Hurrox.—On Marine Mollusca. 215 
CycLOSTREMA FLUCTUATA, D. 8, 
Shell small, rather solid, spirally striated, not iridescent : colour yellow- 
ish white or pale brownish with irregular waved longitudinal bands of 
brown, which are rather indistinct. Spire depressed, obtuse ; whorls 4, 
rounded, distinctly and closely spirally grooved, the umbilical region smooth ; 
suture scarcely impressed: umbilicus narrow, deep. Aperture sub-rotund ; 
peristome acute, not continuous, the lower lip thickened. Operculum 
rather thick, sub-caleareous, translucent, white, round, of about six slowly 
increasing whorls. Diameter 11 inch. 
Hab. Foveaux Straits. 
Acoma CINGULATA, N.S. Plate xi., fig. 5. 
Shell moderately thick white oval, conical; apex about one-third of the 
length from the anterior end : about 30 to 50 low radiating ribs. Interior 
white, the margin light brownish pink banded with white. Length ‘56; 
breadth ‘45; height °2 inch. 
Dentition. Teeth very short and broad, the recurved portions three, 
arranged in an oblique line so that the anterior on each side are in juxta- 
position, while the posterior are widely separated ; all are short and blunt. 
Basal plates imbricating ; the posterior margin nearly straight, the exterior 
margin slightly, and the anterior margin deeply sinuated: no accessory 
teeth. 
Hab. Lyttelton and Dunedin. 
The shell in this species much resembles that of A. lacunosa, Reeve 
(=corticata, mihi), but the ribs are finer and the margin differently 
coloured ; the teeth however are very different. It may prove to be a 
variety of A. rubiginosa, the dentition of which is not yet known. 
KELLIA CITRINA, N. 8. 
Shell minute, ovato-rotund, smooth, finely concentrically grooved, sub- 
equilateral ; pale yellowish. Right valve without any cardinal teeth, the 
anterior lateral swollen and hollowed in the middle ; posterior lateral 
small. Left valve with a small anterior cardinal tooth; the laterals on 
each side thin. Length ‘08; height -07 inch. 
Hab. Tamaki Heads, near Auckland (T. F. Cheeseman). 
KELLIA SANGUINEA, N. 8. e 
Shell minute, ovato-rotund, smooth, finely concentrically grooved, sub- 
equilateral ; yellowish-white, the umbones bright pink. Right valve with 
an anterior broad triangular cardinal tooth, with a projection on its anterior 
face; anterior lateral small; posterior laterals two. Left valve with two 
small cardinal teeth disjoined at the base; anterior lateral single, getting 
thicker below ; posterior lateral single, bifid at the end. Length ‘08; 
height -07 inch. | 
