1861.] M. O. A. L. MORCh's REVIEW OF THE VERMETID^. 329 



Serpula spirorhis contraria, Chemn. ix. p. 140. 



S. spirorbis, orbiculata sinistra, Chemn. ix. p. 151, f. 999. 



S. spirorbis ft, Gm. S. N. 3740. 



iS. spirorbis, var., Dillw. p. 1073. 



Spiroylyphus contrarins, Morch, Journ. Conch. 18.59, vii. p. 45. 



Sab. On Polydonta granularis, Bolten : from Tranquebar. 



I have seen several specimens on the shell represented by Chemnitz ; 

 but they do not seem to differ from the preceding, except by burrowing 

 very deeply, in such manner that the sides are entirely concealed, and 

 the surface is sunk to the same level as the surface of the Trochus ; 

 but this appears only to depend on the nature of the outer layer of 

 the Trochus. 



Var. Q. ERYTHR^ENSIS. 



T. albescens, intus castanea, laminis incrementi tenuissimis con- 

 fertis brevibus sigynoideis ; anfr. aperturam versus solutus cy- 

 lindricus. 



Operculum superne convexum, inferne concaviusculum, margine 

 peripherica angusta elevato bipartito, parte interna purpurea, 

 externa Jlava ; mammilla centrali Icete aurantiaca. 



Hab. On Area foliacea, Forsk., from the Red Sea {Mus. Reg.). 



Var. I. DiscuLus. 



Operculum superne convexiusculum ; inferne planiusculum, area 

 immersa bipartita, disco centrali lato atro concentrice lirato, 

 zona externa angusta nuda ; mammilla centrali aurantiaca ; 

 limbo latiusculo leviter elevato nitido bipartito, parte interna 

 saturate purpurea, externa sanguinea. 



From the same shell as the preceding. 



2. Spiroglyphus ammonitiformis, De Serres, 1855. 



Coq^. " discoi'de, a tours continus et arrondis, differe de la S. spi- 

 rulceformis, en ce que les derniers tours ne se detachent jamais des 

 premiers, et qu'ils sont fortement stries. 



"Grand diam. 0'»-020 a 0-021 ; petit diam. 0'"-016 a 0-017." 



Stoa ammonitiformis, De Serres, Ann. des Sc. v. p. 240, t. 8. f. 2. 



" Sur les valves de la Perna isognomon, coquille bivalve des mers 

 des Indes.'' 



I do not know this shell ; perhaps it is more allied to Stoa per- 

 forans, which is like it in respect of the aperture. 



3. Spiroglyphus planobis, Dkr. 1860. 



T. solidula, alba, planorbiformis, carinata, transversim sub- 



lamellosa. 

 Lat. vix 4 m. 



Vermetus planorbis, Dkr. Mai. Blatter, vi. Jan. 1860, p. 240. 



Hab. Decima Harbour, Japan {Dr. Nuhn, Mus. Heidelb.). On 

 Vermetus imbricatus, Dkr. ; slightly immersed in the surface. 



