ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 201 



slightly club-shaped ; the number of rings was about twenty-seven ; no 

 stigmata could be seen ; the posterior end showed the anus and a genital 

 aperture. The author adds a few more details in regard to a type which 

 still remains inadecmately known. 



f . Crustacea. 



Genital Pores in Norway Lobster.* — D. C. Mcintosh has examined 

 over 3000 specimens of JSFephrops norvegicus, and has combined his 

 results with those previously noted by F. H. A. Marshall. Out of 4237 

 males 9*8 p.c. had other than the normal two spermatic openings. 

 Sixteen different arrangements have been noticed, and the total observed 

 range in number of genital openings is from one to six. Marshall 

 observed one case of seven. Of the forms showing variation, # 5 p.c. 

 had one, 72*3 had three, 21 "1 had four, 4-7 had five, and 1*4 p.c. had 

 six. Out of 2061 individuals only 76 were females ; out of 4491 less 

 than 5*7 were females, all with two oviducal openings. The author 

 adheres to a view previously expressed that the females being smaller 

 than the males escape from the trawl net more readily. 



Fossil Idoteid.f — E. G-. Racovitza and R. Sevastos describe Proidotea 

 haugi g. et sp. n., a fine fossil from Oligocene strata in Roumania. It is 

 to be referred to the vicinity of Chiridotea Harger and Mesidotea 

 Richardson, and the author establishes for the three genera a new sub- 

 family Mesidoteini. They form " a natural group, of very ancient 

 origin, completely isolated from the rest of the Idoteids." 



Maxillary Glands of Cirripedes.J — A. Defner has studied the 

 structure of these glands in Lepas, Gonchoderma, and Balanus. The 

 relations of the terminal saccule and the urinary canal are carefully 

 worked out. Of importance is the demonstration of a rod-cuticle and 

 plasmic striations in the epithelium of the urinary canal, for this 

 establishes the homology of this part with the urinary canal of the 

 nephridium in other Crustacea. 



Geographical Distribution of DiaptomidaeJ — M. Annunziata 

 Tollinger has done a laborious piece of work in summarizing the distribu- 

 tion of Diaptornidae and some other fresh-water and brackish-water genera 

 in the family Centropagidae. He uses his results in reference to general 

 problems, such as the derivation of fresh-water forms from a marine 

 stock, the systematic relationships of the genera, and the modes of 

 dispersal. 



Revision of North American Species of Cyclops. || — C. Dwight 

 Marsh notes that most of the American species are identical with those 

 in Europe, and that many have a wide range of variation which has led 

 to the premature erection of new species. Following Schmeil's treatise, 

 he has revised the North American species and provided a useful key. 



* Proc. R. Phys. Soc. Edinburgh, xviii. (1911) pp. 145-53 (1 fig.). 



t Arch. Zool. Exper., vi. (1910) pp. 175-200 (2 pis. and 18 figs.). 



X Arb. Zool. Inst. Univ. Wien, xviii. (1910) pp. 183-206 (1 pi. and 2 figs.). 



§ Zool. Jahrb., xxx. (1911) pp. 1-302 (4 pis. and 178 figs.). 



|| Trans. Wisconsin Acad. Sci., xvi. (1910) pp. 1067-1134 (10 pis.). 



