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Show 1885.] ON THE COXAL GLANDS OF MYGALE. 3 shades of pale reddish brown, and measured 1/1 inch by 0*75. They were much darker than eggs of Cyanopolius coo/ci (from Mr. Seebohtn's collection), also exhibited, and more pyriform in shape and not quite so large. Prof. Bell exhibited some models illustrating the paper of Rathke on the development of the great blood-vessels in the Vertebrates, which he had lately obtained for the Anatomical Museum at King's College from Ilerr Englert of Heidelberg. Mr. W . B. Tegetrneier, F.Z.S., exhibited a specimen of a Cat, which he referred to the Wild Cat {Felis catus), obtained in Donegal, and an example of a singular variety of the Black Grouse {Tetrao tetrix). The following papers were read :- 1. On the Coxal Glands of My gale. By PAUL PELSENEER, D.Sc. (Communicated by Prof. LANKESTER, F.Z.S.) [Received November 20, 1884.] (Plate II.) Two years ago Prof. Ray Lankester described and figured the position of an organ which he observed in the Scorpions, and which he called the " coxal gland " \ This gland, which, as he recognized, was not provided with an efferent duct, had been considered by Newport 2 and others as an appendage of the alimentary canal. Prof. Lankester announced at the same time that he had ascertained the existence of this organ in transverse sections of the cephalothorax of a large Myyale {Theraphosa) from South America ; and he identified these "coxal glands" with the " brick-red gland" described by Packard in Limulus 3. More recently4 he has again remarked on the existence of this organ in transverse sections of My gale {Gteniza) ccementaria, Latr. But in no Araneid as yet has the form and position of the coxal gland been either described or figured from an anatomical point of view; and as far as Mygale in particular is concerned, none of the authors who have occupied themselves with the organization of the genus have mentioned any organ which can be considered to represent this gland °. 1 " The Coxal Gland of Scorpio," Proceedings of the Eoyal Society, June 1882. 2 Philosophical Transactions, 1843, pi. xv. fig. 39. 3 " O n the Anatomy, Histology, and Embryology of Limulus polyphemus," Anniv. M e m . of the Boston Society of Nat. Hist 1880. 4 " On the Skeleto-trophic Tissues and Coxal Glands of Limulus, Scorpio, and Mygale," Quart. Journ. of Micr. Sci. 1884. 5 One can nevertheless recognize the presence of the coxal gland in a good 1* |