424 BULLETIN OF THE 



c. Species strongly sculptured. 

 Dentalium disparile Orbignt. 



Dentalium disparile Dall, Bull. M. C. Z., IX. p. 37, 1881 (ex parte). Orbigny, 

 Moll. Cuba, II. p. 202, pi. xxv. figs. 14-17, 1842. 



Habitat. Coast of Florida, in 2-10 fms. Cuba, Orbigny. Bahamas, Eaw- 

 son. Samana Bay, St. Domingo, Couthouy. Barbados 100 fms., Blake Expe- 

 dition. 



This species has no notch or slit when perfect; when truncate it repairs 

 damages by projecting a small tube from the broken end. It recalls D. panor- 

 mitanum Jeffreys, but is smaller, less uniform in sculpture, and has no notch. 



Dentalium ceratum Dall. 



Plate XXVI. Fig. 5. Plate XXVII. Fig. 2. 



Dentalium ceratum Dall, Bull. M. C Z., IX. p. 38, 1881. 



Habitat. West Florida, Pourtal^s, 50 fms. Station 2, in 805 fms. Sigsbee, 

 off Havana, in 119-177 fms. Station 36, in 84 fms. Station 45, in 101 fms. 

 Station 101, off Morro Light, Havana, in 175 to 250 fms. Station 140, off 

 Virgin Gorda, dead, in 1097 fms. Station 208, in 213 fms., off Martinique. 

 Barbados, 100 fms. Station 226, off St. Vincent, in 424 fms., sand. Stations 

 272, in 76 fms., sand ; 290, in 73 fms., sand ; and 299, in 140 fms., coral, near 

 Barbados. Also by the U. S. Fish Commission, south of Cuba, at Station 

 2135, in 250 fms., coral. Temperatures ranging from 42°. 5 to 71°. 0, and 

 averaging 53°. 1 F. 



This species also recalls D. panormitanum, but is always more slender, 

 usually shorter, has a yellow waxen instead of an apricot tint, and the raised 

 sculpture is finer and more uniform. D. ceratum has a shallow wave above 

 and below at the anal end, while D. panormitanum has a true, though, short 

 slit. 



Dentalium Gouldii n. s. 



Plate XXVI. Fig. 4. 



Shell elongated, slender, slightly arched, vitreous, anteriorly whitish, behind 

 with a yellowish or pale greenish tinge ; surface polished, with fine microscopic 

 longitudinal striae, over a large part of the surface ; in well developed speci- 

 mens the shell is hexagonal and six-sided, with the sides impressed so that the 

 ribs stand out like marginating rods ; as the shell grows older, the angles be- 

 come less marked, although generally quite perceptible at the aperture; the 

 lines of growth are visible as extremely fine engraved strioe ; in another muta- 

 tion of the species (which served the draughtsman for Fig. 4), there are longi- 

 tudinal threads between those forming the angles, and which obscure the 



