120 JOURNAL OF THE NEW JERSEY 



1. Doridella obscura, Ver. Body broad, oval; foot broad, cordate 

 in front ; head disk lunate, hollowed in front, forming tentacle 

 like projections ; dorsal tentacles small, stout. Body dark 

 brown, lighter toward the edge ; foot and tentacles white. L. 7^; 

 W. 5.— N. J. and north. 



Order NUDIBRANCHIATA. 



Sea slugs; animal destitute of a shell; mantle sometimes 

 large, usually small or none; gills usually project freely from 

 the dorsal surface ; hermaphrodite. These mollusks are found 

 from between tides to great depths. 



Family 43. DORIDID/E. 



Mantle large, without marginal appendages; skin generally 

 very spiculose ; dorsal tentacles laminate and retractile within 

 cavities. 



* Gills twice pinnate, and not retractile 3. Aeanthodoris. 



* Gills once pinnate. (A.) 



A. Gills retractile into a cavity /. Doris. 



A. Gills not retractile, head with a veil in place of oral tentacles 



2. Onehidoris. 



1. Doris, L. 



Body depressed or sub-convex ; skin spiculose ; mantle often 

 tuberculate, covering the head and the foot; gills plumose or 

 ramose, united at the base, and retractile with the vent into a 

 common pallial cavity ; mouth inferior, usually with two oral 

 tentacles. 



1. Doris tuberculata, Cuv. (Figs 28). Body oblong-oval, 

 slightly broader in front; gills forming a star of 9, simply pin- 

 nate plumes ; head very short, crescent-shaped, about the width 

 of the foot, pointed at the sides. Maroon color, darkened on the 

 sides by many dusky points; dark gray below. L. 35 ; W. 20. — 

 Mass. 



2. Doris repanda, A. and H. Body broad, depressed ; mantle 

 expanded widely beyond the foot ; gills forming a star of about 

 10, small, pinnate plumes ; foot narrow, truncated in front. Light 

 colored and covered with minute, white tubercles. L. 15 ; W. 12. 

 — New Eng. 



2. Onchidorts, De Bl. 

 Body depressed ; mantle large ; head with a veil in place of 



