1^2 PROCEEDINGS OF THE ACADEMY OF [April, 



Atys cinctorii n. sp. 



The shell is perforate, very shortly fusiform, swollen and smooth 

 in the middle, rapidly tapering and encircled with impressed lines 

 towards the two ends. The vertex is narrowly concave, plain. 

 Columella prominent in the middle. 



Length 2.6, diam. 1.35 mm. 



Type No. 3185, A. N. S. P. 



The lip is somewhat broken. It resembles the Chipolan A 

 oedemata Dall, but has not the ornamentation of the vertex seen in 

 that species; and the columella is rather strongly prominent in the 

 middle. In oedemata it is figured as straight. 



Atys sulculorum n. sp. 



Shell imperforate, short, swollen, with sculpture of about 15 

 ■encircling grooves, which are widely spaced in the middle; low and 

 rather close vertical folds are seen in the upper part. They pass 

 over the vertex and converge to the axis. Summit concave. The 

 columella is rather thick, terminating in a prominent plait'. 



Length 2.3, diam. 1.35 mm. 



Type No. 3317, A. N. S. P. 



Terebra baculiformis n. sp. 



The shell is very slender, of nearly flat whorls. These have axial 

 sculpture of narrow, continuous, retractive, arcuate riblets, and 

 spiral sculpture of unequal cords and threads, which are weak where 

 they pass over the riblets. A narrow, convex posterior fasciole has 

 about 6 fine, unequal spiral threads, and is defined by a rather deep 

 sulcus, also striate. Below the sulcus there are about 7 unequal 

 cords, followed below by a group of finer threads. On the last whorl 

 the axial riljlets are sigmoid and extend to the siphonal fasciole the 

 uneven spiral striation covering the same portion. The anterior 

 channel is rather long for this genus, narrow. The columella is 

 smooth and very weakly sigmoid, being less bent than in most 

 Terebras. 



Length 30, diam. 5 mm.; 10| whorls remaining. 



The type is No. 2906, A. N. S. P. 



Terebra hitia n- sp. 



The shell is very slender, with slightly convex whorls. Sculpture 

 of many narrow axial riblets, narrower than their intervals, retrac- 

 tive above, vertical in the lower two-thirds. Below the suture 

 there are two spiral cords under the ribs, followed by a deeper sulcus 

 and then a prominent spiral, below which there are about 6 spiral 



