LIimEAN SOCIETY OF LONDON. 37 



Expedition of 1876-78 ; and last, though not least, we must re- 

 member to greet with the highest npprobation the splendid 

 monograph on the Turbeliarians which has been published in 

 Leipzig by Dr. Ludwig von Graff. 



MoLLUscA. — Vignol publishes a paper devoted to a careful 

 investigation of the nervous system of Mollusca, especially the 

 Gasteropoda (Compt. Eend. 244-251) ; M. Bouchon-Brandley 

 describes a unisexual sj^ecies of oyster (ibid. 256-259); Sarasin has 

 an elaborate paper on the development of Bithynia tentaculata 

 in Arbeit, zool.-zoot. Inst. Wiirzburg. Haller has been engaged 

 investigating the morphology of the Adriatic Chitons (Arbeit, 

 zool. Inst. Wien, 323-396) ; and Rabl has published an able 

 memoir on the development of tlie Prosohranchiata. The em- 

 bryology of the Bryozoa has been made the subject of a carefu 

 investigation by Barrois, who is led to regard the group as a 

 branch of the Yermes (Journ. Anat. et Physiol, xviii. 124-161) ; 

 and Friele gives in a memoir a full description of the Buccinidae 

 collected by the Norwegian Ai'ctic Expedition. 



Mybiopoda. — The late Prof. F. M. Balfour's posthumous paper 

 on the Anatomy and Development of Peripatus : the material 

 which he left (MSS., drawings, and prej^arations) was worked up 

 by Prof. H. N. Moseley and W. A. Sedgwick, and published in 

 the Quart. Journ. Micro. Science. 



Akacunida. — The mechanism and movements of respiration 

 of Arachnida have been investigated by M. Jules Macleod ; and, 

 as one result of his inquiries, he agrees with Lankester as to 

 the homologies between the lungs of arachnids and the gills of 

 Linmhis; but he thinks that their metamorphosis admits of 

 being explained in a more simple manner than that which has 

 been suggested by Lankester, and expounds his views on this in- 

 teresting subject by means of diagrams (Bull. Acad. E. Sci. Belg. 

 iii. 779-792). Lankester finds that a large pair of coxal glands 

 occur in Scorpions, which, botli in their structure and position, 

 are essentially the same as those whicb occur in Limuliis (Proc. 

 E. S. 95-101). 



Insecta. — E. Plateau has investigated the respiratory move- 

 ments of insects (Bull. Acad. Sci. Belg. iii. 727-737) ; and G. Ulim 

 has published a paper on tbe Parthenogenesis of the Bee, which 

 is remarkable on account of its altogether denying the fact, 

 apparently on the ground of well-conducted experiments (Amer. 

 N^at. xvi. 680-1). Erom America we also receive a highly 

 interesting monograph by McCook on the Plouey-ants. 



So much for the zoological and anatomii'al v\ork on the In- 

 vertebrata. As this Society is not so much concerned with the 

 Vertebrata, and as the past year has not been remarkable for its 

 production of researches on them, we need not travel into this 

 region of biological work, but may conclude by briefly considering 

 one or two of the more interesting researches bearing on general 



