ADDITIONS AND EMENDATIONS. 



Laoma (Phrixgnathus) Celia, Hutton, n. subsp. levis. 



This subspecies is slightly smaller than the species, of a higher 

 polish, the brown colour-markings more distinct, forming zigzag lines, 

 and always extending over the base ; the microscopic spiral lirae are 

 absent or exceedingly faint ; the spire is more depressed, equalling in 

 height that of the aperture, and the perforation is slightly narrower. 



Diameter, 3-5 mm. ; height, 2 mm. 



Type in my collection. 



Hob. Pipiriki. Wanganui River (Mrs. G. B. Longstaff). 



Laoma (Phrixgnathus) Celia, Hutton, n. subsp. alboviridis. 



The microscopic spiral lines are present and very distinct, as in 

 the species, but there is an almost total absence of all colour-markings, 

 the whole shell having a greenish-white colour, with sometimes a 

 few indistinct light-brown radiate streaks on the earlier whorls ; the 

 epidermis is not shining, and the aperture and spire are of about the 

 same height. 



Diameter, 3-3 mm. ; height, 2-2 mm. 



Type in my collection. 



Hab. Mount Alfred, Otago (Mrs. G. B. Longstaff). 



Plaxiphora superba, Pilsbry. Plate 32, fig. 11. 

 Plaxiphora obtecta, Pilsbry. Plate 32, fig. 10. 

 Spongiochiton productus, Pilsbry. Plate 32, fig. 9. 



The figures of these three species are reproduced from photos 

 taken from the types in the British Museum, and kindly sent by Mr. 

 Edgar A. Smith/ I.S.O. 



Dr. Joh. Thiele published in " Zoologica," xx, Heft 56, 1909-10, 

 a revision of the system of the Chitons, and from the pen of T. 

 Iredale appeared three papers in the P. Mai. S., ix, pts. 1-3, 1910. 

 dealing with the marine Mollusca from the Kermadecs and the 

 Australasian Polyplacophora. From these publications the following 

 notes are taken : 



Ischnochiton Parked, Suter, 1897. 



Iredale (I.e., 91) identifies with this species Tonicia Gryei, Filhol, 

 1880 ; Lepidopleurus melanterus, Rochebrune, 1883 ; Ischnochiton 

 fulvus, Suter, 1905, and proposes Filhol's name for the species. 

 Neither Filhol nor Rochebrune have given figures of their species, so 

 my name may stand. Iredale remarks, " Thiele, having examined 



