134 AMERICAN JOURNAL 



color is obscured by the epidermis, but appears to consist of black 

 rays on a whitish ground. It is also a much narrower and pro- 

 portionally longer shell than the bimaculata. 



The above notes are taken from a large number of alcoholic 

 specimens. . Mr. Stearns kindly furnishes the following notes 

 upon a Chjpidella, which may be the callomarginata, as the de- 

 scription hardly agrees with the animal of bimaculata in regard 

 to the enclosure of the shell, though this may have been excep- 

 tional : 



"Body of the animal larger than the shell, but not covering 

 it except at the edges. Principal portion of body finely and 

 granulously rough. The inner margin near the shell and around 

 it ornamented with cream-white, radiating lines, not extending 

 to the outer edge of the body, which is thin, whitish and orna- 

 mented with black spots, with white lines radiating toward the 

 edge of the shell for a short distance. The white spots or por- 

 tions of the mantle between the black spots are papillose, or a 

 little produced toward the apex. Living at Monterey." 



FlSSURELLA VOLCANO, Rve. 



Dentition 1 — _ Jaw single, entire, hooked or 



30? (14 -i--i '? 30? ° ' 



pointed in the median line. Mantle extending a little beyond 

 the shell. Edge banded with black and colored spots corres- 

 ponding to the colored rays of the shell ; and with groups of 

 papillre separated by clear spaces, about eight on each side. 

 Margin around the hole black, papillose. Gills curved to the 

 left at their tips. Tentacles short, sub-cylindrical, pointed with 

 the eyes behind on their swollen bases. Muzzle short, cylindri- 

 cal. A row of papillas passing round the body as in Lucapina. 

 Anus as in the latter. Baulinas to San Diego, California. 



CHITONIDJE. 



NUTTALLINA SCABRA, (Rve.) Cpr. 



Abundant on the rocks at Mussel Point, Monterey, where 

 they can hardly be sprinkled with spray except in storms. In- 

 habits holes and crevices, growing thus into irregular shapes. 

 Also at Cypress Point, Carmel Bay, in similar situations. Not 

 found on low rocks which are covered with water at high tide, 

 but seems to delight in exposed headlands, where the breeze 

 comes in damp and strong from the sea. Usually much eroded 

 on the apices of the valves, but by what means I cannot deter- 

 mine. (Dall, MSS. 1866). 



