24 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. 
The racemose glands, which are the homologues of the single pair 
met with in the less specialized forms, present a peculiar ‘ fluffy’ 
appearance, and in colour are translucent white, while the tubular 
glands are yellowish and opaque. 
The ducts of the racemose glands are at first straight, of fairly large 
calibre, and quite free from the cesophagus, standing out at right 
angles, one on each side of the latter, at a point just outside where 
it emerges from the introvert. After meeting the cesophagus the 
salivary. ducts are continued forward as very delicate convoluted tubes 
of diminishing calibre, which run along one on each side of the 
cesophagus, and are closely bound up with it. 
The tubular glands (Fig. 2) lie entirely within the introvert when 
the latter is extruded, but upon its retraction they project freely into 
the body-cavity. They are convoluted throughout the major portion 
of their course, but for a short distance from their distal extremities, 
which are marked by a slight pyriform enlargement, they are quite 
straight. ‘his short terminal segment is directed forwards: the tube 
then bends sharply upon itself, and becomes much convoluted, while 
its calibre undergoes regularly progressive diminution. Upon nearing 
the radula-sac, the tubular salivary glands, now extremely fine, pass 
suddenly under the cesophagus, and meeting, give off at right angles 
a single, very delicate duct, which passes forward under the radula-sac. 
Radula.—\ am not at all certain that the radula of Voluta musica 
is represented with perfect accuracy by the familiar formula 0-1-0, 
since the uncleaned preparation of this organ showed what may 
possibly be the extremely minute, shapeless vestiges of lateral teeth. 
The functional teeth (Fig. 4) are of the rastriform ’ type, so well 
described and figured by Fischer (5). ‘The number of denticles 
appears to be inconstant: Fischer's example showed twelve well-formed 
cusps, with, on one side, three intermediate denticles. . 
Nervous System.—The most important point regarding the nervous 
system (Fig. 3) is the quite considerable length of the mght pleuro- 
visceral connective; the supra-intestinal ¢ eanglion occupying its more 
normal position close to the osphradium, instead of being intimately 
related to the nerve-ring, as in the Volutes described by Martin F. 
Woodward. 
Conclusions.—As will be seen, Voluta musica does not differ in its 
anatomy from those few Volutide of whose structure any details are 
at present known, to such an extent as to justify its separation from 
the other members of that group, the most evident deviation being 
in the radula; but even in this feature there are indications, as will 
be pointed out, of the existence of an intermediate type in Lyria 
deliciosa, and further links may reasonably be anticipated to exist 
among the large number of species of w hose anatomy nothing is as 
‘yet known.! Moreover, it must be remembered that the taxonomic 
1 Since this paper was written I have been enabled to examine the radula of Lyria 
nucl us, Lam.: this exhibits a most perfect intermediate stage between the 
V. musica aud the Lyria deliviosa types. 
