LORQUINIA 
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Lepidopleurus (Xiphiozona) hcathi, new species 
Shell small, strongly convex. Anterior valve with 100 or more 
radial series of flattened grains. Median valves similarly sculptured, 
the lateral area not raised and poorly defined. Tail valve with mucro 
much elevated and almost overhanging posteriorly , its slope strongly 
concave. Sutural laminae triangular. Girdle covered with minute, 
short, pointed spinelets, with larger scattered spines among them, 
particularly near the sutures as noted above. Color of shell a warm 
yellowish brown, copiously mottled slaty gray. 
Type Locality: Fifteen fathoms, off Monterey, California (Dr. H. 
Heath K 
Cyanoplax fackenthallae new species 
Chiton of moderate size, best described in few words by compari- 
son with C. lo-cvci (Pilsbry), which it resembles very closely, but is 
apparently somewhat larger ; light brown in color ; has the eaves lower, 
very much more finely porous, and (especially on valve i) more de- 
cidedly projecting; has less pronounced sculpture, though of similar 
nature to that of C.lowei, and the head valve less crenulate ; interior 
pure white instead of tinted ; tail valve with fewer ( 10 instead of about 
13), blunter, and coarser teeth; all valves have much less porous sinus 
and lines leading into the slits. 
Type locality: Pacific Grove, California (Mrs. C. S. Fackenthall). 
Mopalia egretta new species 
Closely allied to M. sinuata, but with the side slopes arcuate, 
lateral areas distinctly raised, sutures strongly dentate, and with the 
major girdle setae sutural in position, long, erect, and branching into 
numerous nearly straight, slender, needle-like aciculae. Color brownish 
red with maroon and buff mottlings. 
7\'pe Locality: Twenty fathoms, Forrester Island, Alaska (G. 
W'illett). 
Mopalia cirrata new species 
Shell of moderate size, oval, with slightly arcuate side slopes. 
Head valve with eight strong, somewhat tuberculose radial ribs and 
weaker sutural ribs, the interstices checkered by pits and squarish 
grains like basket work. Median valves with strong diagonal ribs; 
sutural ribs more or less obsolete ; the areas between with even, basket- 
like sculpture ; central areas on each side with some twenty arcuate, 
granulos riblets, strongly converging toward the jugum, and conspicu- 
ously latticed by a somewhat weaker system of curved transverse rib- 
lets; a narrow tract along the jugum smooth. Tail valve small, with a 
slightly elevated mucro and narrow, abrupt caudal sinus. Color of shell 
a soiled buff with brown suffusion and mottling. Girdle moderately 
wide, minutely scaled above and bearing an inner sutural series of ex- 
