ENTOMOLOGY-AMPHIPODA.
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has communicated his observations on the development of the reproductiveorgans and spermatic fluids in the Crustacea . The filaments which Kolliker described as Spermatozoa are in his opinion Eilariee. He has also shownthat the apparatus with which the females are provided, for the safeguard oftheir eggs, consists either of legs imperfectly formed, or particular parts of thesame extraordinarily developed.
Th. Er. W. Schlemm, in an excellent inaugural thesis, De liepate acbile Crustaceorum et Molluscorum quorundam, has minutely investigatedthe structure of the liver in the river Cray-fish, as an example of the Crus tacea .
Lucas (Ann. Soc. Ent. Er. ii, 41, pi. 1) has illustrated some malforma-tions in different Crustacea of the genera Carcinus, Lupa, Homarus , andAstacus. These relate to supernumerary fingers belonging, some to thefixed, others to the moveable, half of the pincers.
Astacina. —Koch (Panz. Ins. Deutsehl. pt. 186 ; Deutsch. Crust. Arach.Myriap. pt. 36) has discriminated the four species of Astacus which occur inBavaria , A. flumatilis, E., A. torrentium, Schr., {Cancer), A. saxatilis andtristis, K., and has figured the first two.
A very remarkable species of Astacus has been discovered by Tellkampf,in the Mammoth cave in North America . It is entirely white, and sotransparent that ’the motions of the gills, and even of the internal organs,can be distinguished, especially in the younger individuals. The author hasaccordingly named it A.pellucidus. It has this further peculiarity, that theeyes are not prominent, but concealed under the cuirass (carapace). (Mull.Arch. Anat. 1844, p. 383.)
Carides. —Zaddach (ibid. p. 1) has admitted the Palcemon of theBaltic as a peculiar species, which he has characterized under the name rec-tirostris.
AMPHIPODA.
Gammarella. —Zaddach (ibid. 7) has formed a new genus, leptocheirus,for those sandhoppers which have pincers only to the first pair of legs, noprehensory feet to the rest, nor any subsidiary lash (flagellum) to the upperpair of feelers (antennae). They agree most nearly with Amphithoe, theprincipal distinction being that here, as in Talitrus, the feet of the secondpair are not formed for prehension. L. pilosus is a new species, from theBaltic. The proposed generic name cannot stand, as a genus of Coleop-terous insects already bears the name Leptochirus. Another new speciesfrom the Baltic also is Amphithoe rathkii. (Ibid. 6.) In addition, the author