206 BULLETIN 37, UNITED STATES NATIONAL MUSEUM. 



PLATE LXXXIV Continued. 



FIG. 12. Rochefortia planata Dall; 5.3 mm. No. 108234, U.S.N.M. Alutian Islands. 

 The dark spot between the lamina is the resilium. 



13. Bornia ( Ceratobornia) lonyijtes Stimpson : the posterior extremity, or heel, of 



the foot emitting the byssal thread. Much enlarged. From a drawing 

 by Stirnpson. 



14. Rochefortia molltri Morch ; 6.4mm. No. 108232, U.S,N.M. From a speci- 



men in the Jeffreys collection, named Montavuta elevata by Mc'irch, and 



collected by Torell in Greenland. 



This plate was lirst published in Proceedings U. S. National Museum, vol. xxi. 

 The drawings, except those mentioned as by Stiinpson, are from camera lucida 

 sketches by W. H. Dall. The species are described in the Synopsis of the Leptonacea, 

 pages 873-897 of the volume above cited. 



PLATE LXXXV. 



FIG. 1. Rochefortia (tumidiilavar.t) Verriili Dall, Proc. U.S.N.M., xxi, p. 890. Inte- 

 rior of a leit valve No. 35412 Iroui station No. 2103 ; X 20. , Resilium and 

 ossicle. Off Delaware Bay. 



2. The same. Interior of a right valve from the same station ; X 20. 



3. Kellia suborbicularis (Montagu) var. Couldii Thomson. Interior of left valve 



of a specimen from off Salem, Massachusetts, 1877; X 10. 



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



5. Rochefortia casta Verrill and Bush. Exterior of a left valve from station 



2283 ; X 20. North Carolina. . 



6. Rochefortia plaimlata Stimpson. Interior of a right valve; X about 13. Off 



Hatteras. 



7. Aligena elevata Stimpson. Interior of a right valve No. 74333 from Naushon ; 



X about 13. a, Kesilium and ossicle. 



8. The same. Exterior of a left valve from the same station ; X about 13. 

 This plate Hrst appeared in Proceedings U. S. National Museum, vol. xx. The 



figures were drawn by A. H. Verrill. 



PLATE LXXXVI. 



FIG. 1. Thyasira equal's, variety alta Verrill and Bush, p. 787. Exterior of a left 

 valve from Eastport, Maine, 1870; X about 8. 



2. The same. Interior of a right valve from the same locality; X about 8. 



3. Thya8iraplana Verrill and Bush, p. 788. Interior of left A r alve of type speci- 



men from station 254 ; X 14. Gulf of Maine. 



4. The same. Exterior of right valve of the same specimen. 



5. Nucula ]iroxima Say ( ?) variety ovata Verrill and Bush, p. 852. Exterior of 



left valve of specimen No. 73467 ; X about 12. Vineyard Sound. 



6. Macoma injiata Dawson, p. 778. Exterior of left valve of specimen No. 52427 ; 



X 3. Gulf of St. Lawrence. 



7. Kennerleyia brevis Verrill and Bush, p. 821. a, Exterior of left valve of speci- 



men No. 40232; b, interior of right valve of another specimen No. 45884; 

 X 4. Off Chesapeake Bay. 



8. Nucula granulosa Verrill, p. 853. Exterior of left valve of type specimen No. 



38451 ; X about 26. Off New Jersey. 



This plate first appeared in Proceedings U. S. National Museum, vol. xx, and the 

 page references are to the paper by Verrill and Bush, pages 775-901, of the cited 

 volume. The figures were drawn by A. H. Verrill. 



