74 



furrow. Front of the head with a moderately convex marginal rim, 

 almost in contact with the glabella or separated therefrom by a narrow 

 space. The eye-lobe starts from a point close to the side of the glabslla 

 and just opposite or a little behind the short frontal furrow, and runs with 

 a gently sigmoid curve (at first convex outwardly, and then concave) 

 "backwards and outwards to the posterior marginal furrow, which it 

 reaches at a distance from the sides of the glabella, about equal to the 

 length of the neck segment. The facial suture leaves the side of the 

 glabella a little in front of the anterior furrow, and runs outwards, nearly 

 at a right angle, but with a gentle convex curve, to the margin. 



The surface is covered with fine rippled striae. These on the marginal 

 rim are irregularly parallel with the margin ; on the glabella they curve 

 around the front, but further back, and on the neck segment they have a 

 rudely longitudinal direction, curving outwards in crossing over the 

 glabellar lobes. 



Length of the head of the largest specimen examined, six lines ; 

 length of the glabella, including neck segment, five lines ; width of 

 glabella at the neck segment, three lines, at the front pair of furrows, 

 three and a half lines ; width of the posterior margin of the fixed cheek, 

 three lines ; length of the eye lobe, four lines. 



When compared with the species figured by Salter and Hicks the 

 following diflference becomes apparent : — A. Henrici, Salter, has the eye 

 lobes with a gently uniform curve outwards. In A. Salteri, Hicks, the 

 eye lobes are also convex and the glabella proportionally longer, while the 

 neck furrow "is the only one continued across." (Hicks.) A, impar^ 

 Hicks, has the flexuous eye lobes of our species, but the marginal rim' is 

 more decidedly in contact with the front of the glabella, while the two 

 median pairs of furrows extend further inwards. 



Occurs at Chapel Arm, Trinity Bay. 



ParadoxIdes texellus. (N. sp.) 



Figr. 43 Paradoxides tenellus. 

 Fig. 43. 



Description. — Glabella clavate, convex, most elevated at the anterior 

 third of the length, front and sides in the anterior half, rounded, becoming 

 sub-parallel in the posterior half. Neck segment strongly elevated in the 



