238 



r/,/Vo/, m/vn.r JiKEvi-:. Conch. Icon., t. 6, f. 31 (Feb., 1847). /,<>,- 

 it-'t i-ulrn.c (Rve.) IlAnimN, 'Challenger' Polyplac., p. 31. Chiton 

 cimol!".< Hi: i:\ i :. Conch. Icon., t. 21, f. 141 (May, 1847). L 

 rhnoli'i \\. & A. AD., Ann. Mag. N. H. (2) ix, p. 355. ANGAS, P. 

 /. S. 1SG7, p. 224; 1871, p. 97. Aiilacochiton volvox SIIUTTL., Bern. 

 Mittheil. 1853, p. 68.? Chiton nulls HUTTON (see below.) 



The differences between L. volvox and L. cimolia are easily effaced 

 when a good series is examined. The yoilng show great variation in 

 the pustulation of the lateral areas, the pustules sometimes being 

 scattered, radiating, cords obsolete. The dorsal ridge generally 

 has a central fine carina with a long narrow smooth triangle on 

 each side, but this varies also. The second valve has a rather large 

 median patch of scattered or diverging series of pustules. The color- 

 ing varies a good deal in the series before me. 



' I am disposed to consider Hutton's Chiton rudis a synonym of 

 this species, but my opinion is founded upon a study of the original 

 description only, which is as follows : 



Chiton rudis Hutton. Oblong; margin with minute scales; 

 valves elevated, flattened on the sides, not keeled ; apex of anterior 

 valve recurved, with its posterior margin slightly convex at the sides 

 and deeply concave in the center ; posterior margins of intermediate 

 valves straight ; posterior valve rather small ; apex posterior, pointed 

 and emarginate. Anterior valve and lateral areas with radiating 

 moniliform ribs ; posterior and median areas widely but rather irreg- 

 ularly, deeply longitudinally furrowed, with narrow ridges between 

 Margin gray, with broad, irregular, reddish-brown transverse 

 patches; valves grayish-brown ; interior grayish-white. Length 1*75, 

 breadth '75 inch. Founded on a specimen in the Colonial Museum, 

 locality not stated. (Hutto.i, in Trans. N. /,- Inst. iv, 1872, p. 179, 

 and Man. N. Z. Moll. 1880, p. 113.) 



Section Loricelli Pilsbry. 



Sinus in tail valve a mere wave ; jugal sinus lobed ; girdle widest 

 in front, not cleft behind. 



L. \\<. AM Adam- and Angas. PI. ~>1, figs. 9-13. 



Shell ovate, coarctate and angulate behind, pale brown, variegated 

 with green. Anterior valve concentrically striated and having 

 radiating pustulose ribs ; posterior valve narrow, transversely silicate 

 and densely longitudinally lirate; median valves subcarinated, the 



