66 M.0.A.L.MORCH’S REVIEW OF THE VERMETIDE. [Feb. 11, 
(Wiener Denkschriften, 2. Abth. 4. Band. 1852, p. 135, pl. 10). The 
latter author has mistaken the ear-capsules for the eyes (Troschel, 
Jahresbericht, 1852). The spermatozoa (or perhaps the sperma- 
thecze) are described by Siebold (Wirbellose Thiere, p. 344); in the 
same work (pp. 341, 345) are given some observations on the renal 
and mucous organs. Troschel has represented the teeth of 7. poly- 
phragma (Sassi) and T. decussatus (Gm.), which chiefly differ from 
the teeth of Siphonium nebulosum (Dill.) in having a little tooth more 
on each side of the rachial plait. The structure of the maxilla is 
represented by the same author (Gebiss, p. 155, pl. 13. f, 3). 
1. THYLACODES POLYPHRAGMA, Sassi. 
T. solitaria, irregulariter spiralis; anfr. sepe contigui teretiusculi, 
sutura dilatata, liris parvis longitudinalibus confertis sepe al- 
ternatim minoribus, confuse ruguloso-granosis, sepe liris validis 
3-4, nodulis remotis et punctis ferrugineis interpositis ; anfr. 
ultimus longus, leviter tortus, gracilis ; color sordidus e fulvo et 
flavido albescens. 
Diam. aperture 14 m. 
Animal capite, pede et limbo pallit purpureis aut purpureo-atris, 
puncetis albis maculisque sulphureis pictum; reliquum corpus pal- 
lidum albescens ; tentacula superiora brevia, crassa, conica, non 
retractilia, inferiora cylindrica, filiformia, acuminata, pallide 
annulata (Phil.). 
Serpula arcuaria, L. Knorr, Vergn. iv. p. 23, vol. i. t. 29. f. 5, 
1769. 
Serpula intestina, Salis-Marschlius, Reise, p. 358, 1793. 
Serpula arenaria, Lam. v. p. : 
Serpulorbis polyphragma, Sassi, 1. c., 1827; Fér. Bull. 1829; 
Poli, t. 1. f. 17 (Philippi) ; Delle Chiaje, t. 57. f. 1-9. 
Vermetus gigas, Gray, Figs. t. 58. f. 6 (copy). 
Serpuloides arenaria, Gray, Figs. iv. p. 83. 
Vermetus gigas, Phil. Chenu, Ill. pl. 4. f. 5. 
Dentalium intestiniforme, Lin. 1859; Hanl. MS. of Mus. Ulr. 
p- 49. 
Serpulorbis gigas, Adams, Gen. t. 39. f. 2 (optime). 
Var. a. ALETES. 
T. lateraliter affixa, fere regulariter spiralis; anfr. obliqui, con- 
tigui incumbentes ; anfr. ultimus interdum solutus, longus. 
Pe iiibi- lineolata, Gravenh. Tergest. p. 57. no. 3 (ex spm. 
orig.). 
Vermetus gigas, Biv. Nuoy. Gen. p. 9, t. 2. f. 1, 2 (Phil.); Phil. 
Enum. i. p. 170, t. ix. f. 18, and ii. p. 143. 
Serpuloides arenaria, Gray, Figs. iv. p. 83, t. 57. f. 2 (copy). 
Serpulorbis gigas, Biv. Ad. Gen. i. t. 39. f. 2 (copy) - 
Hab. In mare Mediterraneo; Tarento (Salis); Sicilia (PAil.); 
Genoa (Sass?). 
