26 SUMMARY OF CURRENT RESEARCHES RELATING TO 



size from which a cord passes towards the ganglion complex, filling up 

 the inner part of the greater portion of the eye-stalk. Full details of 

 the histology of this organ, which is probably a skin sense-organ, are 

 given. 



Species of Acetes.* — Kamakichi Kishinouye describes a Japanese 

 shrimp which seems to be a new species of the genus Acetes, and has a 

 noteworthy peculiarity in the structure of the flagella of the second 

 antennae. The flagellum is about twice the total length of the animal, 

 and consists of a proximal and a distal portion. The latter is the longer, 

 and the two parts are connected by a series of short and somewhat pris- 

 matic joints, about ten in number and bent somewhat like the letter S. 

 The distal portion proceeds horizontally backwards, making nearly a 

 right angle with the proximal portion. The proximal portion is rather 

 stiff, and its joints bear very short hairs on the inner margin. The 

 outer margin is free of hairs, except on eight distal joints, each of 

 which shows a pair of very long ciliated hairs. Each joint of the distal 

 portion has a pair of long ciliated hairs on the outer margin, while its 

 inner margin is provided with short hairs in some joints. Some joints 

 in the proximal as well as the distal portion of the flagellum have the 

 distal margin serrated. These serrated joints are distributed at irregular 

 intervals. 



Caprellid in Lake Geneva.f — L. Blanc found in a plankton-haul 

 from a depth of 40 metres in Lake Geneva the female of a Caprellid, 

 that is to say a distinctively marine form. It occurred along with 

 Bythotrephes, Bosmina, and Dinobryon. It belongs to the genus Poda- 

 lirius, and is nearest P. minutus P. Mayer. Can it have been fortuitously 

 introduced from the sea by a migratory bird, or is it a true inmate of 

 the lake ? 



Subterranean Isopods.J — A. Dollfus and A. Yire give an account 

 of some Isopods of subterranean regions in Europe. They appear to be 

 to a considerable extent remnants of Tertiary fauna. Of the Sphaero- 

 midae there are four species belonging to three genera ; the family 

 Cirolanidse is also represented. The authors have given special atten- 

 tion to the sensory apparatus and brain. They find that the loss of the 

 sense of sight is compensated by hypertrophy of the tactile, auditory, 

 and olfactory organs. Motor cells and fibres are so multiplied in the 

 brain that the whole surface and volume are enormously augmented. 



Galvanotaxis of Entomostraca.§ — J. Paulsen has experimented with 

 Cyclopidse, and found that only by employing a high tension current 

 could a galvanotaxis be demonstrated. They were found to be nega- 

 tively galvanotactic. 



Revision of certain British Copepoda.|| — T. Scott has been led 

 through the study of much fresh material to make the following changes 



* Annot. Zool. Japon, v. (1905) pp. 163-7 (2 figs.). 



t C.E. VI. Congr. Internat. Zool. Berne, 1905, pp. 425-9 (4 figs.). See also 

 Zool. Zentralbl., xii. (1905) p. 748. 



\ Ann. Sci. Nat., xx. (1904) pp. 365-413 (2 pis.). 



§ Zool. Anzeig., xxix. (1903) pp. 238-44. 



|| Ann. Mag. Nat. Hist., xcv. (1905) pp. 567-71. 



