FROM RHODESIA, LOPHOPODELLA THOMASI. 53 



beyond the base of the coenoecium, or polypidom, of this 

 Lophopus, where it looks to me like the deciduous tunic of the 

 first or original group, although I have had the opportunity of 

 examining the coenoecium on bodies (the shells of Paludina 

 benyalensis) from which it has never been removed. The group, 

 no doubt, can move from place to place if necessary, but its 

 habit is to remain fixed." 



From this short and incomplete description, and considering 

 the shape and character of its statoblast, it is clear that this 

 animal does not belong to, and has no affinity with, the genus 

 Pectinatella, and I have no hesitation to remove it to the new 

 genus.* 



In order to give a clear idea of the appearance of the stato- 

 blasts of these various species, I give a figure of those of 

 Lophopodella thomasi and Lophopus crystallinus, drawn for me 

 by Mr. F. R. Dixon-Nuttall, and reproduce the drawings of 

 Kraepelin and Carter for those of Pectinatella magnified and 

 Lophopodella carteri respectively. I may mention here that 

 Allman's figure of the statoblast of Lophopus crystallinus is not 

 quite correct, as the polygonal cells of the annulus are very 

 much smaller than there represented. 



I have not in this paper touched upon the anatomy nor the 

 development of the Polyzoa from buds, eggs, and statoblasts. 

 These details can readily be studied in the works mentioned in 

 the bibliography (1, 7, 10, 17, 20 7 \ 



A few words on the preparation and preservation of Polyzoa 

 may be acceptable. By adopting the following method, little 

 difficulty will be found in killing these animals fully extended. 

 A clean and healthy colony is placed in a watch-glass full of 

 water, and when fully expanded one drop of 1 per cent, solution 

 of cocaine or eucaine ((3) is mixed with the water. After five to 

 six minutes another drop is added, and so on until five or six 

 drops have been added. In twenty to thirty minutes from the 



* Since writing: the above I have seen in the British Natural History 

 Museum a slide of this statoblast made by Mr. Carter, from which I observe 

 that its affinity to that of L. thomasi is fully confirmed. The spines are 

 thin, with few hooklets, and vary in number from seven to fourteen on 

 each side ; the latter, shown in Mr. Carter's figure, is probably the greatest 

 number which he observed. • Would it not be possible for some micro- 

 scopist living in Bombay or Bengal to rediscover this animal and send 

 over some well-preserved specimen ? 



