340 PROCEEDINGS OF THE ACADEMY OF [April, 



growth-lines and lamellae and bounded by a keel. Aperture narrow 

 and long. The specimen figured, broken at both ends, is 51 mm. long, 

 composed of 13 whorls. Toula's description and figure were from a 

 young shell. 



Fig. 2 is typical. Six specimens seen. We doubt whether the 

 following form is specifically distinct, so widely it varies in sculpture. 

 The recent T. panamensis Dall has some resemblance to this species. 

 A complete specimen measures, length 52, diam. 10.5 mm. 



Terebra wolfgangi Toula. PI. XXII, figs. 1, 3-6 ( x 2%). 



Terebra {Oxymeria) wolfgangi Toula, Jahrb., p. 705, PI. 28, fig. 7. 



Very closely related to T. gatunensis, perhaps only a form of that 

 species, from which it differs by having several weak spirals on the 

 sutural band, running over ribs and intervals, and in the smaller 

 number of spiral cords below the band, there being five, equally spaced, 

 on the penultimate whorl, four on the median and upper whorls. 

 The rate of increase of the whorls is about the same as in T. gatunensis. 

 Judging from a number of incomplete shells, an adult of 50 mm. length 

 should have about 20 whorls, of which fully 3 form a narrow, high, 

 smooth embryonic shell. 



This species is somewhat related to the Pliocene and recent T. 

 dislocata Say, and especially to the preceding species. It varies 

 widely in sculpture, as follows: 



1. Sutural band differentiated on the early whorls, but on the last 

 3 or 4 not set off from the other spirals by a deeper furrow; 4 spiral 

 cords as wide as their intervals below it; vertical sculpture fine and 

 low on the later whorls, weak in the intervals of the spirals. One 

 specimen (PI. 22, fig. 1). 



2. Typical form, described above, 2 specimens. 



3. Sutural band divided by one shallow sulcus in the intercostal 

 spaces only. Spiral cords unequal, three in a group, followed .by two 

 separated by wider spaces. Only 12 spirals on the last whorl below 

 the band. One specimen (figs. 3, 4). 



4. Sutural band with several spiral striae indenting the ribs and 

 intervals. Spiral cords unequally spaced. Two specimens (figs. 5, 6). 



Terebra gausapata n. sp. PL XXII, figs. 8, 9. 



A small, slowly tapering species, with very slightly convex whorls 

 and well-impressed, undulating suture. Sutural band limited by a 

 deep, narrow sulcus and, like the rest of the whorl, sculptured with 

 close, unequal, spiral threads. There are three threads upon the band, 

 eight below it. There are fourteen high, rather narrow, longitudinal 



