1861.] M. O. A. L. MORCh's RKVIEW of the VERMETIDjE. 359 



fiuement strie, comme ceux-ci ; je n'ai jamais trouv^ le bout comme 

 dans les Serpula tubulus (Eichvv.), avec lequel M. Bvonn I'a reuni." 

 — Eichw, 



Note. — I place here the three following forms, only known to me 

 from single specimens. They have some resemblance to the genus 

 Anel/uin of the family Ceecidce, which seems to have the same rela- 

 tion to Vermetus as Spirorbis to Serpula. Notwithstanding the 

 peculiar annular sculpture and hyaline texture, I suppose they will 

 prove to be forms of Vermeti, modified from growing iu sheltered 

 places. I have sometimes seen a somewhat similar sculpture and 

 colour on the first whorls of Vermeti conieus,varians, and renisectus, 

 but not so distinctly that I could with perfect security refer them 

 to any fixed species. 



19. Vermetus (Thylacodus) balani-tintinnabuli. 



T. solitaria, lateraliter affixa, alba, nitescens ; anfr. teretes, con- 

 tigui, suturis profundis, costis acutis parvis subremotis coqui- 

 distantibus ; anfr. ultimus partim solutus, suberectus, Icevius- 

 culus ; umbilicus pervius. 



Diam. ap, circ. 1| m. 



Hab. On a valve of Balanus tintinnabulum (Mus. Reg.). 



Var. a. crystallina. 



T. anfr. obliquis costis acutissimis, regularibus. 

 Hab. Ins. Philippin. 



20. Vermetus (Strebloceras??) anellum, Morch. 



T. sinistralis, Candida, spira affixa, spirorbiformis, umbilico aperto; 



anfr. paiici, ultimus solum adspectabilis, rapide crescens, peri- 



pheria dilatata, costis transversis acutis validis, leviter Jlexis ; 



apertura soluta, subovalis, latere inferno dilatato, recto, superne 



et inferne avgulo recto. 

 Diam. testse circ. 2 m. ; diam. ap. | m. 



Var. a. Costis acutis parvis confertis. 



Diam. testae fere Si m. ; apevturae 1 m. 



Hab. California, on Haliotis tuberculatus (Reeve), with Sipho- 

 nium megamastus (Morch). 



This shell, which perhaps will prove to be the type of a new genus, 

 is very like a large Spirorbis in shape ; but it looks to me in the 

 texture quite a Vermetid. The shape of the inside of the aperture 

 is exceedingly like that of a Separatista. I refer this species pro- 

 visionally to the genus Strebloceras, which I only know from Car- 

 penter's description in these ' Proceedings,' 1858, p. 440. 



Subgenus 3. Macrophragma, Carp. Cat. p. 308 (olim). 



Lamince internee versus medium columellcB instructce ; lamina su- 

 perior acie angulata dejlexa, extus bicarinata. 



Opercidum (specierum duarum) parvum, tenuissimum, corneuin, 

 Iceve, subplanatuni, vix spirale. (Carp. Cat. p. 308.) 



