1 28 Transactions. — Zoology. 



Acmjea flammea, Quoy aud Gahnard. PI. XV., fig. n. 



Animal with the margin of the mantle fringed. Dentition. — Teeth much 

 like those of A. pileopsis, hut they are weak in the middle and often break 

 when detached, so as to divide the anterior from the posterior recurved 

 portion, thus approaching Patella, where the anterior and posterior portions 

 are always separated. Basal plates subrectangular, the length about twice 

 the breadth, and divided by a longitudinal line into two portions. No 

 accessory teeth. 



The specimen figured was collected at Lyttelton. 



Patella magellanica, Martyn (?). PI. XVI., fig. a. 



Animal. — In this species, and in all the other of our Patelliclce that I have 

 examined, the gills do not extend beyond the head, and the mouth is entire 

 below, thus putting them into the genus Nacella, but the shell in all is 

 thick and all live on rocks. In all the mantle is fringed. Dentition. — 

 Inner teeth simple, pointed ; outer bidentate on the outer side : central 

 plate cuneate, divided down the centre ; marginal plates rhomboidal, large. 



The specimen figured was collected at the Auckland Islands by Mr. E. 

 Jennings, and sent me by Prof. T. J. Parker. 



Patella denticulata, Martyn (= P. luctuosa, Gould, PI. XVI., fig. b). 



Dentition. — Inner teeth simple, pointed, set near together ; outer teeth 

 with two denticles on the outer side, the lower often semi-detached ; central 

 plate lenticular, divided down the middle ; marginal plates distant with a 

 hooked anterior and jagged posterior end, a small detached plate a little 

 above the hooked termination of the larger plate. 



The specimen figured was collected at Dunedin. 



Patella illuminata, Gould. PL XVI., fig. c. 



Dentition. — Inner teeth with a single denticulation on the outer side ; 

 outer teeth with two denticulations on the inner and two on the outer side, 

 the lower outer denticle detached ; central plate lenticular ; marginal plates 

 linear forming a double series on each side. 



The specimen figured was collected at Macquarie Island by Professor 

 Scott, and sent me by Prof. T. J. Parker. 



Patella olivacea, Hutton. PI. XVI., fig. d. 



Dentition. — Inner teeth simple, pointed ; outer with two denticulations 

 on the outer edge, the lower almost detached ; central plate linear, or 

 slightly cuneate, divided longitudinally into two, each half with a bright 

 oval spot at the anterior end ; marginal plates similar to those of P. den- 

 ticulata, but the intermediate plate is much larger, and occupies most of 

 the space between the hooked plates. 



The specimen figured was collected at Dunedin ; in the figure the inner 

 teeth are shown too widely separated. 



