160 PROCEEDINGS OF THE ACADEMY OF [April, 



small specimens, 22 mm. long, the spiral grooves are equal in width 

 to the flat intervals. 



Conus trisculptus n. sp. 



The shell is biconic, the spire composed of slightly concave 

 whorls, with a low carina projecting above the suture. On the last 

 2| whorls this carina bears low nodes (about 20 on the last whorl), 

 but on the earlier whorls the keel is smooth. The upper slope of 

 each whorl has prominent, arcuate radial striae but no spirals. Below 

 the shoulder the surface is slightly convex, contracted a little above 

 the base. The lower half has about 13 spiral grooves, widely sepa- 

 rated except close to the base; and except on the anterior fourth 

 there are spiral series of small pustules which are slightly lengthened 

 in the axial direction, and are arranged in vertical row^s, but some- 

 what irregular in places. 



Length 34.5, diam. 16.5 mm.; length of aperture 27 mm. 



Costa Rica, Pliocene. W. M. Gabb. Type No. 2567, A. N. S. P. 



This cone was with the lot of C. consohrinus ultimus, from which 

 it is at once separable by the smooth keel of the upper whorls. 



Conus consobrinua ultimus n. subsp. 



CotiMs consohrinus Sb}'., Gabb, Journ. A. N. S. Phila. 2 Ser., VIII, p. 359. 



Shell more squarely shouldered than C. consohrinus, and with 

 tubercles extending upon the angle of the last whorl. 



Length 52, diam. 24.3 mm. 



Costa Rica, Pliocene. Collected by W. M. Gabb. Type and 

 five other specimens are No. 3322, A. N. S. P. 



Conus longitudinalis n. sp. 



The shell is about twice as long as wide, with nearly straightly 

 conic, elevated spire of about 10 whorls. These are flat, with an 

 angle projecting above the suture and on the last whorl. There are 

 slightly arcuate, protractive strise above. The last whorl, below 

 the shoulder is coarsely corrugated vertically, the wrinkles somewhat 

 irregular. The anterior third has narrow, spiral grooves, the upper 

 three widely spaced, the rest in pairs, and all crossed by axial threads. 



Length 35, diam. 17.5 mm. 



This species is remarkable for its coarsely wrinkled surface. It is 

 known by one specimen with the outer lip extensively broken, and 

 the spire and part of the last whorl of another. 



Type No. 2574, A. N. S. P. 



