116 BULLETIN OF THE 



I am inclined to think that Mr. Watson's PL perpauxilla is a young specimen 

 of this species. At all events it is evidently immature and closely related to 

 elusiva and its connections. 



Mangilia bandella Dall. 



Plate X. Fit. 3. 



Pleurotoma (Mangilia) bandella Dall, Bull. M. C. Z , IX. p. 59, August, 1881. 

 Pleurotomella diomedeoz Verrill & Smith, Trans. Conn. Acad., VI. p. 152, pi. xxxi. 



figs. 5, 5 a, 1884. 

 Pleurotomella bandella Verrill, Trans. Conn. Acad., VI. p. 250. 



Habitat. Station 47, Gulf of Mexico, in 321 fms., bottom temperature 47°.0; 

 Station 236, off Bequia, in 1591 fms., ooze, temperature 39°. 0. U. S. Fish 

 Commission, at numerous Stations off the east coast of the United States, in 

 1200 to 2100 fms. 



The metropolis of this species would appear to be in the northern waters. 



Mangilia antonia Dall. 



Plate X. Fig. 4. Plate XI. Fig. 11. 



Pleurotoma (Mangilia) antonia Dall, Bull. M. C. Z., IX. p. 59, August, 1881. 



Habitat. Cape San Antonio, 640 fms. ; Station 163, near Guadelupe, in 

 769 fms., sand, temperature 39°.7 F. 



This species or race may be distinguished from the preceding by the absence 

 of the raised pre-sutural band, the more elevated and slender form, and its 

 Bparse widely separated and rather strong spirals as compared with the rather 

 faint and close-set fiat spirals of M. bandella. 



Mangilia comatotropis Dall. 



Plate XI. Fig. 12. 



Pleurotoma (Mangilia) comatotropis Dall, Bull. M. C. Z., IX. p. 58, August, 1881. 

 Pleurotoma (Mangilia) tiara Watson, Journ. Linn. Soc, X. p. 440, Oct., 1881; Chall. 



Gastr. p. 347, pi. xxi. fig. 7, 1885. 

 Pleurotoma comatotropis Verrill, Trans. Conn. Acad., V. p. 452. 

 Taranis pulchella Verrill, Tran9. Conn. Acad., V. p. 487, pi. lvii. fig. 17 (young), 



June, 1882 ; op. cit., VI. p. 267, pi. xxix. fig. 8, 1884. 



Habitat. Off Cape San Antonio, Yucatan Strait in 640 fms. ; Barbados, 

 100 fms. U. S. Fish Commission, off the east coast of North America from 

 New England to Florida, in 50-500 fms., and south of Cuba, at Station 2135, in 

 250 fms. Challenger Expedition, off Bermuda and Culebra Island, 390-1075 

 fms., mud. It has been found in temperatures from 38°. 5 to 75°.0 F. 



