Miscellaneous. 273 



Brady, but recorded by J. C. Thomson as occurring near Liverpool. 

 Brady describes D'las longiremis, Lillj., as British ; two other Euro- 

 pean species are D. hijilosus, Giesbr., and D. intermedins, Poppe ; 

 and Mr. Norman has described a species under the name of Dias (?) 

 Mossi. 



With regard to the oviposition of the species of this genus, the 

 author remarks that Lilljeborg described D. longiremis as bearing 

 its eggs united into a single packet on the ventral surface of the 

 abdomen, but that no one else has seen the ova in this situation, 

 and that Giesbrecht suggested that the notion was founded on the 

 analogy of the other Calanidae. This view would seem to be con- 

 firmed by an observation of Grobben, who found the ova of Dias 

 longiremis, with others, free in his aquaria. 



3. Temora longicornis, Miiller. 



Exceedingly abundant at "Wimereux as throughout the European 

 seas. 



In connexion with this species the author discusses in some 

 detail the characters and peculiarities of the genera Temora, Baird, 

 and Temorella, Glaus. The former genus, established by Baird in 

 1850 upon the above species (which he identified with the Mono- 

 culus finmarcliicus, Gunn.), was increased in 1853 by the addition of 

 T. velocc, Lillj., and in 1866 of T. armata, Glaus. In 1876 Hoek 

 described T. Clausii from the brackish water of the fortifications of 

 Leyden, and in 1880 Poppe noticed a form nearly allied to the latter 

 under the name of T. affinis, from the fresh and brackish waters of 

 the great estuaries of North Germany. In 1881 Glaus concluded 

 that T. velox had been described from the male of T. affiyiis and the 

 female of T. Clausii, so that it must be suppressed, and he indicated 

 differences in the characters of the species which led him to found 

 the genus Temorella for T. Clausii and ajffinis. In the same year 

 Giesbrecht arrived at nearly the same conclusion, and proposed the 

 establishment of two subgenera — Halitemora= Temora, Glaus, and 

 Eury temora = Temorella. He described a new species from Kiel 

 under the name of Euryt. hirunclo, and finally adopted Claus's 

 nomenclature. Temorella lacustris was described in 1887 by Poppe 

 from the lakes of Westphalia ; and it was noted by Nordqvist, in the 

 same year, from Lake Ladoga under the name of T. intermedia. 



Thus Temora, with the species longicornis and armata, and Temo- 

 rella, with the four species above indicated, differ in their mode of 

 existence J the former being more thoroughly marine, while the 

 species of the second genus can exist even in the fresh water of lakes 

 and rivers. The author indicates briefly the distinctive characters 

 of the two genera. The anterior antennae are shorter and more 

 robust in the females of Temorella, and the right anterior antenna in 

 the male Temora has theflagellum longer and more numerously jointed 

 than in Temorella. The inner maxillipedes are shorter and thicker 

 in Temorella. The appendages of the fifth thoracic segment in the 



Ann. & Mag. N. Hist. Ser. 6. Vol. ii. 19 



