l-'l''l IIaiis( ii: Oil S(Jiiic Califontiaii Scliizopoda 179 



tweiity-foiir or twenty-five somewhat sliort s])iries, tlie more distal 

 pairs decidedly longer tluui those on tlie proxinud liall'; the end 

 is truncate and had been furnished with a couple of spines lost 

 in the specimen, and between these spines an extremely small 

 pair of spines is discernible. In N. rayii the telson has only 

 nineteen to twenty-one or twenty-two spines on each lateral mar- 

 gin, and its most distal part is distinctly broader than in A". 

 franciscorum, the terminal part between the last pair of lateral 

 spines and the end being in A', nijiii liroader than long, in A'. 

 franciscorum only as broad as long. 



Judging from the conspicuous difference in the length of the 

 frontal plate between A', franciscorum and A^. rayii, together with 

 the smaller differences in the number of lateral spines and the 

 shape of the terminal part of telson, I am inclined to think that 

 A', franciscorum is a valid species. Unfortunately only a single 

 specimen has been seen. 



Zoological Museum, Copenhagen, Dcnmarl'. 

 Transmitted September 8, I'JIS. 



LITERATURE CITED 



CZERINIAVSKY, V. 



1882-83. Monographia Mysidariim imprimio Imperii Rossici (inarin., 

 lacustr. et fluviatilium) Fasc. I. Arb. St. Petersburg Naturf. 

 Ges., 12, Beilage, 170 pp.; Fase. II. Ibid., 13, 1-85, pis. 1-4; 

 Fasc. III. Ibid., 18. i-viii. 1-102, pis. 5-33. 



Hansen, H. .1. 



1910. The Schizopoda of the Siboga Expedition. Re.s. Siboga Exped., 



37, 123 pp., 16 pis. 



1911. The genera and species of the order Eiiphausiacea, with an 



aecouut of remarkable variation. Bull. Inst. Oceanogr. 

 Monaco, 211, 54 pp. 18 figs, in text. 



Holmes, S. ,I. 



1900. Synoi)sis of California stalk-eyed Crustacea. Oec. Papers Calif. 

 Acad. Sci., 7, 262 pp., 4 pis., 2 figs, in text. 



