50 PROCEEDINGS OF THE NATIONAL MUSEUM vol.70 



This would seem to be a relatively shallow-water species, obtained 

 in considerable numbers in the region of the Florida Keys and the 

 Antilles by the late John B. Henderson, jr., in whose honor it is 

 named. 



MITRA GRAMMATULA, new species 



Shell small, short fusiform, of about five whorls with a minute smooth 

 nucleus of a whorl and a half; color pale brown, darker in the spiral 

 interspaces which show in the throat as dark lines; suture minutely 

 channeled; spiral sculpture of (on the penultimate whorl three, on 

 the last whorl about a dozen) strong squarish cords with narrower 

 interspaces, growing smaller toward the canal and covering the entire 

 whorl; the cord in front of the suture is separated by a somewhat 

 wider and deeper interspace from those in front of it; axial sculpture 

 of numerous equal regular narrow sulci, cutting the stronger spirals 

 into squarish nodules but less evident on the base; aperture narrow, 

 pillar with two rather obscure plaits; canal hardly differentiated. 

 Length, 4.5; diameter, 2.3 mm. U. S. Nat. Mus. Cat. No. 333456. 



Off Georgia, two specimens. 



This verges toward Mitromorpha. 



MITRA WANDoEnSIS Holmes 



Volutomitra wandoensis Holmes, Postpliocene foss. S. Car., p. 57, pi. 10, figs. 



10, 10a., 1860. 

 Mitra rushii Dall, Conch. Exchange, vol. 2, p. 9, 1887. 



Off Georgia, two specimens. From Cape Hatteras to the Gulf of 

 Mexico, in 12 to 60 fathoms; United States Fish Commission. 



Genus MITROMORPHA A. Adams 



MITROMORPHA BIPLICATA Dall 



Mitromorpha biplicata Dall, Bull. Mus. Comp. Zool., vol. 18, p. 165, pi. 35, 

 fig. 1, 1889. 



Off Fernandina, three specimens. 



MITROMORPHA UNDULATA. new species 



Shell small, white, of about five whorls, including one rather large 

 smooth nuclear whorl; suture undulate, appressed; spiral sculpture of 

 (on the penultimate whorl four, on the last whorl about a dozen) 

 prominent equal cords, slightly swollen where they cross the ribs, 

 the posterior cord somewhat more widely separated from the rest; 

 axial sculpture of (on the penultimate whorl nine) rounded ribs with 

 equal or wider interspaces, crossing the whorls but becoming obso- 

 lete toward the end of the last whorl ; aperture narrow, outer lip sharp, 

 Urate within; pillar with two well-marked pustulations, canal short, 

 slender, slightly recurved. Length, 7.5; length of last whorl, 5; 

 diameter, 4 mm. U. S. Nat. Mus. Cat. No. 107995. 



Off Fernandina, one specimen. 



