310 AXTILLEAX FOSSTLS—OrrrY AND BALL. vol. xix. 



subsequently by Gup] )y.' In looking over tlie Guppy collection, now 

 in tlio Xiitional ^Museum, I liiid a species from Cnniann, labeled M. 

 coiii/ormis, but which can not be distin^^uished from M. cincta, Kieuer 

 (So. 115590, U.S.N.IM.); and another similarly named from Montserrat, 

 Trinidad. Mhicli is a r<'rsirnl<(, closelj^ related to P. ohcsa, Redfleld. 



MARGINELLA DOMINGOENSIS, Dall, new species. 



Oligocene of Santo Domingo, from an island in Lake Henriquillo, 

 and also from the Potrero, Rio Aniina, Bland. Nos. 11308.), 1137GS, 

 U.S.y.M. This spe(;ies is very close to M. aurora., Dall,^ from the 

 Chipola marl, but has the tip of the spire less conspicuous and the 

 aperture (juite llexuous instead of nearly straight. 



PHOS METULOIDES, Dall, new species. 

 (Pliitc XXVIII. Jig. l.->.) 



Shell small, solid, with 7 moderately rounded whorls, elegantly, 

 evenly, reticulately sculptured by numerous subcqual, fiat, strap-like 

 spirals and sul)llexuous transverse riblets with about e<iual interspaces 

 and slightly nodulous at the intersections; aperture small, semiluuate, 

 the outer lip thickened and sharjdy lirate within, sharp edged, and 

 anteriorly receding; body and pillar with little callus, and no marked 

 constriction above the fasciole, which latter is marked by 5 si)iral, Hat 

 riblets crossed by flexuous incremental lines and bounded on either 

 side by the ordinary sculpture without any marked keel. Lon. 20, 

 lat. 9 mm. 



ronton, Santo Domingo, P)laiid, in the Oligocene; also at Moidvcy 

 Hill, on the Isthmus of Panama, in the Oligocene marl. 



The sculptuie of this species strongly recalls that of MrfuJa cancel la{((, 

 Gabb, from the same horizon. Fragments indicate that it reaches a 

 much larger size than that above given. 



PHOS GABBII, Dall, new species. 

 (Phito XXIX, lig. 4.) 



I'hos rerafjiiaensh, Gaiu?, fieol. Santo Ddiuingo, p. 212, 1873, not of Kinds. 

 Phos moorei and elegant, Gabb, loc. <it., not of Guppy. 



The present species is most like P. fasciolatufi., from which it can be 

 instantly distinguished by its unarmed ftisciole, over which the sculp- 

 ture of the adjacent whorl passes without any marked interruption, 

 much as it does in /*. metuloides. There are 20 ribs on the last whorl 

 against 14 in P. J'asciolatus. There are numerous small callous ridges 

 on the pillar, which is anteriorly keeled. The shell is 21 mm. long and 

 11.5 mm. wide. 



1 Gcol. .lourii., XXII, p. 288, pi. xvii, fig. 2, 18n(). 

 -Trans. Wagner Free lust. Set., Ill, p. 51, pi. vi, iig. 4a. 



