166 Transactions. — Zoology. 



CANtHAEiDus TENEBRosus (?). I am verj doubtful as to the correct 

 determiuation of this shell, for although it is bluish black, transversely 

 sulcated, the sulci whitish, and coarser than those of C. huttonii, in shape it 

 is shortly conical, and as broad or broader than high, and when young is 

 perforated. The largest specimen that I have seen measured '3 inch 

 both in height and in breadth, but usually the height is -2, and the breadth 

 •23. It is not uncommon on seaweed in Lyttelton Harbour. Perhaps it 

 may be a variety of C. 2nipillus. 



Animal. Foot blue black, concentrically speckled or striped with 

 yellowish white. Proboscis blue black, narrowly bordered with dusky white 

 or yellow. Eye peduncles short. Tentacles purple, with a dark line down the 

 middle. Filaments purplish, three on each side. 



Dentition like C. kuttonii, but the central tooth has the median lobe 

 behind well developed. (PI. VII., fig. l.) 



DoEis wELLiNGTONENSis. Dentition. The radula is folded longitudinally 

 along the central line, the two halves being in apposition, and has about 

 thirty-four transverse rows of teeth. The teeth are about 65-1-65. The 

 central tooth is small and blunt ; the laterals have a long, narrow, oblique 

 base, turned over and bearing a narrow, acute, cutting point. They 

 increase in size from the centre to about the thirtieth longitudinal row, and 

 then decrease outwards. The cutting pomts are much worn in the anterior 

 rows. (Plate VI., fig. a.) 



^oLis PLicATA, sp. nov. (PI. VI., fig. I.) Head, neck, and body 

 white ; branchiae in close transverse rows on the back, dark brown, each 

 margined with white. Body not tapering behind. Margin of foot fringed 

 and crumpled, except near the head, where it is simple ; it is divided in 

 front, but not produced. On the side, below the branchiae, several rows of 

 small white papillae (?) arranged in festoons. Tentacles distant, subulate, 

 tapering, projecting outward, white. No eyes. Oral tentacles shorter, 

 thickened at the base, tapering, projecting laterally, and curved backward; 

 white. Length about three quarters of an inch. 



Found on the roots of D'UrvillcEa iitilis, cast upon the beach at Sumner. 



Dentition, 0-1-0. About 17 or 18 teeth on the radula, in a single 

 series. Each tooth crescent shaped, with a pointed tooth in the centre, 

 and six smaller denticles on each side (PI. VI., fig. f. a.) Jaws two, the 

 apices acute and denticulated, the posterior portion flattened. (PI. VI., 

 fig. F. b.) 



MojAS coKFEi. The teeth of this species resemble those of jE. plicata, 

 they have a central tooth with six denticles on each side. There are 18 or 

 19 on the radula. Jaws two, the apices denticulated ; the posterior portion 

 reflexed. (PI. VI., fig. e. a and b.) This species should I think be put into 



