PROFESSOR E. P. WRIGHT ON THE TEREDIDÆ. 563 
Up to the present, then, the question remained thus :—the Serpula arenaria of Lin- 
næus was undoubtedly a mollusk, nearly related to the Zeredines. Sir Everard Home 
says that in the tube of. S. ( T.) arenaria both valves and palettes have been discovered ; 
and as Sir Joseph Banks probably saw some of Mr. Griffith’s recently collected spe- 
cimens, there is no reason to suppose that this was not really the case. Palettes un- 
doubtedly belonging to the animal that fabricated the tube have been discovered in it 
and described by Dr. J. E. Gray. These are identical with those figured by Home; but 
no valves were found in Dr. Gray’s specimen, though it is very hard to see how they 
could have been overlooked or lost; and lastly, Dr. Gray and Mr. Gould have described 
two species of Teredo which depart in no very striking detail either in appearance or 
habitat from ordinary well-known ship-worms; and the siphonal palettes of these bear 
a certain strong resemblance to those known as occurring in Kuphus. Dr. Gray’s speci- 
mens were in spirit, Mr. Gould’s apparently dry. The clearing up of this interesting 
subject is still a thing to look forward to, the chief point to be determined being the pecu- 
liarities of the animal inhabiting the tubes of Kuphus arenarius :—Is it generically the 
same as a Calobates thoracites, Gould, and Teredo furcelloides, Gray, or does it differ 
from them and agree with Kuphus mannii, sp. nov., hereafter described ? 
Although unable to settle this point, I still hope that the following description of 
some very well-marked ship-worms may not be without interest; and though I wish to 
express myself with all proper caution on the subject, I believe that, with the additional 
evidence thus afforded, I shall eventually prove not very far wrong in retaining Kuphus 
as a distinct genus from Calobates. : 
The following arrangement of the subgeneric forms of Teredo, based chiefly on the form 
of their siphonal palettes, will show my views more clearly. 
1. TEREDO, Linn:eus. 
Siphonal palettes simple, oblong, transverse, entire, rarely serrated or toothed. T. 
norvegica, Speng., T. navalis, Linn., T. megotara, Hanl., T. excavata, Lukis, &c. 
9. NausrrorA, P. Wright. 
Siphonal palettes, outer surface convex, covered with thick scale-like striæ, inner 
flat or slightly concave. N. dunlopii (freshwater, India), ? N. saulii, spec. nov. 
3, Kuruus, Guettard. 
Siphonal palettes with apex dilated, transverse, spathulate, with a central ea L 
an elongated, slender, cylindrical base. Siphons free throughout the greater part Q 
gth. K. arenarius (Linn.) ?, K. mannii, spec. nov. 
4. CALOBATES, Gould. | 
Siphonal palettes large, long, stilt-shaped ; siphons adherent, only becoming free at 
tips. C. thoracites= Teredo furcelloides, Gray, C. australis, spec. nov. 
5. XyLorryA, Leach. 
às iform, horny; lateral edges 
iphonal palettes elongate, penn ER Ae: 
Spongy texture. X. bipinnata, Turton, X. fimbriata, Aux 2 
with short filaments, 
