1861.] M. O. A. L. MORCh's REVIEW OF THE VERMETIDjE. 163 



Vermicularia arenaria, var. o, i, c, Gravenh. Tergestina, p. 51 

 (ex specim. orig. ?). 



Var. 5. IMBRICATA. 



Serpulal dentifera. Sow. Gen. f. 6. 



Vermetus dentiferus, Gray, Philos. Trans. 1833, p. 816. 



Var. e. planorboides. 



T. affixa, carina submediana acuta, squamis remotis munita ; re- 

 ffione umhilicali bilirata, latere externo lirulis 6—7, interstitiis 

 lirida intercalante. 



Diam. 20 m., diam. ap. 5\ m. 



Hab. St. Thomas, ou Avicula columbus. Bolt. 



Var. ^. RUGOSA. 



T. antiquata et annulatim rugoso-striata ; anfr. primi liris gra- 

 nulosis, aperturam versus evanescentibus. 

 Diam. 7 ni. 

 Humphrey, Conchology, t. 10. f. 8. 



Var. T). ANAULAX. 



T. liris carens, lamina variciformi pone aperturam ampliatam, 



intus fascia basali castanea. 

 Diam. apert. 9 m. 

 Hab. Honduras (coll. Cuming.). 



Var. Q, FissuRATA. 



Anfr. ultimus conferte et regulariter annulatim rugosus. 



This variety looks very like a Siliquarius. 



Serpula dentifera. Lam., no. 24, var. b, testis majoribus subsoli- 

 tariis (Mus.), and var. d, testis subrugulatis, glomeratis, belong very 

 likely to this species ; it would at least be very remarkable if this 

 exceedingly common shell were not known to Lamarck. 



18. SiPHONiuM G^DEROPi, Morch. 



Serpula (an Vermetus 1) turboides, Chiereghini, Venez. 1847?; 

 Chenu, Monogr. du Spondylus, pi. 12. f. 3 ?. 



T. solitaria, contorta, spira affixa ; anfr. ultimus solutus, cos- 

 tulis spiralibus 1-3 squamis compressis remotis munitis, inter- 

 stitio dorsali bilirato ; stricB i?icrementi subtilissimce, arcuatim 

 flexee, hue illuc antiquatcB vel rufcB. Color albus vel sordide 

 carneus. 



Operculum superne profunde concavum, rufum, laminis spiralibus 

 confertis brevissimis appressis Jlavis, unde annulis angustis al- 

 ternantibus Jlavis et rufis, centroprofmde immerso fundo lato; 

 inferne convexum; impressio muscularis obscura, concentrice 

 rugoso-striata, sulco lato piano pallida terminata, centra obtuso 

 lato prominente pallido, limbo latissimo nitido, lineis A Jlavis 

 concentricis. 



Diam. 2f m. 



