PUPILLIDAE AND RELATED GROUPS. 205 



Pupisoma; preserved specimens of Lyropupa also appear to 

 have inverted ones, each with a definite retractor, although 

 their absence has been observed in living animals. 



Pronesopupa (Edentulopupa) admodesta (Mighels). Plate 

 28 figs. 1 and 2. 



Two specimens from Nuiianu, Oahu, collected by Dr. C. M. 

 Cooke, has been so long in alcohol and were so full of embryos 

 that only the penis is figured. 



Pallial complex very like that of Pupisoma comicolense; re- 

 curved ureteric duct closed over for at least part of its length. 

 Female genitalia similar to those of Lyropupa perlonga, with 

 large embryos even in vagina. Male organs (fig. 1) excep- 

 tionally large. Penis bifid ; epiphallar arm demarcated from 

 epiphallus by a swollen constriction; base of appendix with 

 thickened walls and entering through a small papilla. Penial 

 retractor arising from diaphragm and inserting near bases of 

 both appendix and epiphallus. Radular formula (fig. 2) : 

 11 — 1 — (5 + 6), with 106 rows; central tricuspid with an 

 accessory on each ectocone; inner laterals tricuspid with ec- 

 toconal accessories ; marginals usually fundamentally tricuspid 

 but with many interstitials. 



The penial appendix in Pronesopupa is better demarcated 

 than in Pupisoma; the differentiation of the male genitalia in 

 both genera is in marked contrast to the weak development in 

 Lyropupa, Nesopupa and Bothriopupa. 



Pronesopupa (s. s.) acanthinula (Ancey). 



Specimens from Nuuanu, Oahu (Cooke) have the same 

 radular formula and very similar teeth to P. admodesta. 



Lyropupa (Mirapupa) perlonga (Pease). Plate 28, figs. 

 10, 11. 



A specimen from Luakaha, Nuuanu Valley, Oahu, collected 

 Aug. 3, 1933 by Dr. Pilsbry, has male genitalia. 



Ovotestis is in newcomhi; carrefour (fig. 10) ellipsoid. 

 Uterus of non-gravid example with an apical, spongy swelling, 

 continued by a longer one that appears glassy. Spermatheca 

 of short type with sac imbedded in uterus ; vagina quite long. 



