315 

 GUnageUa circus, Audouin, Rang, Man. Moll. p. 342. 



('. Mammoi, Mult esc dealer-. 

 1 1 ith. Malta, in calcareous tufa. 



2. BRYOPA ? LATA. 



ClavageUa lata,MvoA. Proc. Zool. Soc 1834, p. I l(> ; Trans. Zool. 

 Soc. ii. 265, t. 30. f. 8-1 0, shell j Owen, Trans. Zool. Soc. ii. 267, 

 t.30.f. 11-16, animal. 



1 1 (ib. Pacific Ocean. 



See also Clavagelle Rape, Rang, Man. Moll. 339, firoin the Isle of 

 Bourbon. 



3. Dacosta. 



The siphon not expanded at the top ; tube shelly, cylindrical ; 

 base enclosed in a hole in the rock in which the animal resides; 

 siphonal apex of the tube simple, circular, not expanded ; the inner 

 surface of the tube, round the valves, is pierced with small holes. 



I have named this genus after E. M. DaCosta, a conchologist of 

 considerable talent in a time when the science was greatly depressed. 



1. Dacosta australis. 15. M. 



Clavagella australis, Stutchbury, Catal. t. . f. 



Clavagella r/onaata, Brod. Proc. Zool. Soc. 1834, p. 116; Trans. 

 Zool. Soc. ii. 265, t.35.f. 1-4 ? Deshayes, in B.M. 



Hab. Australia, Port Jackson (Brit. Mas.); New Zealand {Lady 

 drey) ; Bow Island or Hao, Pacific Ocean {Stutchbury). 



Fam. II. Gastrocii.enid.-e. 



The animal living sunk in sand or holes in rock and shells, en- 

 closed in a shelly tube. The adult animal, as well as the young, free 

 in the tube. The front of the mantle not provided with any ten- 

 tacles. The tube of the adult animal closed at the base, and desti- 

 tute of any slit or tubes. The siphonal end of the tube not ex- 

 panded. 



Subfamily 1. C'm.enaina. 



The tube symmetrical, clavate, free. The animal living free, sunk 



iii sand. 



1. Ch.kna. 



Valves linear, elongate, truncated at the ends ; tube free, cylin- 

 drical, close, larger end closed with a regular convexity at the base . 

 siphons] apex simple, compressed; cavity with two imperfect septa 

 nver the upper pari of the valves. 



1. Ch.kn \ TE8BELLA1 \. B M. 



Chana tessellata, Gray, Proc. Zool. Boe. Ifl 

 Fittulana clava, Lamk. 

 //"//. Philippines ( Cuming). 



