308 SUMMARY OF CURRENT RESEARCHES RELATING TO 



are more numerous than the females ; here, Artemia is viviparous in 

 winter, when, in most localities, it is oviparous. 



Artemia salina.* — C. Artom replies to Loeb's criticism of Schmanke- 

 witsch's experiments on Artemia salina, and indicates some mistakes 

 which the American physiologist has made. He states the following 

 facts : — (1) There are forms of Artemia probably parthenogenetic, which 

 live in fresh water, which remain Artemia, and do not become " Branchi- 

 pus ; " (2) there are forms of Branchipus (B.ferox&nd B. spinosus) which 

 live in salt water, which probably are not parthenogenetic, which remain 

 Branchipus, and do not become " Artemia " ; (3) there are forms of Artemia 

 which live in brine-pool water, which are not parthenogenetic, in spite 

 of the osmotic pressure to which the eggs are subjected in such localities. 



Cervical Cap in Nauplius of Artemia salina.f — Nicolas de Zograf 

 describes the rounded cap, Or " calotte," which occurs as an embryonic 

 organ on the cervical region and posterior part of the head in the 

 nauplius of Artemia. It has been noted by others in Branchipus and 

 Limnetis, but no detailed description has hitherto been given. The most 

 interesting point is that under the chitinous covering there lies a ring of 

 cells, with a nervous reaction when treated with the methods of G-olgi 

 and Ramon y Cajal. 



Reduction of Eyes in G-ammarids.J — F. Vejdovsky calls attention 

 to the interest of W. F. de Vismes Kane's observation that some speci- 

 mens of Niphargns Jcochianus from Lough Mask showed some optic 

 pigmenation. Along with the specimens sent from Lough Mask, there 

 were four which are referred by Vejdovsky to a new genus between 

 Crangonyx and Niphargus, and a description of this Bathyonyx de Vismesi 

 g. et sp. n., is given. The author discusses the state of the eyes in 

 Gammarus, Crangonyx, and Niphargus. The interest of Bathyonyx is 

 that it represents the first stage in degeneration of the eyes. Vejdovsky 

 also discusses the relations between Niphargus Jcochianus Bate, and 

 N. caspary Pratz. 



Indian Stalked Barnacles. § — Nelson Annandale makes a pre- 

 liminary report on the stalked barnacles collected by the ' Investigator.' 

 The collection includes six new species of Scalpellum, besides Megalasma 

 striatum sub-sp. minus nov., and Alepas xenophom sp. n. 



Leposphilus labrei.|| — A. Quidor has studied this parasite of the 

 lateral line of Labrus donovani. The adult female was discovered by 

 Hesse in 1866, the male by Carl Vogt in 1879. The author shows that 

 the body of the male consists of a head, five thoracic, and five abdominal 

 segments. Thus the family Philichthydse are typical and old-fashioned 

 Copepods. There is little difference between the male and the young 

 female in Leposphilus labrei. Parasitism brings about a reduction of 

 appendages, for the adult female has none, while the male has three pairs.. 



* Biol. Centralb., xxvi. (1906) pp. 204-8. 



t Comptes Rendus, cxli. (1905) pp. 903-5. 



X SB. k. BShm. Ges. Wiss., xxviii. (1905) pp. 1-40 (2 pis., 11 figs.). 



§ Ann. Nat. Hist., xvii. (1906) pp. 389-400. 



|| Comptes Rendus, cxlii. (1906) pp. 230-2. 



