197 Dominican Fossils 1 — Maury 33 



Terebra Wolfgangi Toula 

 Plate 4, Figure 6 



Terebra dislocata Gabb (in part), Trans. Amer. Phil. Soc, vol. 15, p. 



225, 1873. Specimens Gabb Coll. Cornell Paleont. Museum No. 



7666. Not T. dislocata Say. 

 Terebra Wolfgangi Toula, Jahrbuch der K — K, Geol. Reichsanstalt 



Wien, vol. 58, pp. 705, 706, pi. 28, fig. 7, 1908. 

 Terebra Wolfgangi Brown and Pilsbry, Proc. Acad. Nat. Sci. Phila., 



pp. 340, 341, pi. 22, figs. 1, 3-6, 1911. 



Shell slender, acute, resembling T. gatunensis in form and 

 size; whorls of a decollate shell twelve; ornamentation on each 

 whorl consisting of a subsutural band, occupying slightly less 

 than one-third of the width of the whorl, and marked off by a 

 furrow beneath which are five spiral cords (the fifth sometimes 

 covered by the following whorl) extending to the suture of the 

 next volution. A striking characteristic of this species is that 

 the sub-sutural band is cut by several incised, revolving spiral 

 lines which bisect or trisect the band. The transverse sculpture 

 consists of many very fine riblets (about thirty-three on a whorl 

 with a diameter of 8 mm). These cross the sub-sutural band in 

 a slightly obliquely direction, are interrupted by the furrow, and 

 become gently arcuate on crossing the five spiral cords. Length 

 of decollate shell 40 mm., greatest diameter 8 mm. 



Toula likens T. Wolfgangi to the recent T. pertusa Born; 

 but on comparing our specimens with those of T. pertusa in the 

 Newcomb collection, the relationship is evidently only a very 

 general one. The species has a much closer resemblance to the 

 fossil shells T. gatunensis, spirifera and cirrus. The last two can 

 be quickly separated from Wolfgangi by their bi-plicate columellas ; 

 but it is more difficult to distinguish Wolfgangi from some forms 

 of gatunensis. The tri- or bi-secting of the sub-sutural band in 

 Wolfgangi is a useful guide. 



A number of authors have reported Wolfgangi from the 

 Isthmus. It is to be regretted that we obtained no specimens of 

 this shell on our 191 6 Expedition, and have only two collected 



