ENTOMOLOGY AMPHIPODA. 407 



has communicated his observations ou the development of the reproductive 

 organs and spermatic fluids in the Crustacea. The filaments which Kollikcr 

 described as Spermatozoa are in his opinion Filariae. He has also shown 

 that the apparatus with which the females are provided, for the safeguard of 

 their eggs, consists either of legs imperfectly formed, or particular parts of the 

 same extraordinarily developed. 



Th. Fr. W. Schlemm, in an excellent inaugural thesis, De hepate ac 

 bile Crustaceorum et Molluscorum quonmdam, has minutely investigated 

 the structure of the liver in the river Cray-fish, as an example of the Crus- 

 tacea. 



DECAPODA. 



Lucas (Ann. Soc. Ent. Fr. ii, 41, pi. 1) has illustrated some malforma- 

 tions in different Crustacea of the genera Carcinus, Lupa, Homarus, and 

 Astacus. These relate to supernumerary fingers belonging, some to the 

 fixed, others to the moveable, half of the pincers. 



ASTACINA. Koch (Panz. Ins. Deutschl. pt. 186 ; Deutsch. Crust. Arach. 

 Myriap. pt. 36) has discriminated the four species of Astacm\i\\\da. occur in 

 Bavaria, A. fluviatilis, F., A. torrentiitm, Schr., (Cancer), A. saxatilis and 

 tristis, K., and has figured the first two. 



A very remarkable species of Astacus has been discovered by Te Ilk amp f, 

 in the Mammoth cave in North America. It is entirely white, and so 

 transparent that the motions of the gills, and even of the internal organs, 

 can be distinguished, especially in the younger individuals. The author has 

 accordingly named it A.pellucidus. It has this further peculiarity, that the 

 eyes are not prominent, but concealed under the cuirass (carapace). (Mull. 

 Arch. Anat. 1844, p. 383.) 



CAKIDES. Zaddach (ibid. p. 1) has admitted the Palawan of the 

 Baltic as a peculiar species, which he has characterized under the name rec- 

 tirostris. 



AMPHIPODA. 



GAMHAKELLA. Zaddach (ibid. 7) has formed a new genus, Leptocheirus, 

 for those sandhoppers which have pincers only to the first pair of legs, no 

 prehensory feet to the rest, nor any subsidiary lash (flagellum) to the upper 

 pair of feelers (antennae). They agree most nearly with Amphithoe, the 

 principal distinction being that here, as in Talitrus, the feet of the second 

 pail- are not formed for prehension. L. pilosus is a new species, from the 

 Baltic. The proposed generic name cannot stand, as a genus of Coleop- 

 terous insects already bears the name Leptochirm. Another new species 

 from the Baltic also is Amphithoe rathkii. (Ibid. 6.) In addition, the author 



