514 Transactions. 



Above light yellowish -green. Interior iridescent pearly, the muscle- 

 impression bluish and the spatula brown with a white centre. The margin 

 is marked by numerous short reddish-brown streaks. 



Length, 30-2 mm. Breadth, 25 mm. Height, 12-8 mm. 



Variations from Type. — The young are prominently ribbed, dark green 

 above and slaty blue within. Old shells are often much corroded, especi- 

 ally above the apex, and are of a pale pearly or whitish appearance within. 



Length, 35-2 mm. Breadth, 28'0 mm. Height, 16-3 mm. 

 32-3 mm. „ 26-8 mm. „ 17-8 mm. 



27-3 mm. „ 22-3 mm. „ 12-8 mm. 



A very distinct species, which Iredale referred to H. dims Reeve. In 

 a later communication to me, however, he admits that it differs slightly 

 from that species. As Reeve's species is founded on specimens of unknown 

 locality, and apparently related to a North Atlantic form, I think the proper 

 course is to describe the Kermadec shell as new. The species of Cellana 

 are often very restricted in their distribution. 



Habitat. — Living on rocks between tide-marks, Meyer Islet. Also col- 

 lected on Sunday Island. 



Cellana scopulinus n. sp. Figs. 5 and 5«. 



Recorded, Suter, Man. N.Z. Moll., 79, 1913 (Helcioniscus antipodum). 



Description oj Type Specimen. — Shell high, height 0-38 of length, ellip- 

 tical. Apex acute, in the anterior third. Anterior slope straight, posterior 

 arched. Margin finely crenulate. Sculpture : The whole upper surface 

 with close regular radiating ribs crossed by concentric growth-lines, giving 

 a faintly beaded appearance. The ribs not quite equal in size, every third 

 one being slightly larger than the intervening two. Colour : Above yellow, 

 darkening towards the apex. Interior bright orange-yellow, paler at the 

 margin and on the muscle-impression, spatula rich brown with white centre. 

 No dark colour-markings. 



Length, 35 mm. Breadth, 29-4 mm. Height, 13-4 mm. 



Variations from Type. — Large old specimens show the whole outer sur- 

 face corroded, and sometimes bearing algae and Elminius ; interior more 

 or less whitish, except the margin, which is yellow, and may show numerous 

 short reddish-brown streaks. Some young specimens show radiating dark 

 colour-streaks. All specimens seen from Sunday Island were young, with 

 radiating dark colour-streaks. 



Measurements, French Rock specimens : — ■ 



Length, 50-0 mm. Breadth, 42-0 mm. Height, 208 mm. 

 50-6 mm. ,, 42-7 mm. „ 24-2 mm. 



Suter records this species from the Kermadecs as Helcioniscus anti- 

 podum, but, though young specimens resemble that species somewhat, full- 

 grown examples cannot be confused. Compared with C. scopulinus, C. 

 antipodum has larger ribs, and the colour-pattern, including about 11 wide 

 dark bands, is quite different. C. trameroserica of Australia is apparently 

 identical with Suter's H. antipodum of New Zealand. 



Habitat. — Common living on rocks between tide-marks, French Rock, 

 and the only species of Cellana collected there. Sunday Island ; not common. 



Schismope pacificus n. sp. Figs. 6 and 6a. 



Description of Type Specimen. — Shell turbinate, keeled, umbilicate. 

 Spire flattened. Whorls 3, the last rapidly descending. Body-whorl 



