hells 
re ee Zealand 
Plate IT 
No.7 
Plate II 
No.1 
Plate IT 
No. 10- 
10a.-10b. 
HELCIONISCUS REDIMICULUS (helcion, a breast 
collar; redimiculus, a chaplet, or fillet ).—This limpet and 
the H. strigilis, after being recognised as two distinct species 
for quite a long period, were recently declared to be identi- 
cal with each other, one being held to be the adult, the other 
the juvenile form. Now they have once more been separ- 
ated and duly restored to their respective specific rank, a 
decision which anyone with a number of specimens at hand 
to study cannot fail to endorse. 
The H. redimiculus is an oval flattened limpet having 
twenty to twenty-five large rounded ribs, with rather wide 
intervals, each containing a low, inconspicuous riblet. The 
colour is greenish to grey, the ribs brownish, with a few 
white patches scattered promiscuously about. Internally, 
the central area is yellowish brown, paler at the apex or 
cream colour, bordered with olive behind; the margin is 
rayed with yellow and coffee-coloured brown. The ex- 
treme edge is broadly and slightly toothed. Fine growth 
lines are to be observed in the intervals between the ribs. 
Found at Waikouaiti; St. Clair. 
HELCIONISCUS STRIGILIS (helcion, a breast collar; 
strigilis, a scraper).—A fairly large limpet, about two 
inches in length, sculptured with twenty to thirty rather 
large and roughish ribs, each interval having a smaller rib, 
the former of which reach from the margin to the apex, 
the latter extending only half the distance. It is of a dark 
brownish colour; internally iridescent, brownish grey with 
dark rays corresponding to the ribs. The central area is 
cream or pale brown. The whole shell is thickly built. 
Found at Shag Point, and at the Auckland Islands. 
HELCIONISCUS STELLIFERUS (helcion, a breast 
collar; stelliferus, star-bearing).—A limpet rather flattened 
in shape, with ten to twenty ribs cut up into granules by 
slight concentric furrows. In colour it is reddish brown or 
ash grey, with white rays at the apex forming a star, the 
points of which extend even to the margin in some in- 
stances. The interior is iridescent with a brilliant platinum 
lustre; the central area is chestnut brown, showing the 
star when held up to the light. Numerous radiating 
grooves are seen internally, corresponding to the external 
ribs, and there is a narrow edging of dark brown bordering 
the margin. As this species can only be obtained at ex- 
treme low tide, it is usually found covered with dense 
incrustations, but clean specimens may be prepared by 
soaking the shells in methylated spirits for several weeks, 
18 
