160 BULLETIN OF THE 



This species recalls M. (Tiirricula 1) longispira and nasuta Sby., and casta 

 A. Adams. It has less llexuous ribs, which are not shouldered against the 

 suture, more rounded whorls and a longer canal than any of the above as far 

 as one can determine by the figures in the Thesaurus. A pale pinkish-white 

 variety has the maximum number (10) of spiral riblets behind the termination 

 of the suture, and in this form the cancellation is less marked than in the 

 majority, which have the spiral about equal to the transverse ribs. 



Mitra (CostellariaV) Deshayesii Reeve? 



Mitra Deskai/esn Reeve, Conch. Icon., fig. 170, 1844. 



Mitra rustica Sowerby, non Reeve ; Thes. Conch., fig. 143, 1874. 



The single imperfect specimen which I refer with much doubt to the above 

 species, while strongly resembling Sowerby's figure, difi'ers from it in having 

 the aperture strongly internally lirate, and between the ribs spiral threads, 

 hardly visible on the ribs ; there is an impressed line before the suture, which 

 indents the ribs, forming a sort of margination to the suture ; there are half 

 a dozen strong spiral threads on the canal ; the color is chestnut with a pale 

 band above the periphery, and there are three plaits on the columella. The 

 original Deshayesii is reported from the Red Sea. 



Mitra (Costellaria?) Rushii n. s. 

 Mitra Rushii Dall, Conch. Exchange, II. p. 9, July, 1887. 



Shell small, evenly fusiform, dark brown, bleaching to pale brown or yellow- 

 ish; nucleus smooth, large, obtuse, of one and a half brown glassy whorls ; other 

 whorls about six, not convex, the last more than half the length of the shell ; 

 suture well marked but not channelled ; sculpture of narrow even numerous 

 flexuous ribs (about four to 1.0 mm.) extending clear across the whorl and hav- 

 ing about equal interspaces ; spiral sculpture of fine even close-set lines which 

 do not cross or are obsolete on the ribs, and a few impressed lines cutting the 

 ribs near the anterior end of the last whorl; aperture short and rather wide, 

 the outer lip simple, not thickened or reflected, the throat strongly lirate ; a 

 small callosity near the angle of the outer lip on the body whorl, and three 

 stout plaits on the short columella. Lon. of shell, 8.75 ; max. lat. of shell, 3.0; 

 Ion. of aperture, 3.75 mm. The majority of specimens are about half as long 

 as this one, and proportionately stouter. 



Habitat. Near Sand Key, Cuba, in about 80 fms. Dredged by the U. S. 

 Fish Commission at Station 2372, in the Gulf of Mexico, in 27 fms., gravel, 

 and off the Carolinas at Stations 2595, 2596, 2607, 2608, 2612, 2616, 2617, and 

 2619, in from 14 to 63 fms., gravel, bottom temperature from 67°. to 75°.5 F. 



This little shell resembles no recent species I find figured ; perhaps if. cethi- 

 opica Jickeli, from the Red Sea, comes as near as any. Volutomitra wandoetisis 

 February 25, 1889. 



