306 E. A. MINCHIN. 



8, PiCTET, C. — " Recherclies sur la spermatogenese chez quelques Inver- 



tebres de la Mediterraiiee," ' Mitth. Zool. Stat. Neapel/ Bd. x, 

 Heft 1, pp. 75 — 152, pis. viii — x. 



9. WoLTERS, M. — " Die Conjugation und Sporenbildung bei Gregarinen," 



' Archiv f. rnikr. Anat.,' xxxvii (1891), pp. 99—138, Taf. v— viii. 



10. LuDWiG, H. — '•'Eoliinodermata," 'Bronn's Xlassen und Ordnungen des 



Thierreiches,' Bd. ii, Abth. 3 : " Holothurioidea." 



11. Sempek. — Remarks ou a Memoir by Marshall, " Ueber Autotomie 



Oder Selbstverstiimmelung bei Thieren," ' Sitzungsberichte d. Natur- 

 forsch. Gesellschaft z. Leipzig,' 1888-9, p. 87. 



12. KuNSTLER, J. — "Diplocystis Sclineideri (nov. gen., nov. sp.)," 



' Tablettes zoologiques,' ii, pp. 25 — 06, pi. ix. 



Addendum. 



While the above was in the press a new work appeared 

 byL. Cuenot, entitled "Comraensaux et Parasites des Echino- 

 derraes (Deuxierae Note)," in the 'Revue Biologique du Nord 

 de la France/ vol. v, part 1 (October, 1892). The author 

 describes the Gregarines of Synapta inhaerens and digi- 

 tata, which he now places in the genus Urospora, namely, 

 Urospora synaptse, Ray Lankester, and U. Miilleri, Giard. 

 The former of these is found under two forms in the adult 

 condition. Cysts are found in the coelom. The spores have 

 as a maximum four sporozoites; they have at one pole "a. tuft 

 [aigrette] of four little bristles/' at the other a caudal filament 

 two or three times the length of the spore. 



The author does not make any definite statement as to the 

 number of nuclei in the adult, so it may be presumed that 

 there is only a single nucleus. The spores seem to show some 

 resemblance to those of the forms described by me. The tuft 

 of bristles is doubtless homologous with the funnel in the spore 

 of my Monocystis irregularis and holothuria. The 

 presence of a caudal process to the spore is made use of to 

 place these forms in the genus Urospora. After what I 

 have said above on this point further comment here seems to 

 me needless. 



On the whole these forms from Synapta have considerable 



