90 
Fig. 40. Crassatella aurora Adams & Angå s, from exterior. x 2.5. 
Fig. 41. The same, from interior, another valve. x 2.5. 
Fig. 42. Kidderia campbellica n. sp., left valve, from exterior. x 4. 
Fig. 43. The same, right valve from interior. x 4. 
Fig. 44. The same, dorsal view. x 4. 
Fig. 45. Kidderia costata n. sp., left valve from exterior. x 10. 
Fig. 46. The same, right valve from interior. x 10. 
Fig. 47. The same, hinge of left valve. 
Figs. 48—51. Montacuta unidentata n. sp. X 10. 
Figs. 52—53. Montacuta tellinula n. sp. X 6. 
Figs. 54 —55. Spaniorinus zelandicus n. sp. X 5. 
Fig. 56. Anatomy of Kidderia campbellica n. sp. 
Fig. 57. Anatorny of Neogaimardia rostellata Tate. 
Fig. 58. Fossarus ovatus n. sp. X 12. 
Fig. 59. Fossarus conicus n. sp. X 12. 
Fig. 60. Fossarus productus n. sp. x 12. 
Figs. 61 —62. Fossarus hyalinus n. sp. x 12. 
a opening of liver duet into stomach; b byssus giand; c cerebral gang¬ 
lien; e embryo in the giil; / pedal ganglien; g gonad; I liver; L ligament; 
m pedal giand; n nephridium; p pericard; r margin of reflected lamella of 
the inner gili; pedal slit; sn branchial slit; anal slit; t tentacle; 
V visceral ganglien. 
24-5-1924. 
