ANTENNAT^. 159 



Genus 14.— SILIQUARIA Lamarck. 



Generic Cliaracter. — Body tubular, but not well known. 

 Shell tubular, in'egularly contorted, posteriorly attenuated, 

 sometimes spiral at the base, and open at the exterior end, with 

 a longitudinal, subarticulated slit, which continues its whole 

 length . 



Siliquaria anguina The Snake-like Siliquaria. Plate 



XIX. fig. 24. Shell taper, undulating, with a longitudinal fis- 

 sure ; spiral at the extremity. Inhabits the Indian seas. 



ORDER II.— ANTENNAT^. 



The head is antenniform, and provided with eyes ; and having 

 a projectile proboscis frequently furnished with jaws ; and seta- 

 ceous papillae, which are pediform and retractile; the branchiae 

 are longitudinally disposed. 



Section I. — Branchias arranged in the form of complicated 

 tufts or leaflets, or ramose, constantly large and apparent ; with- 

 out spines. 



TRIBE I. AMPHINOM^. 



Branchiae and cirri placed above, beside all the pairs of 

 papillae, which are foot-shaped ; destitute of jaws. 



o2 



