ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 491 



Structure of Myzostomida.* — C, L. Boulenger leports ou a col- 

 lection of Myzostomida made by Cyril Crossland in the Red Sea. About 

 170 specimens were included, six of a new species, Myzostomum cross- 

 landi, two referable to 31. rubrofasciatum v. Graff, and the rest to 

 31. costatum Leuckark. The author gives an account of the general 

 structure of these species. 



Rotatoria, 



Male of Schizocerca homoceros.f — E. Nitardy describes the occur- 

 rence of this male in the plankton of the Grunewaldsee, near Berlin. 

 The male-producing eggs measure 80 x 46 /x, while the others — pro- 

 ducing females — measure 130 x 80 ya. The granulation is stronger 

 and less uniform in the male-producing eggs. Nitardy describes the 

 iiatching-out of the male, and notes the elongated stroke-like red eye, a 

 Piialler triangular red spot near the eye, and a few other points. 



Rotifera of Devil's Lake.J — C. F. Eousselet gives an account of the 

 plankton Rotifera of this large brackish lake in North Dakota, in which 

 so far only seven species have been met with — some in great abundance, 

 and nearly all of them rare and remarkable forms. Asplanchna silvestrii 

 Daday, a large species with double lateral humps in one of its poly- 

 morphic stages (previously known only from Chile) is described and 

 figured with the male. Brachionus satanicus, previously described from 

 this lake, is shown to possess a dimorphic form in the early spring ; small, 

 with short incurved posterior spines, and a foot-opening on the dorsal 

 side of the lorica. B. pterodinoides is figured and described as a new 

 species, its shape having a very considerable resemblance to a Fterodina, 

 with flat nearly circular lorica. The other species associated with the 

 above are FedaUon fennicum^ Brachionus spatiosus, and B. milUeri, all 

 known to favour sea or brackish water. 



Synopsis of the Rotifera. § — H. K. Harring has produced a tre- 

 mendous piece of nomenclature and bil)Iiographical work which will 

 be extremely helpful to the students of the class, but it is sad to see 

 what a fearful confusion a strict adherence to the present rules of 

 priority must lead to. Nearly all the familiar generic names under 

 which Rotifera have been known, described, and discussed for two gene- 

 rations — 3Ielicerta, Rotifer, CaUidina, Notops, Cathypna, Anursea, and 

 over twenty others — are gone, and replaced by quite unfamiliar names 

 never heard of except in some very old, obscure, and forgotten publica- 

 tion. Moreover, it is very confusing to transfer the name Floscidaria 

 from the well-known animals so designated for many years to those we 

 have been accustomed to write and think of as Melicerta — a result 

 admitted by the author to be unfortunate. The nomenclature of Rotifera 

 appears sufficiently complicated without adding to it by recognizing the 

 obvious mis-spelling of a generic name as a distinct genus. Of Bory 

 de St. Vincent, who is responsible for the greater number of changes in 



* Proc. Zool. Soc, 1913, pp 85-108 (4 pi?, and 7 figs.)- 

 t I.iit«rnat. Rev. Hydrobiol., 1913, Biol. Suppl., pp. 1-3 (7 figs.). 

 X Joura. Qus.lfett Micr. Club, xii. (April 1913) pp. 57-64 (2 pis.). 

 § Smithsonian Inst.. Bull. 81, Washington, 1913. 



