100 BULLETIN OF THE 



wider somewhat channelled interspaces; on the upper whorls there are 3-6 of 

 these threads, on the last whorl they extend to the anterior end of the canal, 

 becoming more crowded anteriorly; behind the carina the shell is smoother, 

 there are faint spirals, hardly raised, and sparser over the centre of the fasciole 

 than on each side of it; there is no distinct secondary striation; transverse 

 sculpture of faint incremental lines, which rise more or less into little wrin- 

 kles at the suture, and sometimes undulate the peripheral angulation on the 

 apical whorls ; suture distinct ; whorls moderately full ; aperture ovate ; canal 

 nearly straight, not wide; pillar so twisted as to form a pervious coil ex- 

 tending the whole length of the axis, thin, simple ; outer lip thin, modified by 

 the sculpture; notch wide, shallow, half-way between the suture and the carina; 

 outer lip strongly arched forward. Max. Ion. of shell, 47.0 ; of last whorl, 34.0; 

 max. lat. of shell, 15.6 mm. 



Habitat. South of Cuba at U. S. Fish Commission Station 2127, in 1639 

 fins., mud. 



This fine and fragile shell recalls Pleurotoma Catherines Verrill, which has 

 the fasciole at the suture, and probably belongs to a different section. There 

 is nothing like it in the Challenger collection. 



Subgenus CYTHARA Schumacher. 



Cythara Schumacher, Essai, p. 245, 1817. Type, Cancel/aria citharella Lamarck 



(not Cithara Klein). 

 Mangelia Reeve, Conch. Icon , III., 18J6. (Same type.) Not Mangelia Leach and 



Risso, 1826. 

 Eucithara Fischer, Manual, p. 593, 1883. 



Cithara Klein, 1753, is not binomial, and is a synonym of Harpa Rumphius, 

 1705, if pre-Linnean names are to be considered. Whether we consider them 

 or not, Cithara Klein, being itself a synonym, cannot stand in the way of a 

 proper use of the name such as that made by Schumacher. Mangelia Reeve 

 is founded on the same identical type as Cythara Schumacher, and is not the 

 same as the Mangelia of Risso and Leach, properly spelled Mangilia. There 

 are several species known from our southern waters. Of these there is some 

 doubt as to their absolute pertinence to the group of C. striata Schum. (= C. 

 citharella Lam.), which cannot be cleared up until the soft parts of both are 

 known ; but, so far as the shell is concerned, they appear to be closely related. 

 The shells which are known from our coasts and seem to be appropriately re- 

 ferred here are C. astricta Reeve, which has been found by Hemphill in Florida 

 among the Keys. C. balteata Reeve (non Auct.), which extends from North 

 Carolina southward and is far from rare in Florida, is a very variable shell, es- 

 pecially in regard to slenderness and number of ribs. It can usually be deter- 

 mined by the microscopic character of its surface, covered with fine, close, even 

 frosted spirals, and by its general aspect. The brown band present in so many 

 of this group is not invariably present in any species. C. biconica C B. Adams 



