890 I' l!0 CEEDINGS OF THE NA TIOXA L M USE UM. VOL. xx. 



Fig. 7. Cardiomya glypta Bush, p. 810. Hinge of both valves of a young specimen 

 No. 35362; X 22. 



8. Citspidaria pellitcida (Stimpson) Verrill and Bush. p. 805. Interior of left 



valve of specimen No. 48977; X 12. 



9. Eatltyarca (tlittxwritnt Verrill and Bush, p. 843. Interior of left valve of speci- 



men Xo. 78793 ; x 6. 



PLATE LXXVII. 



Fig. 1. Macoma Inftata Dawson, p. 778. Hinge of both valves of specimen No. 

 52429; x 5*. 



2. Yuhlhila litcida CLoven) Verrill and Bush, p. 861. Hinge of right valve of 



specimen Xo. 73173; X about 13. 



3. Toldiella subanf/iilaia Verrill and Bush, p. 865. Hinge of left valve of type 



specimen from station 46 Laclic; x about 13. 



4. Cuspiduria furr/ida Verrill and Bush. p. 799. Interior of left valve of type 



specimen No. 78789; X 4. 



5. Myonera (?) pretiosa Verrill and Bush, p. 812. Exterior of a left valve from 



station 2655 ; X 10. 



6. liathyarca pectunculoides (Scacchi) Kobelt, variety svpteiitrionalis Sars, p. 845. 



Hinge of left valve of specimen No. 74116; X 10. 



7. Cusp id art a par- a Verrill and Bush, p. 801. Interior of right valve of type 



specimen from station 2203; X about 26. 



8. liathyarca anomala Verrill and Bush, p. 844. Hinge of right valve of type 



specimen No. 74081; X 10. 



9. Cardiomi/a abyssicola Verrill and Bush, p. 806. Exterior of left valve of 



specimen No. 52396 ; X 6i. 



10. Halonympha xtriatella Verrill and Bush, p. 810. Exterior of a right valve 

 from station 2655 ; X 10. 



PLATE LXXVIII. 



Fig. 1. Tindaria oallistiformis Verrill and liush, p. 881. Exterior of right valve of 

 type specimen X T o. 52536; X 6. 



2. liathyarca profundicola (Verrill), p. 844. Interior of right valve of specimen 



No. 52174; X 6. 



3. Cnspldarla undata Verrill, p. 798. Exterior of right valve of specimen No. 



52547; X 2. 



4. The same. Dorsal view of the same specimen. 



5. Jlicroyuld'm ri'i/itlaris (Verrill), p. 860. Exterior of left valve of type speci- 



men No. 38-120; X 20. 



6. The same. Interior of right valve of the same specimen. 



7. Limopsis ininnta (Philippi), p. 846. Interior of right valve of specimen No. 



7i;:;i:0; x 4. 



8. Yoldiclla dissimilis Verrill and Bush, p. 872. Exterior of left valve of type 



specimen Xo. 38416; X 15. 



PI.ATK LXXIX. 



Fig. 1. Periploma niidiilata Verrill, p. S2>. Hinge of left valve of type specimen 

 No. 44840; X 7i. 



2. Yoldiclla minnsrnhi Verrill an<l Bush, p. 870. Exterior of right valve of 



specimen No. 3S415; X 12. 



3. Yoldiella inconspicua Verrill and Bush, p. 869. Exterior of right valve of a 



spt cimeii from station 947; X 9. 



4. Yoldiella frigida (Torell), p. 872. Interior of left valve of a specimen from 



station 943; X 16. 



