1861,] M. o. A. L. morch's review of the vermetid.e. 343 



Bivonia decussata, Chenu, Man. p. 320, f. 2303 (verisimiliter). 



Hab. lus. St. Thomas. 



The whorls of this form are exceedingly long and narrow ; it is 

 generally solitary, but frequently from two to four specimens are 

 agglomerated. Gualtieri's figure is very good ; but I do not under- 

 stand the small black spots mentioned in the text and marked on 

 the figure ; perhaps they are produced by a foreign matter in the 

 grooves. It has often twice as many whorls. 



Var. e. proboscis (Thylacodus). 



T. soUtaria affixa, anfr. depressis, suturis expansis, anfr. ultimo 



longo porrecto albescente. 

 Tubulus testaceus solitarhis anguinus (Mart. i. f. 15). 



Serpula conica. Wood. Index, t. 38. f. 22, p. 186 (copy). 

 Hub. West Indies, on Cytherea macidata (^Martini). St. Thomas 

 {Riise) . 



Var. f. RETiFERA (Aletes). 



T. axjglomerata, vertice affixa, spiraliter torta, castanea velferru- 

 ginea, lineis transversis saturatioribus ; anfr. fere ubique conti- 

 gui, ampli (nee gracUes), liridis longitudinalibiis latiusculis no- 

 didosis, interstitiis subcequalibus punctatofoveatis ; rugce in- 

 crementi regidares, in intersectionibus subnodosce ; anfr. ultimus 

 longus, porrectus, cylindricus, pallidus ; columella sespe badia, 

 lira elevata mediana. 



Diam. apert. circ. 5 m. ; anfr. penult, circ. 8 m. 



Operculum tenue, flavum, superne concaviusculum, vix spirale ; 



inferne area imisculari plana subimmersa, peripheriam versus 



sidco divisa, opaca, concentrice conferte et subtilissime striata ; 



limbo lato nitido convexo oblique striolato, sulcis obsoletis con- 



centricis 1 vel 2. 

 Diam. 3 m. 

 T. fetalis {nondum nuta) Bulimoidea, subcylindrica, apice bullato; 



anfr. 2k, convexis, sutura profunda ; apertura obliqua rhom- 



boidea, inferne subeffusa; columella recta, inferne producta ; 



labro supej-ne leviter retuso. 

 Long. circ. 1^ m. 



Humphrey, Conchology, t. 10. f. 14, sed anfr. ultimo incompleto. 

 Fermetus conicus, Dillw., Morch, Journ. Conch, vii. pp. 346 & 

 347, viii. p. 38. 



Ilab. St. Thomas, a group on Strombus accipitrinus, Mart. 

 (Riise). Coll. Cuming. 



This form is closely alUed in sculpture to Jletes centiquadrus, and 

 in shape perhaps differs from the var. F. peronii, Val., as repre- 

 sented in Chenu, 111. pi. 4. f. 6, only in the rather smaller calibre of 

 the tubes. On a group closely resembling Chenu's representation are 

 several young ones, as described under var. o, affixed chiefly on the 

 erect apertural tubes (Coll. Riise). I have seen this dletes pass so 



