53 



Animal, bluoish black round the base of the foot and head ; 

 muzzle and mantle, pale creamy white ; muscles of jaw, red ; 

 jaws, cartilaginous, semi-lunar, pellucid, swollen ; head, 

 purple above, livi J below ; tentacles, short, swollen ; eyes, 

 small, and at outer base ; mouth, with cirrhi, and open- 

 ing lengthwise ; gill plume, fine pointed and long, white ; 

 odontophore transparent, divided into small squares, each 

 sustaining two pairs of broadly round edged minute curved 

 teeth, opaque, pale, and with a fine dark edge; one pair close 

 together in the centre of the odontophore, the other pair wide 

 apart and with a fine lateral cusp on the outer side. 



AcMiEA MARJiORATA (milti. Vide Proceed. B.S. Tasm., 1875., 

 Diagnosis auct.) Shell small, ribbed irregularly elliptic, de- 

 pressed, generally much corroded, dirty yellowish brown, often 

 stained, and mis-shapen ; apex when not corroded somewhat 

 elevated and anterior, but more often quite obliterated ; ribs, 

 from eight to ten, rugged and often much distorted with lines 

 of growth, projecting conspicuously beyond the periphery ; 

 interior edge undulating, deep fuscous brown, lines of ribs 

 concave and white, giving the interior a rayed appearance ; 

 spatula black, irregularly margined, with opaque white, 

 more or less black spotted. Dimensions of five rather large 

 specimens, Long. 19, Lat. 17, alt, 5 ; Long. 20, Lat. 16, alt. 7 ; 

 Lon. 19, Lat. 12, alt. 5 ; Long. 18, Lat. 16, alt. 9 ; Long. 17, 

 Lat. 17, alt. 8. The variation in the relative dimensions will 

 show the extreme variation in shape to which the species is 

 subject. 



The mantle of the animal is of pale transparent neutral tint, 

 showing veins very clearly and sufficiently translucent to show 

 the pattern of the shell underneath. The edge of the foot is 

 yellow with the upper part and base darker neutral tint; upper 

 part of head lemon yellow, with fine, somewhat long, and trans- 

 lucent tentacles, with eyes on external base on a swollen 

 tubercle ; outer lips with coarse cirrhi ; inner lips opening 

 perpendicularly and displaying a lanceolate unarmed tongue, 

 with a raehis (odontophore) at its base ; gill plume small, 

 translucent, and seldom exserted beyond the head. The 

 animal is found above low water mark in crevices, etc., at 

 Southport, and generally throughout Tasmania ; odontophore 

 about one and a half length of shell ; teeth in pairs, and 

 recurved, broad, and rounded intoa semicircular edge, first pair 

 largest and somewhat oblique, and with a small cusp at each 

 side on the outer edge ; central pair, small, narrow and close 

 together ; roots curved. The larger pairs have a curve in 

 both directions, and not unlike the upper part of a lady's 

 tortoiseshell comb. 



The species that I am about to notice are included under 

 quite another family from Patellidae. At present Molluscau 



