More recently (1905–1907) two important organisms have been described and included in this group, namely, _Neurosporidium cephalodisci_[238] (Ridewood and Fantham) from the nervous system of the prochordate, _Cephalodiscus nigrescens_, and _Rhinosporidium kinealyi_ (or _seeberi_) from the septum nasi of man. In the case of _Rhinosporidium_ and _Neurosporidium_, after the uninucleate spore has grown into a multinucleate trophozoite, the latter segments into uninucleate pansporoblasts, as in the preceding cases. A difference then occurs, for each pansporoblast enlarges, its nucleus divides and a “spore-morula” is formed. Thus a multinucleate pansporoblast or spore-morula, divided into many uninucleate sporoblasts (spore mother cells) is produced, and each sporoblast without further change becomes a uninucleate spore. [238] _Quart. Journ. Microsc. Sci._, li, p. 81. The Haplosporidia have therefore been divided by Ridewood and Fantham (1907)[239] into two sections:-- [239] See Fantham, _Brit. Assoc. Reports_, 1907, p. 553. (1) The _Polysporulea_, wherein the pansporoblast gives rise to a number of spores (nine or more), _e.g._, _Rhinosporidium_, _Neurosporidium_. (2) The _Oligosporulea_, wherein the pansporoblasts give rise each to a few (four) spores or to only a single spore, _e.g._, _Haplosporidium_, _Bertramia_, _Cœlosporidium_, _Ichthyosporidium_. [Illustration: FIG. 110.--_Haplosporidium heterocirri._ Section throughout wall of the Polychæte worm, _Heterocirrus viridis_, showing various developmental stages of the Haplosporidium. × 550. (After Caullery and Mesnil.)] [Illustration: FIG. 111.--Haplosporidian spores. _a_, _b_, _Haplosporidium heterocirri_. _a_, fresh; _b_, after immersion in sea water; _c_, _d_, _Urosporidium fuliginosum_. × 1000. (After Caullery and Mesnil.)] *Rhinosporidium kinealyi*, Minchin and Fantham, 1905. _Rhinosporidium kinealyi_, parasitic in man, must now be considered in greater detail. This organism was found in nasal polypus in India, and has since been recorded from the ear as small nodules in the external auditory meatus. The Indian cases came from the neighbourhoods of Calcutta and Madras, and the parasite has been seen in Ceylon. Similar structures have since been described from the United States and South America.