398 NOTES AND MEMORANDA. 



f. Miki\ Anatomie,' * wbicli is referred to by Dr. Klein iu a postscript, 

 in which he points out that Flemming's views on the structure of 

 cells and nuclei and the relation of the two do not in some respects 

 coincide with those already expressed by himself. In the third and 

 concluding part of his observations, he proposes to discuss in detail 

 these differences. 



B. INVERTEBRATA. 



Invertebrates of Kerguelen's Land.— Professor Studer gives somo 

 account f of the results of his stay in this island, the fauna of which 

 appears to offer some very interesting peculiarities ; four new species 

 of Cladocera are described and figured, one of the Ostracoda, and two 

 Copepods ; some remarks are made on the anatomy of Brada 

 mammillata Grube, which, it is concluded, belongs to the Pheruseidce 

 of Grube, although it differs from them in the want of tentacles and 

 branchias ; its coiled enteric canal, the gastric csecum, and the white 

 excretory glands are all points of resemblance ; the animal is dis- 

 tinguished by the presence of tubercular skin-glands, which form a 

 secretion by which particles of sand are united together to form a 

 closely fitting investment for the animal. A new species of the 

 interesting Chastopod genus Opliryotrocha is also described (the 

 specific name proposed is Claparedii) ; the two segments next to the 

 head carry no appendages, and are merely provided with a circlet of 

 cilia ; the next following all carry lateral foot-stumps ; the labrum 

 was simple and toothless, while the lower jaws carried seven project- 

 ing tooth-like ridges ; the cephalic lobes have only one band of 

 cilia ; this latter is of especial interest, as being an organ which has 

 not been lost, as it has been in most annelids, during the passage of 

 the creature from its larval to its adult state ; the condition of 

 maturity was indicated by the presence of ova. 



In a later contribution,+ Studer gives a list, with bibliographical 

 and other remarks, of all the animals known to live in Kerguelen's 

 Land and the surrounding sea. 



MoUusca. 



Blood-cells of the Acephala. — The cells of the blood of TJnio are 

 ordinarily found to be amoeboid in character, and provided with a 

 large number of sharply-pointed pseudopodia ; the plasma is colourless 

 and not highly refractive ; they vary in size in various Lamellibranchs 

 within comparatively wide limits ; they are generally provided with 

 a single nucleus, which is small as compared with the size of the cell, 

 and is granular ; a number will be observed to contain fatty matter. 

 The most striking point, however, is their tendency to develop long 

 processes, while under observation, and with these pseudopodia they 

 may manage to unite themselves into masses of a considerable size. 

 To the question as to how far this was a natm-al occurrence, Flemming 

 has addi-essed himself § A drop taken by the aid of a lupctte from a 



* See this Journal, ii. 137. 



t ' Arch. f. Naturgeschichte,' xUv. (1878) 102. 



X Ibid., xlv. (1879) 104. 



§ ' Archiv f. Mikr. Anat.,' xv. (1878) 243. 



