genitalia projecting from the right side is globular in shape with a 

 curious claw-like process on one side (Fig. 21, A). 



VELUTINA ZONATA Gould 

 PI. IV. Fig. 22. Length 12 mm. 



Head broad, tentacles wide apart, not pointed, eyes on distinct 

 shoulders. Body translucent white, mottled with opaque white 

 spots, tentacles strongly mottled. Mr. Dwight Blaney has figured 

 a specimen of this species with a double eye on the right side. 



LAMELLARIA PERSPICUA Lin 



PI. IV. Fig. 23. Length 12 mm. 



The only sketch I had of this creature shows it from below. The 

 foot has an irregular indented margin. Mr, Dwight Blaney has 

 some remarkable drawings of this species which, I trust, he will soon 

 publish. 



NATICA HEROS Say 

 PI. IV. Fig. 24. Length 60 mm. 



The animal is more elongate than that of A^. duplicata. Its color 

 is light gray, the tentacles are light grayish in front, darker behind, 

 very broad and flattened at the base and tapering to a point; a sharp 

 angular depression is seen at the base of the tentacles. The foot 

 below is yellowish. The propodium forms a sloping shield resting 

 against the shell, it is closely wrinkled and a beautiful mouse-gray. 

 The left side of the propodium is developed into a large, round ear- 

 like opening into which the water may be seen pouring constantly, a 

 veritable syphon, in fact. This syphon may be directed forward or 

 backward. When the proboscis is extended the propodium is sharply 

 cleft to make room for it, as shown in Fig. 24, (A). The protoconch 

 is shown in Fig. 24, (B), PI. IX. The protoconch presents in general 

 outline that of the adult, the proportions, however, are widely differ- 



14 



