60 
Fam. Philobryidae. 
Philobrya filholi Bernhard. 
North Island: 2, many sps., 1. 1.4. 
Philobrya meleagrina (Bernard). 
North Island: 3, many sps., h. 3.5. — 9, some sps., h. 5.7. 
Fam. Mytilidae. 
Mytilus planulatus Lamarck. 
North Island: 3, many small sps. — 28, 1 small sp. — Stewart 
Island: 31, many sps. — 11,6 sps., 1. 96. — Auckland Island: 37, 
many sps., 1. 100. — 38, many sps., 1. 42. — 40, 2 valves, 1. 135, over- 
grown with calcareous algae. — Campbell Island: 44, 1 sp., 1. 84. 
Oliver (1923) has shown that the species which Suter named 
Mytilus edulis is identical with the Australian Mytilus planulatus 
Lamarck, which differs from the Linnean type in having 2—3 
teeth placed inside the apex, not on an expanded lip. A good 
discriminating character is offered by the muscle scars: in M. plan¬ 
ulatus that of the anterior adductor is small and shorter than the 
scar of the anterior retractor, whereas the latter scar is shorter 
than the former in M. edulis. Oliver gives the maximum length of 
the species as 89 mm, but from the present collections I have 
larger specimens (135 mm; cf. above) at hånd. 
Mytilus canaliculus Martyn. 
North Island: 3, 4 sps., 1. 70. — 19, 1 sp., 1. 45. — 28, some 
sps., 1. 37. — Auckland Island: 39, 1 sp., 1. 50. — 40, 1 shell, 
1. 20. — 41, (Masked Island), 1 sp., 1. 33. — Campbell Island: 
44, many sps., 1. 54. 
Mytilus magellanicus Lamarck. 
South Island: 29, many sps., 1. 43. — Stewart Island: 31, many 
sps., 1. 57. — 32, 2 sps., 1. 70. — Auckland Island: 38, 2 sps., 
42. 39, some sps., 1. 85. — 37, many sps., 1. 56. — 41, 
(Figure 8 Island), some small sps., on a Macrocystis. — 41 (Masked 
Island), many sps., 1. 71. 
