78 COLLECTIONS PKOM MELANESIA.. 



account of its more central and differently shaped foramen, which is 

 larger, wider, and broadly ovate. The more median position of it 

 considerably alters the contour of the shell. 



106. Fissurella quadriradiata. 



Reeve, Conch, lean. \'vs. UK 



Huh. Port Mulle. Queensland (Copping er) ; Island of Negros, 

 Philippines ( ( 'uming). 



The single specimen from Port Molle is rather more elevated than 

 the t j pe from the Philippines, but a second example from the latter 

 locality has an equally high elevation. The Australian shell is 

 18 miilim. loDg, 1 \\ broad, and 10| in height. The type has the 

 Bame Length and width as the preceding specimen, but is only 8 

 miilim. high. 



F. ticaonica, lleeve, is rather more elongate than this species, has 

 finer radiating costae, the foramen is rather more anterior and 

 circumscribed with the exception of the posterior end by a narrow 

 dark olive line, which is more or less visible on the exterior. F. 

 quadriradiata is not always four-rayed, but may be altogether white 

 or have the costoe, principally the larger ones, spotted with olive 

 and flesh tints. However, judging from the few specimens under 

 examination, where rays are present, they appear to be of the 

 number and in the positions depicted by Reeve. 



107. Chiton jugosus. 



Gould, Proe. Boat. Soc. Nat. Hist. 1846, vol. ii. p. 142; Wilkes'a 

 Explor.Exped. p. 317, fig. 430 ; Otia, p. 3,& p. 242 (0. Lophyrus j.). 

 Chiton concentricus, Reeve, 1847, Conch. Icon. pi. 16. fig. 95. 



Hab. Xew South Wales (GJd.); New Zealand (Reeve); Port 

 Jackson (Coppinger, Angas, and Rev. R. L. King); Newcastle (Dr. 

 Bieffenbach in Brit. Mus.). 



Confirmation of the New-Zealand locality of this species is still 

 wanting. 



108. Chiton (Isehnochiton) curtisianus. (Plate VI. fig. D.) 



Shell oval, flatfish, of a dirty dark greyish colour, having a con- 

 spicuous black broadish line from end to end down the middle of the 

 back, with a pale one on each side of it, and with the mantle patched 

 alternately light and dark, irregularly granulated throughout. 

 Valves are! ied, not carinate at the vertex, with very indistinct 

 lateral areas, exhibiting strong concentric lines of growth, especially 

 conspicuous at the sides and anterior margins. Front plate well 

 curved anteriorly, the posterior margin being broadly sinuated. 

 Second plate longer than the other intermediate valves, slightly 

 incurved on each Bide, the central outcurved point in front, rather 

 peaked in the middle of the hinder edge. The third, fourth, fifth, 

 sixth, and seventh valves are very short in comparison with their 

 width in proportion as 1 is to 3. The jugal sinus is large and 



