412 
Subgenus 4. Pyxrpoma, Morch. 
26. JT. lacteus, Lam. Australia. 
27. T. tahitensis, Morch. Ins. Tahiti. 
28. T. anguille, Morch. Ins. Anguilla Antill, 
29. T. cylindrella, Mérch. Cape of Good Hope? 
I am much inclined to regard the subgenera as of generic value. 
Alphabetical List of the Species of the Genus Tenagodus. 
AMMONOIDEs (Serpula), Brocchi, Conch. Subapp. 1815, ii. p. 629. 
t. 15. f. 24. 7. teres polythalamica in spiram planam convo- 
luta. Fossile nel Racentino. The figure in Bourguell, t. 49. 
f. 309 sinistr., quoted by Brocchi, is very likely a Planorbis. 
Bronn (Lethzea) has shown that this shell is the young of Sili- 
quaria anguina. . 
ANGUILL2, Morch, n. sp. 
ANGUILUS (Siliquarius), Montf. Conch. Syst. 1810, ii. p. 39. 
f. 38. Is perhaps S. australis, Q. & G. 
ANGUINA (Serpula), Linn. S. N. ed. 10, 1758, no. 700. T’. tere- 
tiuscula, fissura longitudinali subarticulata. Founded on 
Rumph, t.41.f.H. The figure of Argenville, t. 29 H, repre- 
senting Siphonium nebulosum, Dillw., is, in the twelfth edition, 
made to refer to Serpula arenaria. 
ANGUINARIUS (Serpula), Born. Miswriting in Schum. Essai, 
p- 262, for Serpula anguina. 
ANNULARIS, Dillw. Cat. 1817, ii. p. 1081, no. 29. Serpula sub- 
cylindric, with annular contractions, and an obsolete longitudinal 
fissure. This name is founded on Le tire-bourre annulaire of 
Fayanne, i. p. 662. t. 8. f. G 2, copied from Buonanni, Recr. pl.1. 
f. 20 C (=Seilla, xii. f. 3; Mart. t. .f. 16; Karch. pl. 4. f. D; 
Wood, Index, f. 28). It is not quite evident if Favanne’s de- 
scription is made after the figure alone, or after specimens. It 
is not unlike S. anguilus, Montf. 
ARCHIMEDIS (Serpula), Konig, Descr. des Animaux Foss. de Bel- 
gique, pl. 9. f. 6-=S. anguina, according to Chenu. 
AUSTRALIS, Q. & G. Voy. de l’Astrol. ii. p. 302, 1833. TT. recta 
regulariter spirali, subcylindrica, transversim rugosa, longitu- 
dinaliter tenuissime sulcata, alba postice rubente. Long. 4 pouc. 
2 lig., diam. 8 lig. Port Western. This species is, according to 
Dr. Chenu, unique in the collection of the Jardin des Plantes ; 
but the figure in Illustr. Conch. pl. 1. f. 3 (copied from Chenu, 
Man. p. 322. f. 2310) differs in several respects from the descrip- 
tion. It can scarcely be called “‘ réguliérement roulée en hélice, 
dont les deux avant-derniers tours sont trés-rapprochés, sans se 
toucher cependant, et presque horizontaux ;” and p. 303: “ Il 
parait que c’est avec la partie postérieure du manteau que le Si- 
Kquaire oblitére sa fissure, toujours ouverte et non ponctue a 
