54 BULLETIN OF THE 



Understanding that the name Candelabrum, used (but not described) for this 

 form (Bull. M. C. Z., Vol. V., 1S7S), has been used by Blainville for an echino- 

 derm, I propose to adopt the above designation for the group typified by the 

 following species. 



Ancistrosyrinx elegans n. s. 

 Candelabrum, cathcdralis Dall, I. c. (named, but not described). 



Shell with the canal about the same length as the spire, acutely tapering 

 before and behind ; white ; whorls nine, of which two are embryonic ; aper- 

 ture very long and narrow ; anterior surface of the whorls everywhere sculp- 

 tured with even uniform spiral rows of rounded nodules beautifully reticulated 

 by the lines of growth ; one row about the middle of the whorl slightly ele- 

 vated above the others; carina fringed with delicate triangular points; pos- 

 terior surface of the whorls, except for lines of growth, smooth, with one row 

 of nodules just inside the carina; canal straight, columella not thickened, but 

 somewhat twisted anteriorly, outer lip sharply angulated by the carina. Length 

 27 mm., of which 12 mm. are behind the carinal notch. Max. width, 12 mm. 

 Width of aperture, 4 mm. Defl. 45°. 



Florida Reefs, Pourtales, 1870. Station 2, 805 fathoms, four miles from 

 Havana, Agassiz, 1877-78. 



This is a most exquisite gem of the sea, and will not fit into any of the sec- 

 tions of Pleurotomidce yet eliminated from the Lamarckian genus. 



SUBGENUS BKLA Leach. 



The subdivisions of the Pleurotomidce are at present so indistinctly limited 

 and so poorly defined by diagnosis; the differences of authors in regard to 

 which groups should be taken as of full generic value are so great, and the diffi- 

 culty of decision in the absence of the soft parts so perplexing ; that for the 

 present purpose I shall regard the groups as merely subdivisions of the La- 

 marckian genus, recognizing of course that some of them, when properly elim- 

 inated, are entitled to generic separation. 



P. (Bela) Blakeana n. s. 



Shell very variable in proportions and somewhat variable in sculpture ; thin, 

 white, with a dark nucleus, rather acute spire, short pillar and rather wide 

 aperture; sculpture of revolving threads, two stronger ones immediately in 

 front of tbt* suture, which are nodulated at their intersection with the ribsj 

 with sixteen to eighteen transverse ribs which are strongest near the suture 

 and fade away toward the canal ; notch subobsolete; shell with the waxy pol- 

 ish characteristic of so many abyssal forms. 



Var. normalis. 



Shell short and very stout, seven-whorled, the last whorl about eighl elev- 

 enths of the whole length ; extreme nu. lens smooth ; remainder of the three ami 



