338 M. O. A. L. MORCh's review of the VERMETIDiE. [NoV. 12, 



lahrum versus carinatis ; camera externa majore, reniformi ; 

 plica una centrali, columellari. 



Diam. spirae "4, aperturse "l poll. (Carp.). 



Petaloconchiis renisectus, Carp. Proc. Zool. Soc. 1856, p. 315, f. 5. 



Hah. Ill Oceano Indico {coll. Cumingii). Described from a 

 large group of very regular growth, which from its accretions, Car- 

 penter supposes to be East Indian. A large flat crust, which I 

 suppose is the one described, does not show any other accretions ex- 

 cept an imbedded Isoynomon, very like the I. perna, L., represented 

 by Dunker in Moll. Guineensia, t. 8. f. 10 — a form I do not know 

 as East Indian. 



2. Vermetus varians, D'Orb. 



T. irregulariter convoluta, longitudinaliter riigoso-costata, vel Ice- 

 vigata, violaceo-fusca. 



" Coq. ornee de 6-7 sillons irreguliers. 



"V animal. La couleur en est violet fonce; la masse ccphalique 

 poussce lateralement, au contraire, tres-fouce ; I'opercule et le pied 

 sont d'un violet tres-pale. Le manteau a sa partie anterieure est 

 horde de rouge de carniin ; le reste du corps, en dedans, est simple- 

 ment rose en passant au jaune ; on remarque neanmoins, a la partie 

 superieure, uue large bande violette, mediane, accompagnee de chaque 

 cote d'une autre moins foncee, qui se perd en approchant de I'ex- 

 tremite du corps." — D'Orb. 



Operculum orbicular, thin, nucleus central {Gray) ; apparently 

 paucispiral, like that of Serpulorbis * made nearly flat {Carp.). 



Vermetus varians, D'Orb., Voy.l'Am. Mer. p. 456, t. 44. f. 7-10. 



Serpuloides varians. Gray, fig. 4. p. 83, t. 128. f. 1. 



Serpulorbis varians, D'Orb., Adams, Gen. i. p. 357- 



Petaloconchus varia7is, Morch, Journ. Conch, viii. p. 41. 



Vermetus varians, Gray, Brit. Mus. Cat. (Moll. Am.), p. 47. 

 no. 405 (operculum); Carp. Proc. Zool. Soc. 1856, p. 315 (operculum). 



Hab. Rio Janeiro ; " tapissant le fond des plaques d'eau salee, 

 sur les rochers des environs de Rio, au niveau des plus hautes 

 mare'es de syzygies. Comme les lieux ne re9oivent de I'eau que tous 

 les quinze jours, celle qui y reste est tellemeut concentree, que sou- 

 vent elle se cristallise sur les bords." — D'Orb. 



I have compared two rolled crusts from Montevideo (in the col- 

 lection of Mr. Alfred Benson), which do not differ materially in ex- 

 terior shape from var. fl of the preceding species. The laminae, 

 agreeing very well with figure 4 of Carpenter, are angulated on 

 the edge ; in one instance the larger lamina is rectangularly bent in 

 the middle, both sides being equal. The lamina looks generally 

 rather thick, particularly at the base. 



It is doubtful if this species is in reality different from V. adan- 

 sonii, Daud., notwithstanding the differences in the description of 

 the animal. Dr. Gray's and Carpenter's description of the lid is 

 after D'Orbigny's original specimen. 



* Very likely a misprint, this genus having no operculum. 



