F. island icus does to F. gracilis." Forbes and Hanley describe the 

 egg capsules of F. norvegicus as being found in odd valves of Cardium 

 echinatum. Jeffreys describes the egg capsules of F. norvegicus as 

 compressed hemispheres each holding from two to four embryos. 

 Capsules of F. propinquus are attached to odd bivalves. I have found 

 the capsules of F. pygmxus attached to the inside of a shell of Cardila 

 borealis. Each capsule contained five embryos. 



FUSUS DECEMCOSTATUS Say 



PI. VI. Fig. 38. Length 75 mm. 



Body whitish, slightly mottled with black, mottling thicker near 

 opercular lobe; tentacles very short and wide apart, base of tentacles 

 thickened, supporting eyes. 



TROPHON CLATHRATUS Lin 



PI. VL Fig. 39. Length 14 mm. 



The tentacles are long, united at their bases and for 2-3 their 

 length are thickened supporting the eyes, beyond attenuated. The 

 animal is uniformly white. The creature is active but not timid. 



BUSYCON CANALICULATUM Say 



PI. VL Fig. 40 Length 150 mm. 



Body deeply maculated with black and slate colored blotches, 

 tentacles wide apart, long and stout, pointed at their ends, maculated 

 like the body, tips black, eyes on thickened base at lower third of 

 tentacles. Foot broad, rounded in front, strongly auriculated. 

 Ovulating September 7. In ovulating the creature was retracted 

 within the shell, the egg capsules issuing between the edge of the 

 operculum and the outer edge of the aperture (Fig. 40, A, PI. VII). Figure 

 40, (B), PI. VII, shows the appearance of the proximal end of the 

 string of capsules. The creature first secretes in the mud a broad 

 firm base and rough irregular beginning of the string as an anchor, 

 these strings float vertically and mixed with the forest of eel grass 



19 



