1904,] NATURAL SCIENCES OF PHILADELPHIA. 21 



Hirado, Hizen. Types No. 85,999, A. N. S. V., from No. 8436 of 

 Mr. Hirase's collection. 



This form is smaller than N. semiplicata and has stronger spiral cords 

 throughout. It is related to N . incrassata and N. festiva. 



Another form of the same species, from the same locality, is smaller, 

 with more numerous, weaker folds, about 15 on the last whorl, and 9 

 spiral cords. 



Length 13, diam. 6.8 mm. 



Length 12, diam. 6 mm. 



At Fukura, Awaji, there is another form referable to hiradoensis, but 

 more elongate, with smaller folds, 15-17 on the last whorl, or obsolete 

 on its later half, the teeth within the lip smaller. The shell is of a dull 

 dirty yellow tint externally, the mouth yellowish-brown or chestnut- 

 tinted within. 



Length 19, diam. 9 mm.; aperture 8 mm. long. 



This race looks a good deal like some forms of A^. mendica Gld. 

 The operculum is smooth-edged. 



Nassa semiplicata Mzenensis n. subsp. PI. IV, figs. 36, 36a. 



Much smaller than hiradoensis, with the folds small and close, but 

 not strong on the spire, weak or obsolete on the last whorl. There are 

 weak spirals above and below on the last whorl, obsolete in the periph- 

 eral region. Whorls about 7, of which the first H are smooth, forming 

 " bulbous, elevated protoconch. Teeth within the outer lip weak. 

 Color purple-black, reddish-brown or olive, sometimes with a light 

 band. 



Length 10 to 11, diam. 5 mm. 



Hirado, Hizen. Types No. 85,996, A. N. 8. P., from No. 843c of 

 Mr. Hirase's collection. 



This form differs from N. teretiuscida A. Ad. by its spiral sculpture. 



AQUILLIDyE. 



Tritonidce and Tritoniidce of authors. 



Lampusidce R. B. Newton, Cat. Brit. Eoc. and Oligoc. Moll. Edw. Coll., 



p. 145 (1891). 

 Lotoriidci' Harris, Catal. Tert. Moll., I, Australasian, p. 185 (1897). Kesteven, 



Proc. Linn. Soc. N. S. Wales for 1902, p. 443. 

 SeptidcE Dall and Simpson, Moll. Porto Rico, p. 416 (1902); Nautilus, 



XVII, p. 55 (September, 1903). 



The preoccupation of the name Triton resulting in a search for other 

 names available for the molluscan group has led to some diversity in 

 modern usage. The earliest available name for the group, so far as I 

 have been able to learn, is Aquillus of Montfort. This name, as John- 



