354 Transactions. 



47. Glycymeris velutina, n. sp. Plate XXX, figs. 1 and 2. 



Pectunculus striatidaris, Lamarck, Hutton, Cat. Mar. Moll., 

 p. 80 ; Index, p. 94 (not of Lamarck). 



Shell small, rounded - triangular, solid, moderately convex, 

 finely radially ribbed, with zigzag or radial brown streaks, 

 equivalve and subequilateral. Beaks central, slightly curved 

 forwards, close together, small, and low. Anterior end with 

 the dorsal margin descending, nearly straight, slightly angled 

 on meeting the basal margin ; posterior end with the dorsal 

 margin sloping, but more convex, rounded on meeting the 

 basal margin, which is regularly convex. Lunular area slightly 

 flattened. Sculpture consisting of numerous close and fine 

 radial riblets, about 9 per mill., on the centre of the valves, 

 crossed by very fine dense concentric stripe. Epidermis brown, 

 horny, persistent near the margins, velvety, beset with nume- 

 rous fine short bristles. Colour whitish or yellowish-brown, 

 with reddish-brown zigzag or radial streaks, which, however, 

 are usually very faint in specimens from deep water. Interior 

 white, porcellaneous, faintly radially striate, sometimes stained 

 with dark-brown on the anterior lower end ; basal margin 

 very prominently crenate. Hinge-plate broad and rather high, 

 its upper margin horizontally straight, the lower margin regu- 

 larly concave ; teeth numerous, uninterrupted in the middle, 

 more or less hooked, decreasing in size distally, finely pectinated. 

 Ligament external, thick, amphidetic. Anterior adductor-scar 

 slightly smaller than the posterior. Pallial-line simple, well 

 marked. 



Length, 24 mm. ; height, 22 mm. ; diameter, 12-5 mm. Type. 



Length, 22 mm.; height, 23 mm.; diameter. 14 mm. More 

 triangular example. 



Type from Nelson, in my collection. 



A number of valves. 



Remarks. — G. striatularis, Lam., occurring in Tasmania and 

 Australia, is a much larger shell, more broadly ovate and with 

 much broader radial ribs. Our species is very nearly related 

 to G. holoserica, Reeve, of the same habitat, which, however, is 

 more elongate, has for some distance straight horizontal dorsal 

 margins, and the hinge-plate is usually lower ; the sculpture is 

 the same in the two. 



48. Philobrya meleagrina (Bernard). 



Hochstetteria meleagrina, Bern., Bull. d. Nat. du Mus., 189(5. 

 Philobrya meleagrina, Bern., Journ. de Conch., vol. xlv, 

 1897, p. 12, pi. i, fig. 3. 



One valve. 



