666 DR. GWYN JEFFREYS ON THE MOLLUSCA OF THE [Nov. 14, 
colour white: mouth circular, not oblique or sloping: dase notched 
oneach side. L. 071, B. 0°35. 
‘Porcupine’ Exp. 1870: Atl. St. 16. A single specimen. 
Y 9. Capuxus cissus’, Jeffreys. (Plate XLIX. fig. 10.) 
SHE 1 barrel-shaped, gibbous in the middle, whence there is an 
abrupt slope towards each end; these are equal in breadth: it is 
rather solid, glossy, and semitransparent: sculpture none: colour 
white: mouth obliquely truncated: base slightly notched, but not 
quite perfect. L. 0-1, B. 0°05. 
‘Porcupine’ Exp. 1870, Atl. St. 13; a single specimen. 
Distribution. Bay of Biscay (‘ Travailleur’ Exp., 1880); one 
specimen. 
Allied to C. ovulum of Philippi, but much smaller and not so oval, 
and the ends are equal in size. The last named species was dredged 
by Admiral Acton in the Bay of Naples, and by Dr. Fischer in the 
Bay of Biscay during the ‘ Travailleur ’ Expedition of 1880. 
Class GASTROPODA. 
Family I. Curronipa. 
The controversial contributions to the vexed history of this con- 
fessedly abnormal group in a taxonomical and anatomical point of 
view seem to be endless. In the ‘ Proceedings of the Royal Society’ 
for December 1880 will be found a careful and elaborate paper by 
Mr. Adam Sedgwick on the kidney of Chiton, showing that Mid- 
dendorff was right and Schiff and von Ihering were wrong as to the 
existence and position of that organ. 
Genus Cu1Ton. 
A. Acanthochites, Leach. 
Girdle covered with spines, and having also tufts of bristles. 
Vv 1. Carron rascicuxaris, Liuné. 
C. fascicularis, L. S. N. p. 1106: B. C. iii. p. 211, pl. v. f. 2; 
v. p. 197, pl. lv. f. 3. 
‘Porcupine ’ Exp. 1869: St. Lough Foyle. 1870: Atl. Gibraltar 
B 
Distribution. Norway to the Aigean and Adriatic (but southern 
habitats unreliable); Mogador (McAndrew) ; 0-145 fms. 
Fossil. Pliocene: Coralline Crag and S. Italy. Post-tertiary : 
Selsea. 
Perhaps the C. fascicularis of Linné may have been C. discrepans. 
In Philippi’s collection at Berlin are specimens of both species named 
C. fascicularis. Ifthe Linnean name has been misapplied, Pennant’s 
name crinitus ought to be substituted for it. Leach called the 
present species Acanthochetes vulgaris. 
Dr. Edward Brandt has examined and compared the nervous 
system of Chiton fascicularis and Patella vulgata. He considers 
1 Gibbous. 
