206 PUPILLIDAE AND RELATED GROUPS. 



Prostate short. Male organs small and poorly differentiated ,•: 

 appendix weakly marked off from penial apex; epiphallus 

 apparently entering directly into side of penis. Penial re- 

 tractor bifid; arising from diaphragm and inserting on 

 appendix and epiphallus. Atrium very short. Radular 

 formula (fig. 11): 10 — 1 — (4 + 6); central half again as 

 broad as 1st lateral, tricuspid but ectocones with one or two 

 accessories; laterals and marginals fundamentally tricuspid 

 but with an increasing number of accessories or interstitials. 

 The remarkably broad central of Lyropupa appears to be 

 its most distinct anatomical character. Its genitalia seem very 

 similar to those of Nesopupa as figured by Steenberg (1925). 



Lyropupa (s. s.) microtrauma Ancey. 



An animal from Nuuanu, Oahu (Cooke; ANSP. 117154) 

 has the same radular formula and very similar teeth. 



Nesopupa (Limbatipupa) newcombi (Pfr.). Plate 28, figs. 

 12, 13. 



An animal from Kalihi, Oahu (Cooke: ANSP. 117154) 

 has similar (ovoviviparous) anatomy to that in L. perlonga 

 and only differences will be noted. 



Ovotestis (fig. 13) not lobed, with short-clavate alveoli; 

 carrefour more elongate. Spermatheca longer with sac near 

 apex of uterus. Penial retractor inserting around appendix 

 on apex of its penial arm. Radular formula (fig. 12) : 9 — 1 

 — (4 -j- 6) ; marginals often with fewer cusps. Jaw (f. multi- 

 dentata) with 11 plaits; similar to that of N. moreleti (pi. 31,. 

 fig. 6) in structure. 



This species has a broad central like Lyropupa. Similar 

 radulae were found in dried-in animals of f. multidentata C. 

 & P. from Glen Ada, Nuuanu, Oahu (ANSP. 44717; same 

 formula, with 97 rows) and of N. kauaiensis Ancey from Kipu^ 

 makai of Gap, Kauai (ANSP. 44743; one more marginal). 



Nesopupa (Nesodagys) w^esleyana Ancey. Plate 27, fig. 8. 



An animal from Kalihi, Oahu (Cooke; ANSP. 117155) has 

 the radular formula (fig.): 10 — 1 — (4 -|- 6) ; central and 



