Athoracophorus.] GASTROPODA. 803 



Type in the Otago Museum, Dunedin. 



Hob. North Island : Heretaunga ; Forty-mile Bush (H. S.). 

 South Island : Pelorus Valley ; Nelson ; Greymouth ; Little River ; 

 Riccarton Bush ; Governor's Bay ; Hooker Valley (H. S.) ; Ashbur- 

 ton (W. W. Smith) ; Invercargill. Chatham Islands (H. Travers). 

 Remarks. I have not seen specimens from the Chatham Islands. 



7. Athoracophorus Schauinslandi, Plate, 1897. Plate 31, fig. 10. 



Janella Schauinslandi, Plate, Sitz. Ber. Naturf. Freuncle, Berlin, 1897, 141 ; 

 Zool. Jahrb., Anat., xi, 1898, 193-97, 268, 269, pi. 12, f. 1-3 : Anatomy, 

 207-11, 216-21, 225-31. 235-61, 263; pi. 12, f. 14-17 ; pi. 13, f. 19-23; 

 pi. 14, f. 24-28 ; pi. 15, f. 34-37 ; pi. 16, f. 41-46, 52-54 ; pi. 17, f. 6-60. 

 A. Sch luinslindi, Plate: Suter, P. Mai. S., viii, 325; ix, (i. 



Animal in general habitus very much like A. papillatus, but the 

 lateral grooves are less numerous. Colour light yellowish-brown with 

 numerous dark-brown round spots on the back ; anterior part of 

 median groove blackish ; sole yellowish-white. Surface of nolum with 

 fine granules, and in the lateral fields there are 2 to 4 large papillae, 

 arranged into longitudinal rows. Median groove deep, leginning at 

 the anterior part of the head-shield, with about 15 lateral grooves on 

 each side, often bifurcating, 7 of them being post-pallial. Mantle-area 

 triangular, limited on all sides by prominent grooves, its length twice 

 that of the width, the respiratory orifice subcentral, renal opening in 

 the median groove and inner angle of the mantle-area, the posterior 

 end of which is at the middle of the length of the animal. Anal opening 

 on the right side, about 2mm. above the perinotum and below the 

 renal orifice, Avith a preanal groove. Genital orifice outside the right 

 tentacle. Hyponolum distinct. Rudimentary shell contained in 60-80 

 shell-vesicles, the grains of very variable size, some large and angular. 



Length, 44 mm. ; breadth, llmm. Length of head-shield, 8mm. 

 Mantle-area, 3 mm. by 6 mm. Anus 2 mm. from perinotum, and 

 3-| mm. from the right angle of the mantle-area ; 6 mm. from the 

 median groove. 



Jaiv elasmognathic. 



Radula with numerous teeth, the central tooth with 3 .denticles, 

 lateral teeth with 5 to 8 denticles, the innermost larger than the others. 



Reproductive Organs. The albumen-gland is large, smooth, com- 

 pact ; there is no spermoviduct and no prostate, but 2 accessory 

 glands, a granular bulbose gland and a convolute glomerate gland. 

 The receptaculum seminis is distal, globular, with a short duct. The 

 male organ is usually convolute, the anterior half somewhat inflated 

 and armed with papillae, the posterior half more slender, without 

 papillae ; at the end of the latter part the retractor muscle is fixed 

 and the vas deferens enters. 



Type in the Museum fiir Naturkunde, Bremen. 



Hob. Stephen Island, Cook Strait (Professor Schauinsland). 



26* 



