ACT^EONID^E. 229 



SUPPLEMENT TO MONOGRAPHS OF TECTIBRANCHIATA CEPHAL- 



ASPIDEA. 



Family ACTJEONID^E (Vol. XV, p. 135). 



Genus ACTION (p. 147). 



A. EXILIS Jeffreys (Vol. xv, p. 156) has also been dredged off 

 Ireland to the southeast of Rockall, in 1215 fins. (Norman, Ann. 

 Mag. N. H. [6], vi, 1890, p. 63). Another figure is given in Proc. 

 Mai. Soc. i, pi. 16, f. 8. 



Cossmann refers this species to Crenilabium, asubgenus of Actceon- 

 idea. The latter group is in reality a synonym of Rictaxis Dall, 

 1871 (not 1891 as Cossmaun states). The references to Cretiila- 

 bium are as follows : 



Crenilabium COSSM., Catal. Illustr. des Coq. Foss. de 1'eocene des 

 Environs de Paris, in Annales de la Soc. Roy. Malac. de Belgique, 

 xxiv, 1889, p. 302 (type A. aciculatus Cossm.) ; Ess. Pal. Com p., i, 

 p. 53. Lissactceon MONTEROSATO, II Naturalista Siciliano, p. 188, 

 1890 (type A. exilis Jeffr.). 



A. BROWNI Jordan. PL 61, fig. 60. 



Shell spindle-shaped, opaque and somewhat glossy. Sculpture 

 numerous spiral incised lines, those on the base being much stronger 

 and visible to a sharp eye without the aid of a lens ; the spaces be- 

 tween these lines vary in width. Color ivory white; spire moder- 

 ately elongated and gradually tapering to the apex. Whorls 5, but 

 possibly 6, the apex being broken off, moderately rounded, the last 

 forming about two-thirds of the shell. Suture slightly chanelled 

 when examined by looking down the spire ; mouth about two-thirds 

 of the length of the shell, acute angled above. Outer lip thin and 

 unfortunately broken. Inner lip inconspicuous; pillar short and 

 flexuous. Fold or plait winding obliquely down the pillar, and not 

 tooth-like as in A. tornatilis. Operculum ear-shaped and marked 

 with transverse lines of growth. Long. 8*12, diam. 3*15 mill. (Jor- 

 dan). 



" Warm area, Faroe Channel," about 80-90 miles N. of the Butt 

 of Lewis, 570 fms. 



Actceon browni JORDAN, Proc. Malac. Soc. i, p. 267, pi. 16, f. 7. 

 One specimen collected. 



