34 MOLLUSCA. 
tigrinum. Its inhabitant is most peculiar; having, besides the usual 
anal lappet of Nanina covering the mucus-pore, six smaller ones. 
When these are erect, the animal has somewhat the aspect of a scor- 
pion. Perhaps the checkered colouring of the figure is derived from 
the colours of the animal within, showing through a transparent shell. 
Figures 67, 67 a, two views of the animal, with the shell ; 67 4, the 
mucus-pore enlarged. 
NanIna iRRADIATA (Gould). 
Testa conico-globosa, tenuis, imperforata, albida, supra purpureo radia- 
tim tessellata, linets incrementi acutis confertim striata, subtus rotun- 
data: spira anfractibus sex convexis, ultimo sub-angulato : apertura 
transversa, lunata ; labro acuto, ad columellam incurvato, viz reflexo. 
Hehx (Nanina) trradiata, Goutp ; Proceed. Bost. Soc. Nat. Hist., 
i. 178. Nov. 1846. Expedition Shells, 25. Prremrer; Monog. 
Helic. Viv. i. 29. 
Animat pale pea-green, with ochreous reflections on the neck. Its 
shape is nearly uniform throughout, truncated obliquely at extremity, 
where there is a mucus-pore. Tentacles very long, and of inferior 
size ; lateral line very distinct along the middle of the sides, rising 
retrally ; above this, finely granulated; beneath thickly fringed with 
radiating lines. 
SHELL small, globose-conic, thin, imperforate, white, checkered 
above with radiating purplish-brown or chestnut stripes. Whorls six, 
rather convex, covered with crowded, minute, sharp lines of growth, 
and with the periphery slightly angular. Suture well marked. 
Aperture transverse, lunate, the columellar portion continuing its 
circular curve as it joins the penult whorl; lip simple and sharp, a 
little flattened on the left side. 
Diameter one-fourth of an inch ; axis three-eighths of an inch. 
Found by Mr. Brackenridge at the Bay of Islands, New Zealand. 
A singularly coloured shell, in shape more like H. cubensis, Pfeiffer, 
