NATICA. 29 



densely lineated with chestnut, the naarkings dislocated in three 

 spiral series. Length, 1-1 -5 inches. 



Panama. 



Closely allied to the next species in general pattern of coloring- 

 only. 



N. Haneti, Recluz (fig. 56), and N. excavata^ Carp., are 

 synonyms. 



N. LiNEATA, Lam. PI. 8, fig. 57. 



Shell smooth, rather largely umbilicated, with inferior entering 

 callus ; white, flexuousl}^ lineated with chestnut, except at the 

 base. Length, 1-2 inches. 



Singapore^ Philipjnnes. 

 N. BuRTASENSTs, Recluz. PI. 8, fig. 58. 



Whorls somewhat slanting above, convex below, smooth, 

 polished ; bluish white ; with longitudinal flexuous chestnut 

 lineations ; deeply umbilicated ; columella with a broadly re- 

 flected deep red columellar callosity. Length, 13 mill. 



Isle of Burias, Philippines. 

 N. GRACILIS, Recluz. PI. 8, fig. 59. . 



Whorls more convex and spire more produced than in pre- 

 ceding species ; whitish, with crowded oblique longitudinal liuea- 

 tions ; umbilicus reniform, with a median entering callus. 

 Length, 10 mill. 



Philippines. 

 ^ N. viTELLUS, Linn. PI. 8, fig. 60. 



Whorls slightly plicate at the suture ; orange-brown, obscurel}^ 



lighter banded, with an upper and a lower series of large white 



or yellowish spots ; umbilicus deep, pai'tly circumscribed b}^ a 



superior callus. Length, 1 25-1*75 inches. 



Philippines, Singapiore. 

 N. zoNALis, Recluz. PL 8, fig. 61. 



Shell covered b^^ a very thin brownish epidermis, beneath 

 which it is whitish, with two bands of longitudinal, sometimes 

 confluent chestnut lines ; umbilicus with inferior entering callus. 

 liCngth, 17 mill. 



Viti Islands. 

 y N. RUFA, Born. PI. 9, figs. 62, 63. 



Excavately umbilicated, with central entering callus, and 

 overhanging superior callus; upper and middle portion of 



