168 PROCEEDINGS OF THE ACADEMY OF [April, 



Melongena orthacantha n. sp. 



The shell has a shortly conic spire, angular periphery, below which 

 it tapers rapidly. At the periphery there are short radiating spines 

 rising from short folds, which corrugate the upper surface. The 

 last whorl has 12 spines. There is an inferior ridge armed with 

 spines, and a prominent siphonal fasciole. Below the suture there 

 is a convex nodulose or scaly fasciole. The surface has also numerous 

 spiral cords, ten between the peripheral and inferior series of spines. 

 The aperture is smooth within. 



Length 29.7, diam. 25.5 mm.; 5| whorls (type). 

 36.2, " 31.2 " (wornadult)^ 



The type and two paratypes are No. 2956, A. N. S. P. The type 

 is a perfect but not quite adult specimen. A fully adult but worn 

 (beach rolled) shell has 10 peripheral tubercles on the last whorl; 

 the fold-like character is scarcely noticeable in this stage. The 

 sutural fasciole is more prominent. 



In a somewhat broken specimen 35.5 mm. long there are smaller 

 spirals in part of the intervals, increasing the number mentioned 

 abo\ie by about one-half. This specimen has ten spines on the 

 last whorl. 

 Anachis gracilicostata n. sp. 



The type specimen has 7 whorls, the first three smooth, the rest 

 with about 27 straight, axial riblets at least as wide as their intervals; 

 no spiral sculpture above the periphery; below it there are fine spiral 

 lines between the riblets, and on the anterior third about 8 spiral 

 cords. The aperture is about half the total length of the shell. 



Length 4.7, diam. 2 mm. 



Two specimens were found in the lot of A. exilis. As both are 

 immature, the aperture cannot be described; but the characteristic 

 sculpture, unlike any other shell of these beds, will insure recognition 

 of the species. Type and another are No. 2803, A. N. S. P. 



Another species of Columbellid is represented bj' specimens too 

 imperfect for diagnosis. 

 Strombina politissima n. sp. 



The spire tapers regularly, and is composed of 7 convex whorls, 

 separated by an impressed suture, which does not ascend in front. 

 A prominent, rounded varix strengthens the lip, which has a small 

 tubercle within near the posterior insertion, another at the beginning 

 of the anterior canal. There is a small entering callus on the 

 parietal wall posteriorly. Surface smooth and highly polished 

 except at the base, where there are about 14 obliquely spiral cords. 



