530 SUMMARY OF CURRENT RESEARCHES RELATING TO 



Isopod Parasitic in a Sacculina.* — Ch. Perez found numerous 

 examples of a Cryptoniscid (probably Eumetof) parasitic in a Sacculina 

 which infested a Pinnotheres commensal in a Spondylus. The " emboite- 

 ment " of parasite within parasite is interesting. The males were seen 

 coming and going through the cloacal orifice of the Sacculina ; as in 

 Hemioniscus, Crinoniscus, and other Cryptoniscid s, there is protandrous 

 hermaphroditism. The "males" cease to be male, and become "females." 



Cryptophialus striatus sp. n.f — W. Berndt describes a new boring 

 Cirriped which occurs in abundance in Chiton magni/icus, from the 

 Chilian coast. From the same locality Darwin described Cr. minutus, 

 which bores in the shells of the Gastropod Concholepas peruviana. 

 Berndt gives an account of the alimentary, nervous, and reproductive 

 systems, and shows how this new form differs from Darwin's Cr. minutus. 



Fixation of CoronulidaB in Skin of Cetaceans.! — A. Gravel makes 

 a preliminary note on this subject, referring to Coronula, in which the 

 proliferating epidermis of the cetacean insinuates itself into the lateral 

 canals between the outer and inner wall of the Cirriped shell ; to Cryp- 

 tolepas, in which the external wall seems to have disappeared, the lateral 

 canals are transformed into simple ridges, and the epidermis between 

 these binds the animal to its bearer in a very effective manner ; and to 

 Tubicinella, in which, according to Marlotte, there is a digestion of the 

 skin by peptonising substances. 



Organ of Koehler in Cirripeds.§— A. Gravel describes the structure 

 of the apparently sensory structure known as the organ of Koehler, 

 which is situated at the base and in the centre of the scales of Pollicipes. 

 It consists of a group of cells loosely or closely united ; and their inner- 

 vation issuing from the mantle and extending to the surface of the 

 scales points to a sensory function. In the scales of the upper part of 

 the stalk there is only one basal cell ; this also disappears, the nerve 

 atrophies, and only a minute hole in the chitin is left. 



New Canthocamptus from Idaho. |] — C. Dwight Marsh describes 

 Canthocamptus idahoensis sp. n. from the Alturas Inlet, Idaho. The 

 marked characters by which the species is easily distinguished are the 

 slender furca, and the remarkably slender fifth feet of both sexes. In 

 fact, it is possible that the peculiar characters of the fifth feet should be 

 considered of generic value. 



Free-swimming Copepods of Louisiana.! — E. Foster gives a series 

 of notes on the bathymetrical distribution and relative abundance of 

 various species in the neighbourhood of the Gulf Biologic Station, as a 

 contribution to the subject of the food of fishes. 



* Proc. Verb. Soc. Sci. Bordeaux, 1903, pp. 109-10. 



t SB. Ges. Natur. Berlin, 1903, pp. 436-44 (2 figs.). 



\ Proc. Verb. Soc. Sci. Bordeaux, 1903, p. 8. 



<} Tom. cit., pp. 90-1. 



|| Trans. Wisconsin Acad., xiv. Part 1 (1903) pp. 112-6 (1 pi.). 



^ Eeport Louisiana Gulf Biol. Station, 1903, Bull. No. 2 (1904) pp. 69-79. 



