30 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. 
recording such a second communication between the cesophagus and 
its cecum in V. musica. The only really conclusive method of 
determining points such as the one in question is by serial-sectioning.’ 
Radula.—The radula appears to be in every respect similar to that 
of Amoria Fischer (3) undoubtedly examined this organ from its 
lower surface, and arrived at quite an erroneous conclusion as to its 
true nature, since he describes it as of the formula 1—0—1, and 
haying a deep median furrow. Poirier (8) gave the formula as 1-1-1; 
but the supposed laterals, like those of Volutomitra, are almost 
certainly only the broken-off ends of the highly arched base of the 
rhachidian tooth. 
Merzerrra aupus (Jeffr.) [=IMeyerva pusilla, Sars |. 
May not this form, which by Sars (9) was referred to the Muricide, 
be more closely related to the Volutide? The shell has columella 
plaits which are quite as strongly developed as they are in some 
admitted Volutes; and the obviously inexact figure given by Sars 
of the alimentary canal is somewhat reminiscent of the Volutoid type, 
while the radula does not appear to be so very unlike that of Psephea 
“olutilithes. 
REFERENCES. 
1. Bouvier, EL. L.: Systeme nerveux, morphologie générale, et 
classification des Gastéropodes Prosobranches: Ann. Sci. Nat., 
Zool., sér. vit, tom. ii (1887). 
2. Bower, £. L.: Sur le Siphon cesophagien des Marginelles: Bull. 
Soc. Philom., sér. vill, tom. 1 (1889), pp. 13-14. 
3. Fischer, P.: Monographie du genre Hala, Risso (Priamus, Beck) : 
Journ. de Conch., tom. vii (1858), pp. 141- 158, pl. v. 
4. Mscher, P.: Sur Vanatomie des Lyria: Journ. de Conch., tom. xv 
(1867), pp. 849-356, pl. xi. 
5. Fischer, P.: Sur ?Animal du Voluta musiea, Linn.: Journ. de 
Conch., tom. xxvii (1879), pp. 97-106, pl. v. 
6. Gray, J. £.: On the division of Ctenobranchous Gasteropodous 
Mollusea into larger groups and families: Ann. & Mag. Nat. 
Hist., ser. 11, vol. xi (1853), pp. 124-1338. 
7. Gray, WE .: On the Teeth of the genus Jhtra, Lamarck : Ann, & 
Mag. Nat. Hist., ser. 1, vol. xii (1853), pp. 129-130. 
8. Poirier, J. : Recherches anatomiques sur l Halia Priamus (Risso) : 
Bull. Soe. Malac. France, tom. 11 (1885), pp. 17-50, pls. ii-iv. 
9. Sars, A. : Mollusca Regionis Arcticee Norvegie : Christiania, 1878. 
10. Schacko, G.: Radula Untersuchungen : Conch. Mitth., Bd. i 
(1881), pp. 122-128, pl. xxiv. 
1 It may be noted that Bouvier (2) has recorded that in Marginella cingulata the 
cesophageal cecum communicates with the @sophagus by two openings situated 
in close proximity to each other; and he regards the diverticulum as being in 
this case of a similar nature to that stated to exist in Halia, only that in 
Marginella the supposed loop has become obliterated by the fusion of its 
inner faces. 
