GASTROPODA. 1053 
Trochonema salteri.] 
TRocHONEMA (HUNEMA) SALTERI, 7%. Sp. 
PLATE LXXVII, FIGS. 42—48 
Shell 20 to 30 mm. in hight; width across the body whorl about three-fourths of the hight; apical 
angle about 65°. Whorls four or five, angular, with a gently concave slope above nearly to the suture, and 
an equally wide vertical flat peripheral band; base moderately ventricose, umbilicus extremely small or 
wanting; close to the suture a slight angularity. Of the two peripheral angles the upper is the more 
prominent, the lower being comparatively obscure, especially near the aperture. Lines of growth fine, 
crossing the whorls somewhat obliquely backward and downward, the direction being almost uniform on 
all parts; slightly sinuate on the base. Aperture obscurely triangular in outline, somewhat effuse below, 
with the inner lip nearly straight. 
Hunema strigillatum Salter is a higher shell, and differs more importantly in having the lines of 
growth turned forward instead of backward after crossing the upper of the two peripheral carina. 
T. salteri resembles species of Lophospira very greatly, and collectors may find it difficult to recog- 
nize unless they are fortunate enough to meet with good specimens retaining either the mouth or some of 
the surface markings. 
Formation and locality.—Lower half of Fusispira bed, Trenton group, Goodhue county, Minnesota. 
Collections— Geological and Natural History Survey of Minnesota ; E. O. Ulrich. 
Museum Register, No. 7375. 
TROCHONEMA (HUNEMA) NITIDUM, n. sp. (Ulrich.) 
PLATE LXXVII, FIGS. 44 and 45. 
Related to 7. salteri, but has a shorter and smaller spire, and proportionally larger and much more 
ventricose body whorl. The lower margin of the peripheral band also is more obscure, the upper slope 
more concave, the lines of growth very fine and more nearly vertical, the inner lip not so straight and the 
aperture less oblique and more ovate. The specimen illustrated may be said to be of the average size, 
though we have an interior cast of one that was fully twice as large. 
Formation and locakity—Utica group, Cincinnati, Ohio, and localities in the vicinity of that city. 
Collection.—H. O. Ulrich. 
TRocHONEMA (HUNEMA) ROBBINSI, 7. sp. 
PLATE LXXVI, FIGS. 11—15. 
This also is related to 7. salteri, yet may be distinguished very easily by its more depressed, subcon- 
ical, shape, much less ventricose base, perfectly even and longer upper slope, and more prominent and 
sharper lower angle. The umbilical perforation is very small and mostly covered by the reflexed inner lip. 
The specific name is given in honor of Dr. C. H. Robbins, of Wykoff, who first brought the shell to 
our notice. We are indebted to this gentleman for many good Specimens and courtesies while visiting 
his locality. 
Formation and locality—Fusispira bed, Wykoff, Minnesota. 
Collections.—Geological and Natural History Survey of Minnesota; E. O. Ulrich. 
Museum Register, No. 7516. 
TrocHoneMA (EUNEMA) SIMILE, 1. sp. - 
(Not figured.) 
This form is in some respects intermediate between . salteri and T. robbinsi, being more depressed 
than the former and not as much as the latter. The angles are slightly more prominent than in either, 
