66 TORNATELLINID^E. 



Family TORNATELLINID^E Pilsbry. 



Tornatellinida PILS., Nautilus, xxiii, p. 122, March, 1910. 



Orthurethra with a very long, narrow kidney without dif- 

 ferentiated ureter. Respiratory surface of the lung plain. 

 Genitalia of Achatinellid type, except that the appendix 

 has no retractor muscle ; the penial retractor being simple and 

 inserted at the distal end of the penis; jaw and teeth as in 

 Achatinellidce, the teeth being rastriform, in oblique, V-shaped 

 rows. 



The shell is small, glossy, longer than wide, globose, ovate 

 or conic, perforate or closed, the aperture armed with a pari- 

 etal lamella and usually one or two columellar lamella or 

 folds. 



Distribution : Islands of the Pacific and Indian Oceans. 



This family is related, by its rudimentary albumen gland 

 and highly developed, multifid prostate gland to the Amas- 

 tridcr and Achatinellidc?. 



In the pallial organs Auriculella and Tornatettaria closely 

 resemble the AchatmelUda. The lung is very long, not visibly 

 veined, the mantle over it largely opaque white, with or with- 

 out black stripes (Auriculella}, or clear, spotted with white 

 (Tornatettaria}. Kidney very long, band-like ; the short peri- 

 cardium at its base (Auriculella pulchra) . 



The genitalia are intermediate in character between Aclui- 

 tincllida: and Amastridcu ; the sperrnatheca is lodged close to 

 the prostate gland, and has a long duct, as in the former fam- 

 ily, and the penial retractor is simple, attached to the penis 

 only, as in the Amastrida, though the attachment is apical, as 

 in Achatincllidcc. The appendix is shorter than in either fam- 

 ily, not exceeding the penis much in length, and it is not en- 

 larged distally. The vas deferens and retractor are inserted 

 at the distal end of the penis, the retractor being inserted dis- 

 tally on the lung floor. An eye-retractor passes between the 

 branches of the genitalia. 



PI. 22, fig. 2, genitalia of Auriculella pulchra, Waimano- 

 Manana ridge, Oahu. App., appendix ; h. d., hermaphrodite 

 duct; p. penis; p. r., retractor of penis; sp., spermatheca; 



