354 M. O. A. L. MORCh's review of the VERMETID.E. [NoV. 12, 



aperturam decurrentilus ; lamina superioris margine defiexo ; 

 varices maniciformes brevissitnce. 



Wurmformige Wurnu-6hi-e, Knorr, Samml. v. INIerkw. d. Natur, 

 1769, ii. 2. Abth. p. 288, t. 1 a. f. 9 (verisimiliter), from Piedmont. 



Serpula lumbricalis, Brocchi, Conch. Subapenn. 



Vermetus intortus, Bronn, Lethsea, iv. p. 283, t. 36. f. 18 ; Phil. 

 Enum. ii. p. 144. 



Serpula lumbricalis, Bronn, 269, Mus. Min. Hafn. 



Vermetus subglomeratus, D'Orb. Prod. iii. p. 169 (ex Bronn). 



Hab. Subapennine beds of Italy (Piedmont). 



Var. /3. CANCELLATA*. 



T. irregulariter spiraliter torta ; anfr. contigui, suturis depressis, 

 planiusculi, latere externo superne lirulis duabus obsoletis in- 

 terrvptis, inferne liris duabus validis incequalibus, lira superiore 

 scepe i7iterrupta, latere umbilicali liris 3-4 cequalibus ; lamince 

 interna tenues incequales, in anfr. pritnis a columella remotee, 

 in anfr. sequentibus in columella instructas ; rugcc incrementi 

 jwominentes apjjroximatcB, inde inter stitiis foveolatis, 



Vermetus intortus. Homes, Geol. Reichanstalt Wien, t. .p. 16. 



V. rugosus, Grateloup, Act. Bordeaux, ii. p. 161 (ex Bronn). 



Hab. Tertiary beds of Baden, Lower Austria. 



Var. y. wooDii. 



T. plerumque gregaria, teres, subquadrata, arete spirata, fere 

 tota a-ffixa, repens, striis transversis u?idulato-rugosis, li.neis 

 tribus longitudinaliter instructis, extremitate antica aliquando 

 libera, porrecta. 



Diam. ap. ^ lin. {S. Wood). 



Dale, Hist, and Antiq. of Harwich, 1730, t. xiii. f. 1. 



Vermetus intortus, S.Wood, Cat. Annals, 1842; Wood, Crag, 

 1848, p. 113. t. 12. f. 8 a. vix f. 8 6. 



Hab. Coralline Crag {S. Wood). 



The centre line is the most prominent, and forms the base or 

 keel of the volutions ; so that only two are visible where the shell 

 is regularly spiral, and one upon the base below. The shell, when 

 perfect, is covered with rugse in a transverse direction ; but the ter- 

 minal portion is smooth and free. In large masses the volutions are 

 irregular and inconspicuous, though the young shell may frequently 

 be traced by its regularly spiral form {Wood). The fig. 8 a seems 

 to show moniliform Mrse ; fig. 8 b, from a group of the Red Crag, 

 looks to be entirely different, and is probably a Serpula. 



14. Vermetus (Petaloconchus) pachylasma, Morch. 



T. solitaria,subcylindrica, irregulariter spiraliter torta, perforata, 

 albescens; anfr. cotitigui planiusculi, inferne angidati, latere 

 externo li^-is tribus pallide fuscis cequidistantibus, lira suturali 

 parva, lira angulari validiore, interstitio superiore lirula parva 



* Vermetus inforftis, Karsten, Verz. Verst. d. Sternb. Gestein., 1849, p. 19, is 

 perhaps to be referred to this variety. 



