348 PROCEEDINGS OF THE ACADEMY OF [PaRT II 



spines are the same as in M. melongena. The la^'gest in the series is 

 about 15 cm. long. 



The early neanic stage is unarmed as in M. melongena, and some- 

 times it is lirate within the aperture. 



A single specimen with all the appearance of an adult is only 36 

 mm. long (no. 2798 A. N. S. P.). It is probably a dwarf, compar- 

 able to the well known dwarf form of M. corona, inhabiting inlets 

 probably deficient in salinity. (PI. XXXI, fig. 5) 



Melongena orthacantha Pils. and Johns. Plate XXVIII, figs. 13-16. 



Proc. A. N. S. Phila., 1917, p. 168. 



Nassaria corrugata (Gabb) Plate XXII, fig. 15 (N. brevis). 



Muricidea corrugata Gabb, Tr. Am. Philos. Soc. xv, 1873, p. 203. 

 Nassaria brevis Gabb, Tr. Am. Philos. Soc. xv, 1873, p. 213. 



The characters of the types of these species are the same except 

 that brevis is larger. The latter has a rather bulbous embryonic 

 shell of 1^ smooth whorls. The following | whorl has num-erous 

 narrow axial ribs, after which there are strong, evenly spaced axial 

 folds, 9 on the last whorl. These are traversed by acute spiral cords, 

 of which there are six on the penult whorl, with minor threads in 

 two or three of the intervals. The two cords above the suture are 

 small, following two at periphery larger. The mouth is strongly 

 lirate within, and the columella has four short, somewhat ascending 

 plaits. There is also an entering cord near the posterior angle of 

 the mouth. 



Length 20, diam. 13 mm.; 7| whorls. 



The type of M. corrugata has 8 folds on the last ;horl. It meas- 

 ures: length 15, diam. 9.4 mm. 6 3^ whorls. As it has been broken 

 and repaired, and there is no question of the absolute identity with 

 N. brevis, the latter only has been figured. 



Type of M. corrugata is no. 3247 A. N. S. P. ; of N. brevis, no. 3246 

 A. N. S. P. 



BUCCINIDAE. 



Phos semicostatus C;abb. Plate XXII, figs. 23. 24. 25.. 



Phos semicostatus Gabb, Trans. Amer. Philos. Soc. xv, 1873, p. 212. 



A variable species. Typically the coarse folds of the spire give 

 place to fine axial folds on the last whorl, with one to three variceal 

 folds, but sometimes the stronger folds are somewhat numerous, 

 a few examples having seven or eight on the last whorl. 



Length 34, diam. 16.6 mm. Type no 3241 A. N. S. P. 



