668 DR. GWYN JEFFREYS ON THE MOLLUSCA OF THE [Nov. 14, 
Distribution. C. Croisic (Cailliaud), C. Breton (de Folin), Spain 
(McAndrew and others), Mediterranean and Adriatic (Poli and 
others) to Aigean (Forbes) ; 5-20 fms. 
¥ 5. Curron cinereus, Linné. 
C. cinereus, L. 8. N. p. 1107: B.C. iii. p. 218; v. p. 198, pl. lvi. 
£2. 
‘ Lightning’ Exp. St. 4, 5. 
‘Porcupine’ Exp. 1869: St. 2, Lough Foyle. 1870: Atl. 36 
(plate). 
Distribution. Greenland (Fabricius) ?, Iceland, Faroe I., Finmark 
to Vigo Bay; 1-150 fms. Apparently not Mediterranean nor 
Adriatic. 
Fossil. Pliocene: Sicily (Monéerosato and Tiberi). Post-tertiary : 
Norway and Scotland ; 0-80 ft. 
One of the synonyms is C. asellus of Spengler. 
6. Carron arcricus, G. O. Sars. 
Lepidopleurus urcticus, G. O. Sars, Moll. reg. arct. Norv. p. 112, 
t. 7. f. 7, a-h. 
‘ Lightning’ Exp. St. 3, 4. 
Distribution. Spitzbergen, Greenland as OC. cinereus (M. Sars) 
probably, Finmark and Vadsé (G. O. Sars); 20-100 fms. 
Fossil. Post-tertiary : Norway, as O. cinereus (M. Sars) probably. 
This differs from the white variety of C. cinereus in its com- 
paratively greater length and more raised or arched form, in the less 
distinct or regular catenation of the granules which cover the sur- 
face, and in the prominence of the lateral areas. 
7. CHITON ALVEOLUS, M. Sars. 
C. alveolus (Sars MS.), Lovén, Ind. Moll. lit. Scand. oce. hab. 
p- 27. 
Lepidopleurus alveolus, G. O. Sars, Moll. reg. arct. Norv. p. 110, 
t. 7. f. 3, a—e. 
‘Porcupine’ Exp. 1870: Atl. St. 1. 
Distribution. Norway, Bay of Biscay (‘Travailleur’ Exp.) ; 
120-664 fms. 
The late Professor Sars, in his remarks on the occurrence of 
animal life in the depths of the sea, 1868, referred this species of his 
to C. cancellatus; but C. alveolus is larger and longer or more 
oblong, and it has a different sculpture. 
8. CHITON RARINOTA’, Jeffreys. (Plate L. fig. 1.) 
SHELL oblong-oval, arched, rather thin and glossy : plates broader 
in the middle than at the sides; lateral areas indistinct: seulpture 
consisting of white tubercles, which are few in number and irregularly 
scattered ; these are round in the middle of the shell, but become 
' Having few marks. 
