MUSEUM OF COMPARATIVE ZOOLOGY. 193 



ralists to be distinct ; the smooth ones have rounder whorls, a feature result- 

 ing mechanically from the absence of the ribs. For these reasons the name 

 given by my friend Mr. Watson to the sculptured form would better be re- 

 tained in a varietal sense. His variety subacta does not differ from his type 

 more than many of my individuals differ from each other. The outer lip is 

 immature or broken in both of the specimens he figures. 



Astyris Saintpairiana Caillet. 

 Columbella Saint- Pairiana Caillet, Journ. de Conchyl., XII. p. 279, pi. ii. fig. 4, 186-1. 



Habitat. Station 247, off Grenada, in 170 fms., ooze; and Station 259, near 

 by, in 159 fms., ooze, bottom temperature 53°.5 F. Marie- Galante, W. I., 

 Caillet. 



It is possible that this rare and pretty species may be a large, smooth form 

 of C. Lafresnayei F. & B., described from the same locality in 1856. The latter 

 differs chiefly in having the transverse ribbing continued on to the last whorl, 

 and in somewhat smaller size. One of the Blake specimens of C. Saintpairiana 

 in addition to the rosy tint shows pale yellow brown mottlings over the sur- 

 face, strongest near the suture, recalling the coloration in pale specimens of 

 0. lunata Say. 



Astyris (lunata var.?) Duclosiana Okbignt. 



Columbella {Astyris) Duclosiana Dall, Bull. M. C. Z., IX. p. 91, 1881. 

 Columbella Duclosiana Orb., Moll. Cuba, II. 136, pi. xxi. figs. 31-33, 1842. 



Habitat. Station 20, 220 fms.; Sigsbee, off Havana, in 450 fms. 



This pretty little species is closely related to Astyris lunata Say, of which it 

 is with little doubt only a southern color-variety. The National Museum has 

 it from Samana Bay, St. Domingo, and Tampa Bay, Florida, where it occurs 

 abundantly. It has also been received from Barbados. 



Subgenus ^ESOPUS Gould. 



jEsopus Gould, Otia Conchologica, p. 138, Dec, 1860; type, jE. japonicus Gould. 



Little attention seems to have been paid to this peculiar and interesting 

 group since it was described by Dr. Gould. Several species have been de- 

 scribed that should be referred to it, beside JE. filosus Angas which according 

 to Tryon should not be referred to it, but this opinion I am not in a position 

 to discuss for want of material. Beside the type which is now under my 

 eyes, and was collected by Dr. Win. Stimpson in Japan, there is a Californian 

 species called Amycla ? chrysalloidca by Dr. P. P. Carpenter, and also the species 

 about to be referred to from the eastern coast of America. 



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