88 THE NAUTILUS. 



parallel series just below, and the basis is marked by succeeding 

 rows of less prominence. Aperture rounded, ovate, and of a dark 

 chocolate color ; columella broad, excavated and produced below. 

 Exterior dull chocolate, brown above, paler below, with still paler 

 nodules. 



Dimensions : Altitude, 7"50 mm. ; latitude, 5* mm. 



While in its general facies it much resembles both Antillean and 

 Indo-Pacific forms hitherto described, a comparison with such as 

 most nearly approach it, indicate its non-identity. 



James Island, one example. Albatross collection. 



Witidella incerta Stearns. 



Shell small, rather solid, acutely ovate, spire elevated, pointed ; 

 whorls six to seven, moderately convex, with inconspicuous revolv- 

 ing grooves; upper whorls delicately sculptured with close set 

 rounded longitudinal ribs. Apex obtuse. Aperture nearly half 

 the length of the shell. Outer lip somewhat thickened with five to 

 seven denticles on the inner side. Columella with a single rather 

 prominent plait or tubercle just below the middle. -Surface colored 

 by five to six brownish-red bands, alternating with as many white 

 ones on the body whorl. 



Dimensions : Length, 6'02 ; length of aperture, 3 ; breadth, 

 2*75 mm. 



The above is based on a single perfect example collected by Dr. 

 Habel. It is nearer to Carpenter's millepunctata than to any other 

 west coast form, but exhibits color and other differences^when placed 

 side by side with that species for comparison. 



Galapagos Islands (special island not stated). Dr. Simeon Habel. 



Littorina (Tectarius) atyphus Stearns. 



Shell small, ovate subturrited, with five whorls ; the basal 

 traversed spirally by five principal obtuse keels or ribs, broken into 

 nodules ; of these the peripheral are the strongest. Between these 

 and below the lower of the stronger keels, fainter keels are percepti- 

 ble ; the penultimate whorl shows three rows of nodules ; of these 

 the two upper are the more prominent, and the lower one is sutural 

 and inconspicuous. Color dull ashen chocolate above, lighter below 

 the periphery of the basal whorl, and mottled below the lowest keel. 

 Aperture rounded ovate, dark colored ; columella somewhat exca- 

 vated and of a pale chocolate tiiit. Is ear the base of the columella 



