512 Transactions. 



blotches of grey or radiating stripes of yellowish. Interior iridescent slaty 

 blue, spatula brown with white centre. Dark colour-markings (seen on 

 holding shell to light) in narrow radiating streaks; sometimes broader bands 

 are faintly indicated. 



Length, 25-2 mm. Breadth, 214 mm. Height, 7 - mm. 

 24-2 mm. ,, 20-2 mm. ,, 5-8 mm. 



27-8 mm. „ 22-7 mm. „ 8-8 mm. 



This is a most variable species, to which I assign a multitude of de- 

 pressed shells which I cannot satisfactorily place under any other species. 

 I would venture to say that its variants afford ample material for the 

 production of all the species of Cellana in the Kermadecs. 



Habitat. — Abundant living on rocks between tide-marks, Sunday Island ; 

 most frequent about half-tide mark. 



Subsp. prolixus n. subsp. Figs. 1 and la. 



Description oj Type Specimen. — Shell depressed, height 0-29 of length, 

 broadly elliptical, slightly narrowed in front. Apex at the anterior fourth. 

 Anterior slope very slightly concave ; posterior slope convex above, the 

 lower half straight. Margin crenulate. Sculpture : The apical portion is 

 corroded and sharply marked off from the remainder of the shell, which 

 is ornamented by numerous (over 100) fine radiating riblets. These are 

 slightly irregular in size, tending to groups of threes, the central one of 

 which is slightly larger than the others. All are crossed by concentric 

 growth-lines, giving a fine beaded appearance. Colour : The apical por- 

 tion greyish-white with a row of brown spots at the margin. Basal portion 

 pale lemon-yellow, darker above, with numerous radiating narrow brown 

 lines. Interior iridescent lemon-yellow with radiating brown lines, spatula 

 brown with a white centre. 



Length, 32 mm. Breadth, 28-2 mm. Height, 9-2 mm. 



Variations from Type. — In its typical state this variety is very distinct. 

 On the ground-colour and interior becoming darker it passes over into the 

 typical form. The apex may be quite or not at all corroded. A corroded 

 apex surrounded by a whitish ring showing radiating brown bands is a 

 characteristic feature of this subspecies, and appears frequently in young 

 shells. 



Length. 314 mm. Breadth, 264 mm. Height. 74 mm. 



27 mm. ,, 22-5 mm. „ 7-2 mm. 



,, 21-5 mm. ,, 18"0 mm. ,, 5-8 mm. 



This subspecies I at first supposed to be the true craticulatus, and Iredale 

 also (Pro. Mai. Soc, ix, 72) has confused both this form and C. scopulinvs 

 with the type of craticulatus. By submitting specimens to Mr. Suter I 

 finally had the matter cleared up. 



Habitat. — Abundant living on rocks between tide-marks, Sunday Island. 



Cellana hedleyi n. sp. Figs. 2 and 2a. 



Description of Type Specimen. — Shell depressed, height 0-24 of length, 

 oval, narrowed in front. Apex about one-fourth the length from the 

 anterior end. Anterior slope nearly straight, posterior slope convex. 

 Margin irregularly crenulate. Sculpture : There are 22 broad leading 

 ridges, each with 3 to 5 ribs nearly equal in size and regularly beaded. 

 Colour : Above dark yellowish-green with 9 dark brownish-green bands on 

 alternate leading ridges, 4 being directed forwards and 5 backwards from 



