HAWAIIAN NESOPUPAE. 313 



d\ With 5 or 6 teeth. 



Length about 1.75 mm., typical newcombi. 



Length about 1.5 mm., form seminulum. 



d 2 . With 9 or 10 teeth. formmultidentata. 



c 2 . Form narrower. form angusta. 



b' 2 . Angular lamella interrupted, having a low inward 



lamella. 



c 1 . Aperture with 5 or 6 teeth. subsp. interrupta. 

 c 2 . Aperture with 7 or 8 teeth. form disjuncta. 



a~. Inner end of the columellar lamella turned downward. 



subsp. gnampta. 



Pfeiffer originally described this species thus : 



"P. newcombi Pfr. T. subperforata, ovata, teuuis, lougi- 

 tudinaliter costata, haud nitens, diaphana, saturate f usca ; 

 spira inflata, apice acutiuscula ; anfr. 4 convexi, ultinius % 

 longitudinis subaequans, basi rotundatus ; apertura obliqua, 

 semicircularis, edentula; perist. tenue, vix expansiusculum, 

 margiue columellari subreflexo. Long. 2, diam. 1 mill. (Mus. 

 Cuming. et Coll. Nr. 2.) Habitat in insulis Sandwich (New- 

 comb)." 



This description appeared first in the Monographia Heli- 

 ceorum, later in Proceedings of the Zoological Society of 

 London. It will be noted that he termed it edentulous. Sub- 

 sequently, in the Monographia iv, 1859, he characterized his 

 former description as incomplete, and reprinted it except that 

 in place of the word edentula he substituted "dentibus 4 pro- 

 fuiidis coarctata: 1 parietali compresso, 1 subtransverso ad 

 columellam, 2 in palato ; ' ' the rest of the description, the meas- 

 urements, habitat, and collector standing unchanged. 



It has been surmised that he confused two species, one tooth- 

 less, like P. adniodesta, the other dentate ; but a more likely 

 supposition is that he did not see the teeth at first. This is 

 clearly what he implied by calling his first description ll in- 

 completus. ' ' 



The supposed types of newcombi in London, examined by 

 one of us (Cooke) are typical specimens of N. ivcsleyana Anc. ; 

 doubtless they had been substituted for the original examples. 

 Boettger has described the true neivcombi from specimens in 



