APPENDIX. 



22. SERPULA FUSCATA. 



S. testu irregulariter coiitorta; lineis clevatis, inter- 

 ruptis, obsoletiusculis; colore violacco-fusco. 

 Ohs. A specimen of this shell is named Serpula 

 fuscata in Mr. Geo. Humphrey's collection. The 

 tube is very large, being moi'e than an inch wide in 

 some parts. 



23. SERPULA MAXIMA. 



S. testa irregulariter contorta, Ipeviusculd, caring dor- 

 sali antice in spinam nonnunquam desinente : apcr- 

 tura expansfi, testarum juniorum subtrigonS, oper- 

 culo corneo. 



Ohs. Several specimens of this species exist in 

 the collection; they are attached to, and some of 

 them deeply imbedded in coral. It is a very large 

 species, the tubes being almost an inch wide. The 

 aperture in the older shells is round. 



24. SERPULA TRICUSPIDATA. 



S. testa clongata, tenui, trigona, basi affixii, denium 

 porrectH ; carina dorsaliprimumdenticulatil; aper- 

 tura tricuspidata. 



Ohs. Two specimens of Terebratula vitrea in 

 this collection are adorned with several of this sin- 

 gular species of Serpula, which docs not appear to 

 he noticed either by Lamarck or Dilhvyn, although 

 it has beeu Icjng known to collectors. 



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