38 BULLETIN 81, UNITED STATES NATIONAL MUSEUM. 



DIPLOTROCHA Schmarda. 



Diplotrocha Schmarda, only species Diplotrocha ptygura, Schmarda, Denkschr. Akad. 

 Wiss. Wien, vol. 7, 1854, pt. 2, p. 22, pi. 6, fig. 7; unrecognizable; according to 

 Hudson, this animal was probably a young Rhizotan. 



DIPODINA Ehrenberg. 



Dipodina Ehrenberg, Froriep's Neue Notizen Nat. u. Heilk., ser. 2, vol. 24, 1842, 

 p. 184. 

 Type (monotype). — Dipodina arctiscon Ehrenberg, insufiiciently described. 



Dipodina arctiscon Ehrenberg, Froriep's Neue Notizen Nat. u. Heilk., ear. 2, vol. 

 24, 1842, p. 184. 



DISCOPUS Zelinka. 



Discopus Zelinka, Zeitschr. Wiss. Zool., vol. 47, 1888, p. 353; not Discopus Thomson, 

 1864, Coleoptera. 



Genus DISPINTHERA Gosse. 



Dispinthera Gosse, Journ. Royal Micr. Soc, 1887, p. 868. 

 Type (monotype). — Dispinthera capsa Gosse. 



DISPINTHERA CAPSA Gosse, 



Dispinthera capsa Gosse, Journ. Royal Micr. Soc, 1887, p. 868, pi. 15, fig. 18. 



Genus DISSOTROCHA Bryee. 



Dissotrocha Bryce, Journ. Quekett Micr. Club, ser. 2, vol. 11, 1910, p. 76. 



Type (by designation of Woodcock, Int. Cat. Sci. Lit., vol. 10, 1911, Zoology, 

 VI, p. 45). — Dissotrocha spinosa (Bryce)= Callidina spinosa Bryce. 



DISSOTROCHA ACULEATA (Ehrenberg). 



Philodina aculeata Ehrenberg, Abh. Akad. Wiss. Berlin (for 1831), 1832, p. 148. 

 Philodina aculeata medio-aculeata Janson, Uebers. Rot.-Fam. Philodinaen, 1893, p. 51, 



pi. 2, fig. 22. 

 Philodina aculeata crystallina Murray, Journ. Quekett Micr. Club, ser. 2, vol. 10, 1908, 



p. 220, pi. 16, fig. 8. 

 Dissotrocha aculeata Bryce, Journ. Quekett Micr. Club, ser. 2, vol. 11, 1910, p. 76. 



DISSOTROCHA MACROSTYLA (Ehrenberg). 



Philodina macrostyla Ehrenberg, Infusionsth., 1838, p. 500, pi. 61, fig. 7. 

 Dissotrocha macrostyla Bryce, Journ. Quekett Micr. Soc, ser. 2, vol. 11, 1910, p. 76. 



DISSOTROCHA PECTINATA Murray. 



Dissotrocha pectinata Murray, Journ. Royal Micr. Soc, 1911, p. 586, pi. 16, fig. 3. 



DISSOTROCHA SPINOSA (Bryce). 



Callidina spinosa Bryce, Journ. Quekett Micr. Club, ser. 2, vol. 5, 1892, p. 22, pi. 2, 

 fig. 3. 



Philodina spinosa Murray, Journ. Quekett Micr. Club, ser. 2, vol. 10, 1908, p. 223, 



pi. 15, figs. 5, 6. 

 Dissotrocha spinosa Bryce, Journ. Quekett Micr. Club, ser. 2, vol. 11, 1910, p. 76. 



