MUSEUM OF COMPAKATIVE ZOOLOGY. 237 



This seemg to be an excellent species. The width of the area varies more, 

 however, than one would suppose from Jeffreys' description. It is sometimes 

 wider than in L. aurita, but the hinge-line is longer and the comers more 

 nearly rectangular than in that species. 



Limopsis antillensis Dall. 



Limopsis antillensis Dall Bull. M. C. Z., IX. p. 119. 



Plate VIII. FlKB. 7, 7 a. 



Habitat. Sigsbee, off Havana, 80 fms. 



No more specimens of this species have been found in the collection. I sus- 

 pect it to attain a considerably larger size when adult. 



Limopsis cristata Jeffbbts. 



Limopsis cristata Jeffreys, Dall, Bull. M. C. Z., IX. p. 119. 



Limopsis minuta var.? 



Habitat. Yucatan Strait, 640 fms. 



On further study I am somewhat in doubt whether these three poor valves 

 do not belong to a young stage of L. minuta. The specimens in the Jeffreys 

 collection are all so small, or in such poor condition, that I cannot regard them 

 as affording suflScient evidence of a species different from minuta^ though per- 

 haps those in the British Museum may be better preserved. 



Limopsis aurita Brocchi. 



Limopsis aurita Brocchi, Dall, Bull. M. C. Z., IX. p. 118, 1881. 



Habitat. Gulf of Mexico, west of Florida, 30 fms.; Station 36, 84 fms.; 

 Station 20, 220 fms.; Gulf Stream, 447 fms.; Stations 253 and 264, in 92 and 

 416 fms., near Grenada ; Station 269, near St. Vincent, in 124 fms.; Station 

 176, off Dominica, in 391 fms.; and Station 16.3, off Guadelupe, in 769-878 

 fms. The bottom temperatures varied from 39° to 70° F., the average being 

 about 55° F. 



Var. paucidentata. Shell thinner, smoother, with narrower margin, smaller 

 and fewer (4 -|- 4) teeth, ends of valves less expanded, less oblique ; radiating 

 sculpture red viced to rows of small scars ; concentric sculpture obsolete. Alt. 

 9.0 ; max. lat. 9.0 mm. 



Two valves at Station 117, in 874 fms., gray ooze, near Jamaica; bottom 

 temperature 40°.0 F. 



