Oliver. — Mollusca of the Kermadec Islands. 557 



Amphineura. 



Lepidopleurus subtropicalis Iredale. 



Lepidopleurus (Terenochiton) subtropicalis Iredale, Pro. Mai. Soc, xi, 



28, 1914. 

 Kecorded, Iredale, I.e. 



Habitat. — Living on the underside of embedded dirty stones near low- 

 water mark, Coral Bay, Sunday Island. 



Parachiton mestayerae Iredale. 



Parachiton mestayerae Iredale, Pro. Mai. Soc, xi, 27, 1914. 

 Recorded, Iredale, I.e. 



Habitat. — Dredged on gravelly bottom near Sunday Island in 27 m. and 

 45 m. (Iredale) ; also living on underside of stones near low-water mark, 

 Coral Bay. 



Ischnochiton kermadecensis Iredale. 



Isclmochiton kermadecensis Iredale, Pro. Mai. Soc, xi, 35, 1914. 

 Recorded, Iredale, I.e. 

 This species is closely allied to /. intermedins Hedley and Hull, from 

 Norfolk Island. Iredale also describes a colour-variety under the name 

 exquisita. 



Habitat. — Abundant living; on the underside of clean smooth stones near 

 low- water mark, Sunday Island and Meyer Island. 



Eudoxochiton perplexus Iredale. 



Eudoxochiton perplexus Iredale, Pro. Mai. Soc, xi, 29, 1914. 

 Recorded, Iredale, I.e. 



This species varies considerably in the angle of divergence of the median 

 valves, and also slightly in the number of slits in the posterior valves. 

 Using these characters, Iredale separated the Kermadec shells into two 

 species ; but as intermediate forms are the rule, and no satisfactory line can 

 be drawn between the extreme forms, I consider the proper course is to 

 treat them as one species. Utilizing the above characters, it is perhaps 

 convenient to refer to Iredale's groups as varieties, which may be thus 

 defined. 



Var. typicn. — Shell elevated, anterior and posterior valves each with 

 about 23 slits. 



Var. imitator (Iredale). — Shell depressed, anterior valve with more than 

 25 slits, posterior valve with about 22 slits. 



Habitat. — Living on rocks about low-tide mark, Sunday and Meyer 

 Islands. During the winter strong westerly winds caused the shifting of 

 a good deal of sand on the north side of Sunday Island ; this partly buried 

 the lower portions of a rocky coast, and drove numbers of marine animals, 

 including Eudoxochiton inshore, so that as many as sixteen of this species 

 were captured in a single day. 



Plaxiphora mixta Iredale. 



Plaxiphora (Maorichiton) mixta Iredale, Pro. Mai. Soc, xi, 33, 1914. 

 Recorded, Iredale, I.e. 

 Habitat. — Living on rocks between tide-marks (fairly common), Sunday. 

 Meyer, and Macauley Islands, and French Rock. 



