:Pam. 46.] NATURAL HISTORY SOCIETY. i^ 



•quincunx; these i^ills carve buckward and inward, formincr 

 'urches over the back ; tentacles about equal in length ; foot with 

 the front angles prolonged into large tentacular appendages. 

 Drab-colored, with white or silvery lines on tail, back of oral 

 tentacles an.d tips of gills. L. 25^ W. 7. — Mass. 



2. FlaheUina rufihrnncMalis, Joht. Body slender, gradually 

 tapering ; tentacles about equal, long and slender ; gills slender 

 almost linear, arranged in 6 or 7 clusters on each side, each cluster 

 having from 2-6 rows of 4 each ; anterior angles of foot prolonged. 

 Body watery-white, with an opaque line on the back ; interior of 

 gills bright vermilion, with an opaque white ring near the tip. 

 L. 25-36:; W. 4-6.— New Eng. 



4. CoRYPHELLA, Gray. 



Upper tentacles simple ; angles of foot produced ; middle part 

 ■of jaw denticulated. 



1. Coryphella rutilla, Ver. Foot broad, pointed ; front angles of 

 the foot very long; head small, rounded, often notched in front; 

 mouth large, nearly terminal ; gills numerous, long, slender, 

 slightly fusiform, arranged in 8 or 10, usually well separated, 

 transverse clusters, mostly of 2 rows each, 6-8 in each row, 

 clusters crowded in front. Color yellowish-white, translucent ; 

 dorsal tentacles pale yellowish, usually tufted with white; gills 

 with vermilion nucleus, the tips flake-white. L. 48 ; W. 7 ; 

 dorsal tentacles 10 ; oral 9 ; gills 9^. 



2. Coryphella gymnota, Cout. Body slender and tapering to a 

 tine point; head small, rounded, and with a distinct neck; ten- 

 tacles four, the oral ones rather longer, and the dorsal ones with 

 very fine wrinkles at the sides : gills club-shaped, short, arranged 

 in 7 clusters of about 5 each, on each side. Pale, watery-drab 

 color ; gills transparent, but filled with reddish-brown dots. L. 

 25 ; W. 2-i-. — Mass. On sea weeds. 



3. Coryphella Stimpsonii, Ver. Foot broad; auricles small, 

 short, triangular, often directed backv*''ard ; head large, broad, 

 rounded in front, with distinct, rounded lateral lobes ; tentacles 

 slender; branchiae numerous, crowded, fusiform. Color yellow- 

 ish-white with a flake-white line on the upper side of foot; ten- 

 tacles tinged with salmon and specked with white ; branchiae with 

 salmon, yellowish to reddish-brown nucleus and specked at the 



