1917.] NATURAL SCIENCES OF PHILADELPHIA. 169 



Length 7.1, diam. 3.4 mm. 

 Type No. 2801, A. N. S. P. 



One specimen was found with the large lot of S. haitensis. It 

 resembles that species in shape but not in sculpture. 



Metulella dominicensis n. sp. 



The long spire has very slightly concave outlines. The embryonic 

 shell is glossy and smooth, of If convex whorls, the first one rather 

 large. Following whorls are very slightly convex, angular a short 

 distance above the suture, which is in a channel. Sculpture of close, 

 fine axial ribs, at first smooth, but at the third a few Aveak spiral 

 cords appear, stronger in the intercostal spaces. On the penult 

 whorl there are 3 or 4 such cords ; on the last whorl about 5 from the 

 periphery up; just below the periphery there is a zone without spirals, 

 then about 20 stronger spirals on the lower part. There are about 

 7 teeth within the outer lip, and 5 or 6 on the columella. 



Length 16.4, diam. 5.2 mm.; 8| whorls. 



Type No. 3217, A. N. S. P. 



Closely related to M. fusiformis, but the whorls are less convex, 

 the spiral sculpture far weaker and the shell is more slender. 



Thais santodomingensis n. sp. 



The shell is somewhat biconic, with short, straightly conic spire 

 and weakly angular periphery. Suture bordered below with an 

 irregular, somewhat scabrous rounded ridge or welt; a somewhat 

 nodose low rounded ridge runs in the anterior concavity. Sculpture 

 of numerous vertical ribs on the upper and middle part of the whorls, 

 strongest at the periphery, ten on the last whorl, and many spiral 

 cords in strong relief. Siphonal fascicle prominent, umbilical 

 crevice open. The aperture has a shallow posterior channel and 

 the usual deep anterior notch. Columella is heavy rounded and 

 straight. 



Length 45, diam. 30 mm, ; 5^ whorls. 



Type No. 3187, A. N. S. P. 



This species may be compared with the recent Caribbean Thais 

 coronata (Lam.). It differs in sculpture, having rounded ribs in the 

 peripheral region, where it is indistinctly angular. In T. coronata 

 the later whorls are distinctly shouldered. There is a spiral ridge 

 in the concavity below, which is wanting in T. coronata. 



Malea elliptica n- sp. 



The shell is narrower than M. camura, with a longer spire. Sculp- 

 ture of flattened, very slightly raised, strap-like spirals, which are 



