1-22 JOURNAL OF THE NEW JERSEY' 



strong lamellae ; gills 8, large, bipinnate, the 2 back ones smaller^ 

 ill united by a web. Yellowish flesh-color, translucent. L. 25:., 

 W. 8 ; dorsal tentacles 6. — 



2. Acanthodoris steUata. Body broad, oval, wider in front; back 

 convex, covered with numerous, small, scattered, pointed papillae: 

 gills forming a star of about 7 bipinnate plumes, the subdivis- 

 ions fine and slender. Color very variable : often purplish-brown ^ 

 sprinkled with yellowish tips ; gills purplish at base with yellow- 

 ish tips, sometimes with star like markings. L. 25; W. 12.— 

 N. Y. and north. Under stones at low water. 



Family 44. POLYCERID/E. 



Gills forming more or less of a circular crown on the middle 

 ^f the back, surrounding the vent; mantle small or none ; skin 

 usually spiculose, our species with dorsal tentacles non retractile. 



* Gills once pinnate 1. Idalia. 



* Gills twice pinYiate. A, 



A. Gill plumes 3 2, Aneula 



A. Gill plumes 5 ...3. Polyeera... 



1. Idalia, Leuc. 



Body convex, smooth ; mantle small, wdth long filaments 

 around the edge ; head produced in front ; dorsal tentacles linear, 

 laminated; gills simply pinnate, non-retractile. 



1. Idalia 2^ulcheUa, A. and H. Body ovate; mantle small, pro- 

 duced in front, with four filaments set on an expanded pallial or 

 velar ridge ; lateral filaments five on each side, the last large and 

 bifid ; dorsal tentacles club-shaped, laminated for three fourths 

 their length; gills 11 (the front one bifid), rather small dimin- 

 ishing backward. L. 10. — New England. 



2. Ancula, Lov. 



Body slug-form, smooth ; mantle very indistinct, near the gills 

 bearing one or more appendages; head produced at the sides 

 into tentacular appendages. 



1. Ancida sidphurea, Stim. Body slender; dorsal tentacles 

 large, club-shaped, the upper third with about 12 laminae ; gill 

 plumes twice pinnate, three in number, arranged in a half circle, 

 the middle one largest ; these are surrounded by 8-j 2 tentacu- 

 lar processes; foot narrow, rounded at the sides. Very light 

 brownish, transparent ; the dorsal tentacles, and the tentacular 



