SS^ PARASITIC PROTOZOA, 



such as klip fish {Ciinus siiperciliosus and Climis cottoides) , har- 

 ders (Mugil capita), Hottentots (Canfharus blochii), and Romans 

 {Chrysophrys gibbiceps). When the aforementioned fish were kept 

 in tanks in the marine aquarium, and were heavily infected with 

 the cihates,much mortaHty occurred among them. Erosion of tissue 

 of the piscine host was observed around each ciliate, and subse- 

 quently the scales fell oft. Dr. Gilchrist found it impossible to 

 keep such fish in certain tanks at St. James during October and 

 November, 191 7. When the infected tanks were kept without 

 fish for a period of about ten weeks, and were then 

 re-stocked, the infection reappeared, and the new piscine occu- 

 pants became parasitised. 



Anotlier ciliate, apparently belonging to the genus Tricho- 

 dina, was found on the gills of klip fish (Ciinus taunis and Ciinus 

 superciliosus) and bamboo fish (Box salpa). The ciliates were 

 only attached to the gills of the host during part of their life-cycle ; 

 at other times they swam freely in the water. A ciliate, belonging 

 to the genus Trichodina, was also found in the cloacal bladder of 

 the amphibian, Xcnopus Icevis. Sometimes the ciliate was attached 

 to the wall of the cloacal bladder, sometimes it swam freely in the 

 contents, and was rarely found in the rectum. 



Spiroch/ET/E. — In the blood of some young sand-sharks, 

 Rlunobatus annulatus, I found an interesting Spirochcrta, clearly 

 showing a dift'use nucleus in the form of a series of chromatin 

 granules. The parasite was often rather short and thick, but 

 varied in length, and had somew'hat acuminate ends 



( Read, July 10. 1918.) 



South African CoCCID;e — In the Bulletin of Ento- 

 mological Research * issued by the Imperial Bureau of Entomo- 

 logy. Mr. Chas. K. Brain, M.Sc, M.A., of the Division of Ento- 

 molog}', Pretoria, South Africa, contributes part 2 of his work 

 on the Coccidas of South Africa. Four gall coccidse are described. 

 " These are of particular interest, because no two of them are 

 similar, and more remarkable still is the fact that no two of 

 the insects belong to the same genus, nor apparently to the same 

 subfamily."' The species are as follows: — (i) Pseudococcinse : 

 Grewiacoccits^ g.n.. grcgalis, sp.n.; (2) Cissococcinse, Nov.: Cis- 

 sococcns fulleri, Ckll.; (3) Calycicoccinse, Nov.: Calycicoccus. 

 g.n. mcnvci, sp,n.; (4) Asterolecaniinae: Aniorphococcus acacicc 

 sp.n. The other species recorded as occurring fn South Africa 

 come under the following: — (5) Conchaspinse : Conchaspis eu- 

 phorbia: sp.n. ; (6) Diaspinge : Aspidiotus, in which the sub-genera 

 Aspidiotus (s.slr.), Selenaspidis, Morganella, Diaspidiotus, and 

 Hemilerlesea are recognized ; and Furcaspis, represented by 

 capcnsis (Walker). Green, and protea, sp.n. A synoptical key is 

 given covering 14 South African genera of Diaspinge, and also a 

 key to 26 species and i. variety of Aspidiotus. Five plates of 

 excellent illustrations are included. 



9 [2], (1918). 



