426 M. C. A. J. A. Oudemans on Endogenous 



peristoma tenue, antice parum effusum, flavescens ; columoUa iu- 

 ferue subdentata, 

 Diam. max. 10 millim., min. 8|, alt. 8. 



Hab. Foot of Mount Astrolabe, British New Guinea. 



Only a single specimen was obtained by Mr. Goldie at the 

 above locality. It is white, varied with a few transparent 

 spots, and an interrupted band of a reddish tint upon the upper 

 part of the last whorl and another on the under surface. Tlie 

 columella forms an angle or almost a tooth at the lower part, 

 where it unites with the basal portion of the peristome. 



EXPLANATION OF PLATE XV. 



F{</s. 1,1 a. Heli.r {Papuina) Tayloriana, Adams and Reeve. 



Fi(j. 2. Helix {Papuina) roseolahiata. 



Fig. 3. Helix (Papuina.) RoUsiana. 



Fi(j. 4. Helix (Acaous) coraliolabris. 



Fig, 5. Nanina Cairni. 



Fig. ('). Nanina Hunsteini. 



Fig. 7. Helix (Acavus) latiaxis, Smith. 



Figs. 8, 8«. Helix (Trochomorpha) Belmorei, Cox, var. 



Fig. 9. Helix (Geotrochiis) lacteolota. 



Fig. 10. Helicina solitaria. 



Figs. 11, 11 n. Helicina 7iovo-guineensis. 



Fig. 12. Helix {Papuina) alhocarinata. 



Fig. 13. Nani7ia exilis, Miiller, jun. 



Fig. 14. Helix {Sph(i;rospira) Rehsei, Martens. 



Fig. 15. Megalomastoma Brazierce. 



LIV. — Sporendonema terrestre, Oudemans, an example of 

 Endogenous Spore-formation among the Hyphomycetes. By 

 C. A. J. A. OUDEMANS*. 



It is one of the characters of the true Moulds or Hyphomy- 

 cetes that their spores or conidia are not produced in sporidia, 

 but by the upper parts of erect threads, that is to say free, 

 not enclosed, or, as has been said, exogenously. The conidia 

 are composed of one, two, or more cells — sometimes singly, 

 but sometimes also placed together in more or less consider- 

 able numbers, or again united into longer or shorter chains. 

 In the last case, the conidia which are situated furthest from 

 their origin are the oldest, and those nearest the origin the 



* From the ' Verslagen en Mededeelingen der Koninklijke Akademie 

 van Wetenschappen; Afd. Natuurkunde.' Derde Reeks, Deel ii. Am- 

 sterdam, 1886, pp. 115-122. 



