192 Miscellaneous. 



The mesoderm spreads forwards from the blastopore, exhibiting 

 two symmetrical mesodermal bands running towards the ventral 

 surface. 



The shell-f/land arises as a double heap of mesodermal cells, which 

 histologically, as well as in size, are clearly distinguishable from the 

 surrounding cells. The two heaps of cells lie near the second pair 

 of maxillae, symmetrically placed with regard to the median line. 

 Each heap subsequently becomes transformed into a vesicle, and 

 sends out a hollow process which grows towards the second pair of 

 maxilla), and there meets with the ectodermal invagination. 



The heart in its earliest stage appears as a collection of mesodcrmic 

 cells ; the peripheral cells subsequently form a single-layered 

 epithelial cardiac wall, which encloses the cardiac cavity with the 

 cells lying centrally within it. 



As regards the generative organs, I arrived at no definite conclusion 

 as to their origin ; this much, however, I can positively affirm, — (1) 

 there are no special genital cells, which were already present in the 

 early stages of segmentation, and (2) the rudiments of the generative 

 organs are not to be detected even in the Kauplius stage. 



I reserve for the present any account of the development of the 

 nervous system. 



JS'ote. — The ova and embryos were stained with borax-carmine, 

 ha>matoxylin, and methylene blue, and each stage was examined in 

 longitudinal and transverse sections. — Zool. Anze'ujer, xiv. Jahrg. 

 no. 362, May 4, 1891, pp. 149-152. 



Note on Euherrichia, Grote. By A. G. Bctler. 



When commenting upon Grote's genus Uerrichia in the last 

 Dumber of the 'Annals' (p. 73) I was not aware that in his 

 ' lieviscd Check-list' the name Euherrichia hud been proposed to 

 supersede it : although not characterized and without a specified 

 type, this name will very likely be claimed to have priority over one 

 of my recently characterized genera ; but, as it is probable that the 

 Eriopvs (jraniiosa of Gucnee is generically distinct, 1 would s\iggest 

 that (this being the case) it should stand as the type of EuJurrichia. 



Antilope triangularis, a neiu Genus. By B. Lydekkek. 



In writing an article on African Antelopes I have found it very 

 inconvenient to refer to the anteloi)e described by Dr. (iiinther as 

 Antilope /rm;*f/»7(rr/6'imder that generic name, and 1 therefore think 

 it advisal)le to suggist the new name Doratoccros (whit'h 1 believe 

 to be unoccupied) for the animal in question. 



