244 MANGILTA. 



M. BERTRANDI, Payr. PL 21, fig. 12 ; PI. 32, fig. 47. 



Shell chestnut- or chocolate-brown, with usually an indistinct 

 central darker band, ribs often white ; whorls rounded above, 

 without distinct shoulder. Length, 9-14 mill. 



Mediterranean Sea. 



M. cxrulans, Phil., is a synonym. The M. cserulans figured 

 by Appelius (PL 32, fig. 47), and which Monterosato has named 

 M. indistincta, does not appear to differ material^ ; it has not 

 been described. 



M. COSTATA, Forbes and Hanley. PL 34, fig. 77 ; PL 32, fig. 37. 



Shell with 7 or 8 stout ribs ; whorls without shoulder ; 

 spire varying in length ; spire and upper half of the body-whorl 

 chestnut- or chocolate-color, lower half of body-whorl light 

 yellowish brown, sometimes yellowish brown with darker linea- 

 tions. Length, 12 mill. 



Sweden to Mediterranean. 



Mr. Jeffreys says : " The Marex costatus of Pennant is a 

 mixture of small shells belonging to different genera." I follow 

 him in ascribing the name to Forbes and Hanley who have 

 accurately diagnosed the species, rather than to any of those 

 earlier authors who used it indefinitely. The P. coarctata, 

 Forbes (fig. 37), is merely a larger form of this species, mainly 

 northern in distribution. M. pusilla, Reeve, and M. balteata, 

 Reeve, are both made synonyms by Forbes and Hanley; they 

 are described without locality, but the former has shouldered 

 whorls and too man}' ribs, and the latter has been identified as 

 Australasian by Mr. Brazier, and as West Indian by Mr. Swift. 



M. SICULA, Reeve. PL 21, fig. 10. 



Shell chestnut- or chocolate-brown within and without, with 

 narrow brown lines, more conspicuous on the thickened lip, 

 which is lighter colored ; whorls rounded, rather gibbous, those 

 of the spire obtusely angulated. Length, 12 mill. 



Sicily, Adriatic Sea. 



PI. plicatum, Phil., is a juvenile. 



AI. MULTILTNEOLATA, Dcshayes. PL 22, fig. 53. 



Longitudinal ribs rather numerous, close together, curved ; 



