b niOCEEDINGS OF THE MALACOLOGICAL SOCIETY. 



combined with the general form and size, probably lead Hutton to 

 consider the genus a New Zealand one. I should, however, unless 

 the anatomical characters have been proved to be the same, hesitate 

 to do so, and the extended range of this genus must be received with 

 great doubt cousidering the enormous distance between the two 

 islands. 



Helix %cbra=phh(jopliora is, as I have mentioned before, placed in 

 Faryphanta by Albers and is retained in that genus by Hutton in 

 his paper,* and desciibed as having a mucous gland. In his revision 

 of the Land Mollusca of New Zealand,- it is placed in Amphidoxa. 

 If the character of the mucous gland be correctly given it must 

 be placed in some other genus, for no other species included under 

 Amphidoxa is described as possessing this character. The jaw 

 moreover is smooth (see Hutton's figure on PI, xi. fig. P.), and 

 in this respect and in the drawing of the radula (PI. ix. fig. Z.) 

 the dentition is nearer the type of the Indo -Malay species of the 

 Zonitida3 than any of the other lingual ribbons, figured by Hutton, 

 of New Zealand land shells. 



Description. — Animal when alive apparently very dark indigo grey; 

 {Bushy lis described as "dark blue black"). There is no sign of a 

 mucous pore. The foot below is pale grey and is much wrinkled into 

 folds directed centrally to where the powerful retractor muscles have 

 their attachment (Fig. 2 and 3), it is produced, and narrows rapidly, in 

 front, broad and rounded behind, and it evidently can be very widely 

 and laterally extended in life, so as to be oval in form, which is still 

 its character in the spirit specimen. There is no central area. The 

 foot is striated above (Pig. 4) by fine equidistant grooves, united by 

 finer cross lines: the first terminate in a narrow pallial groove running 

 parallel to the edge of the foot. 



There are no mantle lobes, though the mantle (Pig. 1 ) is no doubt 

 recurved over the edge of the peristome in life. The neck lappets or 

 lobes arc small, the right simple, the left in two lobes, one next 

 the respiratory orifice, the other tongue shaped on the posterior side, 

 and in this respect it resembles Helix {Rliysota), Brookei, fi'om Borneo. 

 The buccal mass (Pigs. 5 and 7) is very large, about 32 mm. long in its 

 contracted state, it is cylindrical bent round downwards and again 

 forwards at the posterior end, broad side muscles keeping it in this 

 position ; the muscular attachments are very strong. The sides of the 

 buccal mass have a thin, somewhat horny covering, through which 

 in front the radula can be detected, the anterior side muscles pass 

 through this outer covering and are attached to the lingual cartilage 

 just at the point where the radula first emerges from the central 

 sheath in which it is developed. The odontophore, when the mouth 

 is cut away, shews the radula conti-acted into an oval U-like form 

 (Pig. 8) and turned back from the inside lapping over to the outside 

 of the long lingual cartilages, which further back enclose the muscular 

 sheath (m.s. Pig. 9) in which the radula takes its rise. The odonto- 



1 "Notes on New Zealand Land Shells." Trans. New Zealand Inst. xvi. p. 170. 



2 t.c. p. 198. 



