248 NAUTILUS. SAIL-SHELL. Class VI. 



9. crassu- Lin. TV. viii. 117. Mont. Test. Br. 191. id. 



hVS - Sup. 79. t. 18. /. 2. 



* N. with a thick shell, umbilicated on both 

 sides ; joints marked with lines ; minute. An 

 inhabitant of salt water. 



Exceedingly rare. From Reculver. 



10. lobatu- Serpula Nautiloides. Gm. Lin. Serpula lobata. Mont. Test. 

 3739. 

 Lin. Tr. viii. 117. 



LUS * 3739. Br. 515. id. Sup. 160. 



* N. with a shell rather plane, confluent, verru- 

 cose, spiral ; septa very delicate, and half-moon- 

 shaped; minute. 

 Inhabits the sea. 



#* 



Longish, and somewhat strait. 



11. SEMiLi- Gm. Lin. 33"2. Mont. Test. Br. 196. id. 



tuus. Lin. Tr. viii. 118. Sup. 80. t. 19. /. 3. 



. * N. with a strait shell, the end spirally bent, 

 spires contiguous ; minute; inhabits the sea. 

 Sandwich and Sheppy island. 



