inhab. New Zealand. Quoy. Yate. 



Fam. ANATIMD^E. 



188. Panopea Solandri. Gray, n. s. 



Inhab. New Zealand, Turanga. Dr. Dieffenbach. 



Shell oblong, ventricose, rounded in front, rather narrower 

 and truncated behind, smooth, white. 



Very like the European P. Aldrovandi, but smaller and more 

 contracted behind ; much more ventricose than the P. Zelandice. 



Named in honour of Dr. Solander, who accompanied Captain 

 James Cook in his expedition, and who did much to illustrate the 

 natural history of New Zealand and other parts of the world. 



189. Myadorastriata. Pandora striata. Quoy et Gaim. 

 Voy. Astrol. iii. 537, t. 83, f. 10. 



Inhab. New Zealand. 



The periostraca is beautifully marked, thin, transparent, and 

 covered with many series of small oblong scales, divided into 

 groups by the radiating lines ; it is reflexed into the edge of the 

 mantles within the edge of the valves. 



" It is extremely difficult to separate the valves of these shells. 

 The foot is small and square when contracted." Bidwell. 



