40 TRANSACTIONS OF THE WAGNER FREE 



Glyphostoma 'Watsoni n. s. 

 Plate 2, figure 7. 



Caloosahatchie beds, not rare. 



Shell small, seven or eight-whorled ; nucleus smooth, slightly tilted, the 

 first whorl simple, the next with a peripheral keel ; transverse sculpture vary- 

 ing in strength, generally with (on the last whorl about twelve) riblets, most 

 prominent on the periphery, absent from the anal fasciole and weak on the 

 base ; surface finely shagreened ; spiral sculpture, on the anal fasciole of fine, 

 close-set spiral threads ; in front of the fasciole these are replaced by coarser, 

 less crowded threads, of which one or two on the periphery are more promi- 

 nent and tend to angulate the whorls ; canal short, varix stout, wide ; aperture 

 internally denticulate on the outer lip, with four or five teeth in front of the 

 notch and on the inner lip about as many, or more, stout, rounded transverse 

 lirae. Max. Ion. of shell 7.5 ; max. lat. 3.7 mm. 



This little species is in most respects a diminutive copy of the G. gratiila, 

 but differs also in the close, distinct spiral sculpture of the fasciole, which is 

 proportionally wider than in G. gratula and more roof-like, or less depressed. 

 The canal is also proportionately shorter and the peripheral keel, or keels, are 

 sharper. 



Mangilia quadrata Reeve. 



Pleurotoma guadrata Reeve, Conch. Icon., Pleurotoma, pi. xxviii. fig. 253, 1845. 

 Pleurotoma diininuiaC B. Adams, Contr. Conch., p. 62, 1850. 

 Mangilia eriiinia Bush, Trans. Conn. Acad. vi. p. 456, 1885. 

 Clathmella guadrata Tryon, Man. vi. p. 278, pi. xviii. fig. 31, 1884. 



Caloosahatchie beds. Recent, North Carolina to Yucatan and the West 

 Indies in moderate depths. 



Mangilia quadrata var. eritima Bush. 

 Caloosahatchie beds. Recent, North Carolina, etc. 



Identified from typical specimens. Hardly to be even varietally distin- 

 guished from M. quadrata Reeve. 



Mangilia monilifera Sowerby. 

 Colunibella vwnilifera Sby., P. Z. S., p. 53, 1844. Tryon, Man. Conch, v. p. 149, pi. 53, fig. 



100 (bad), 1883. Reeve, Conch. Icon., Colunibella, pi. xx. fig. 117 (good), 1858. 

 Clathurella monilifera Tryon, Man. vi. p. 278, pi. 14, fig. 9, pi. 18, fig. 43, 1884. 

 Pleurotoma fuscolineata C. B.Adams, Proc. Bost. Soc. Nat. Hist. ii. p. 4, 1845; Contr. 



Conch., p. 54. 

 Pleurotoma scafpta Reeve, P. Z. S. 1846, p. 5, Tryon, Man. vi. p. 278, pi. 18, fig. 43, 1884. 



Caloosahatchie beds. Recent, South Florida and the West Indies, in 

 shallow water. 



I suspect that Mr. Tryon had two species confounded in his mind. At 

 all events, the figure he speaks of as bad is much more characteristic than the 

 one he does not criticise. 



