30 



M. J. cle Guerne on the 



Asplanchna Herricki, sp. n. (Fig. 2.) 



Herrick, " Final Report ou tlie Crustacea of INIinnesota, included in 

 tlie Orders CladoceraandCopepoda," pi. v. fig's. 8, 9 (in the Twelfth 

 Annual Report Geol. Nat. Ilist. Surv. of Minnesota, 1884), and 

 " Notes on American Rotifers," Bull. Sci. Labor. Denison Univ. 

 vol. i. p. Gl (1885). 



Diagnosis. — Femina. Corpus lageniforme ; masilla? clnobus tantum 

 ramis composita3, validas, margine interno fere recto, unco ro- 

 busto terminatoe, apice intcrue baud denticulato. 



Mas ignotus. 



Long, ? 



In the explanation of his plate v. 

 Herrick asserts that his Asplanchna is 

 hermaphrodite ; but this is not probable. 

 As to the resemblance between the 

 present species and A. BrightwelU, 

 indicated by the author in his second 

 memoir, this simply shows that the 

 comparison was not carefully made. 

 We have only to glance at the masti- 

 catory apparatus of the two types to ,, . '^ ^ <. 

 1 Trf J. l.^ Masticatory apparatus of 



Fig-. 2. 



see how different they are. 



Locality. Minnesota, United States. 



Asjylanchna Herricki 

 (after Herrick). 



Before Herrick, a German entomologist, Kramer^ well 

 known for his works on the Acarina, had the opportunity 

 (probably in seeking after the freshwater Acarina) of meeting 

 with a species of Asplaiichiia. Examined and figured by 

 Kramer, although imperfectly, tliis Rotifer has not received a 

 name. The form of its maxillse appears, however, to distin- 

 guish it from all its congeners. 



Asplanchna Kramerij sp. n. (Fig. 3.) 



Kramer, " Eine Bemerkung liber ein Raderthier ana der Familie der 

 Asplanchneen," in Archiv flir Naturg. Jahrg, 187G, vol. i. pi. viii. 

 figs. 1-4. 



Diagnosis. — Femina. Corpus globosum ; 



maxillse duobus tantum ramis compositse, 



curvatse, ad basin graciles, extremitate 



valida, cultriformi, margine interiore 



denticulato. 

 Mas ignotus. 

 Long:. 0*5 mill. 



Locality. Schleusingen ? 



Masticatory apparatus of 

 Asplanchna Krameri 

 (after Kramer). 



