254 BULLETIN OF THE 
Section NEILONELLA Datt. 
Neilonella Dall, Bull. M. C. Z., IX. p. 125, 1881. 
Shell like Tindaria Bellardi, with a single ligament directly between the 
beaks, chiefly external, but its base dividing the hinge-line, while its upper 
surface extends about equally before and behind the beaks. Type Leda 
(Netlonella) corpulenta Dall. 
This section is almost exactly intermediate between Leda, with an inner and 
outer ligament, and Tindaria, with a purely external one. 
Leda (Neilonella) corpulenta Dat. 
Leda (Neilonella) corpulenta Dall, Bull. M. C. Z., IX. p. 125, 1881. 
Plate VII. Figs. la, 1b. 
Habitat. Station 23, 190 fms., living, bottom temperature 64°.0 F.; Station 
21, 287 fms.; Station 47, 331 fms.; Sigsbee, off Havana, 450 fms. 
No additional specimens of this interesting form have turned up in the col- 
lection ; it probably lived at all the stations mentioned, though valves only 
were obtained except at Station 23. There is nothing like it, recent or fossil, 
in the Jeffreys collection. 
Genus MALLETIA Desmoctiys. 
Section TINDARIA Be rarpt. 
Malletia (Tindaria) cytherea Datt. 
Nucula (Tindaria 2) cytherea Dall, Bull. M. C. Z., IX. p. 123, 1881. 
Malletia veneriformis E. A. Smith, Chall. Rep., p. 246, pl. xx. figs. 9, 9 a, 1885. 
Plate VIII. Figs. 1, la. 
Habitat. Off Cape San Antonio, 413-424 fms.; Yucatan Strait, 640 fms.; 
Station 226, near St. Vincent, in 424 fms.; and Station 2392 of the U.S. Fish 
Commission in the Gulf of Mexico, Lat. 28° 45’, Lon. 87° 30’ W., in 724 fms., 
mud, living, bottom temperature 40°.7 F. 
The original specimens from which this species was described were single 
valves, subiridescent with decay. 'The supposed minute pit proves pathologi- 
cal. The reception of two magnificent specimens from the Fish Commission 
dredgings enables me to correct my erroneous reference of the species to 
Nucula, which I regret the more since it may have led my friend Mr. Smith 
into a redescription of the species. 
