4 THE NAUTILUS. 
This species resembles L. matildae Dohrn, and may eventually be 
classed as a variety of that species. The peculiar color markings 
constituting the chief differences. The red color within is always 
present. Over 60 specimens received. 
Diplommatina liwaensis n. sp, PI. I, figs. 3, 4. 
Shell dextral, fusiform, thin, sculpture fine and close, covering all 
the whorls, color pale brown, whorls rounded, apex not acuminate, 
suture impressed, whorls seven, antipenult. largest, constriction in 
front. Aperture ovate, outer lip reflected, columellar tooth small. 
Maj. diam. 1$ mm., alt. 4 mm. 
Locality: Liwa, at 4,000 ft. altitude. 
Close to D. gracilis Beddome, but has much finer sculpture, is 
larger and has one more whorl. 
ON A NEW SPECIES OF FUSUS FROM CALIFORNIA. 
BY WM. H. DALL. 
Fusus Roperi n. sp. 
Shell small, rather short and wide, with a short, subacute spire 
and about six whorls; color ferruginous brown, faintly spirally 
zoned and lighter on the siphonal fasciole, pillar and throat whitish, 
outer lip between the white of the throat and the margin showing 
narrow spiral brown lines on a yellowish ground, whorls with a ten- 
dency to a white, narrow peripheral line most evident on the sum- 
mits of the ribs; whorls excavated behind, somewhat rounded before 
the periphery, the margin at the suture strongly appressed with the 
whorl in front of it somewhat constricted ; suture distinct, hardly 
undulated, the spiral thread in front of it slightly minutely imbri- 
cated ; axially directed sculpture of finely wrinkled silky incremen- 
tal lines and (on the last whorl) nine rounded ribs with rather 
wider interspaces, the ribs are obsolete near the suture, on the early 
whorls, and on the base; spiral sculpture of numerous flat strap- 
like threads with the interspaces much narrower and sharply reticu- 
lated by the incremental sculpture which rises in the interspaces 
nearly to the level of the tops of the threads ; the nucleus (lost) is 
small, the first two or three whorls are more coarsely reticulate than 
the later ones; aperture elongated and insensibly passing into a 
rather wide and short canal; siphonal fasciole rather marked, 
