426 A. E. Verrill — Mollusra of the New Enffland Coast. 



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apex ; it is thickened and partially filled up within. A slightly 

 elevated ridge runs from the anterior end of the opening to the front 

 edge of the shell, but is scarcely larger than the other ribs. The 

 sculpture consists of about forty rounded, moderately elevated, nod- 

 ulous, radiating ribs, with an alternating series of similar but smaller 

 ribs on the lower half. The surface is covered with concentric, 

 raised lines, which are nearly as prominent as the radii, producing a 

 cancellated structure and forming the small, rounded nodules where 

 they cross. The internal septum is highly developed, large, strong 

 and tubular, extending down in front farther than the foramen, with 

 narrow lateral ridges extending nearly to the front edge of the shell. 

 The edge of the shell is thin and slightly crenulated by the ribs. 



Length, 10'""'; greatest breadth, 7™™; height, 5™™ ; anteri'or edge 

 to apex, 8"""; posterior edge to apex, 4-5'""'; length of foramen, 



One dead specimen was taken at station 2222, N. lat. 39° 03' 15", 

 W. long. 70° 50' 45", in 1,537 fathoms, gray ooze, with pebbles, con- 

 cretions and cinders. 



This species differs from P. noachina in being much less elevated, 

 with the sides not flattened; in having the apex less prominent and 

 farther back ; in the distinctly and rather coarsely cancellated struc- 

 ture ; and in having a broader and more fusiform foramen, situated 

 more anteriorly and not extending so far toward the apex ; the inter- 

 nal septum is larger and more flattened and prolongations extend 

 from its anterior edges nearly to the anterior edge of the shell. It 

 seems to be very distinct from all the species described by Watson, 

 Jeffi-eys, and Dall. 



Cocculina reticulata Verriii, sp. nov. 



Shell small, high, with a short-elliptical aperture,' slightly flattened 

 at the sides, but well-rounded in front and behind. The vertex is 

 near the center, but the apex curves strongly backward, with a 

 minute, smooth, prominent, spiral, incurved nucleus, not distinctly 

 turned to either side. The posterior slope is concave and steep, 

 owing to the incurvature of the apex ; the anterior slope is longer 

 and convex, especially toward the summit. The surface is finely and 

 regularly reticulated by radiating and concentric raised lines of nearly 

 equal size, scarcely visible without a lens. The radiating lines may 

 be a little stronger on the sides. Color pale yelloAvish white. 



Length of an ordinary specimen, 2-G""" ; breadth, rs'""' ; height, 



