73 
Lamy (1917) resteres Lamarck’s genus Crassatella which 
had been rejected in favour of Crassatellites Kriiger; the latter 
name was used by Suter. 
Concerning the animal it ought to be noted that the mantie edges 
are, posteriorly above the ends of the gilis, coalesced to form a 
small anal opening; for the remaing part they are quite separated. 
Beneath the anal foramen the mantie bears sparse and thin tent- 
acles; in its front part, at the sides of the foot, its edges are con- 
siderably thickened, no doubt containing mueous giands. There are 
two pairs of gili plates at each side; the giil axes descend per- 
fectly free without fusing to each other or to mantie. Both pairs 
of lamellae are well developed, here and there joining by inter- 
lamellary connections; otherwise they are entirely smooth. The foot 
is laterally compressed and contains a long ventral byssus groove. 
At the mouth two pairs of large labial palps are present. 
Cyamiomactra problematica Bernard. 
Stewart Island: 36a, some shells, 1. 4.5 (ind. var. truncata 
Suter). 
Pevvievina taxodonta Bernard. 
Stewart Island: 36a, many shells, 1. 3.5. 
Cuna delta (Tate & May). 
North Island: 16, many valves, h. 2.5. 
Fam. C ard i tid ae. 
Cavdita calyculata (L i n n é). 
North Island: 4, 3 sps., 1. 10. — South Island: 29, 6 sps., 1. 
25. — Auckland Island: 41 (Masked Island), 1 sp., 1. 21. 
Venericardia puvpuvata (Deshayes) {=austvalis Lamarck). 
North Island: 11b, many sps., 1. 23.5. — South Island: 29, 1 
sp., 1. 35. — For the nomenclature of this species cf. Smith (1915). 
Venericardia difficilis (Deshayes). 
North Island: 4, 1 sp., 1. 15. — 16, 3 sps. -|- 5 shells, 1. 20. 
— South Island: 29, 6 valves, 1. 23. 
