THE society's NOTE -BOOKS. 195 



Berg-mehl (Mountain meal, Norway).— Said to be the meal 

 with which peasants in times of scarcity sitisfy their hunger when 

 mingled with their flour. Pinmdaria nobilis (abundant); Pinnii- 

 laria diverge/is ; Eunotia ; Gomphonema ; Stauro7ieis. 



Holies Cliff, Virginia. — This is one of the finest Virginia series. 

 It contains Cosclnodiscus asieromphalus, apiciilatus, per/or atiis, 

 craspedodisciis ; Actinocydus Ehrenbergii ; Adinoptychus omphalo- 

 pelta ; Triceratium undulation. The Afitinocydi are generally 

 iridescent, with low powers. 



"Challenger" Expedition Dredgings, 1950 fathoms. — This 

 slide is most interesting, as showing how the strata at the bottom 

 of the sea are still being formed. Though much is Radiolarian 

 ooze, still, a portion is Diatomaceous. Some of the forms are very 

 prevalent, Cosdnodiscus lentiginosus having a little " fleck " on the 

 margin, having a bit of Fragilaria Aniardica lying upon it, the 

 " fleck " showing a little below, common ; Cosdfiodiscus Africanus, 

 var. Wallidiiana ; Cose, adinodiilus ; Adinocydus Oliverianus, 

 common ; Fragilaria Aniardica, very common. 



Sponge Sand.— This sHde shows how diatoms prevail every- 

 where. They were taken out of some common sponge sand, 

 which can be got from any chemist. The following is a list :— 

 Auliscus ccelatus ; A. coelatus, var. mergetis ; Navicula crabro ; 

 Endidya oceatlica ., covcvvixox^; Cerataulus Smithii ; Navicula lyra ; 

 N. Lesinensis ; Campy lodiscus limbatus ; Navicula quadriseriata. 



Ananino Polishing Paste (Syzran, Simbirsk, Russia). — Some 

 of these forms are very striking, especially the Adinoptychi, Aula- 

 codisci, and Triceratia. The following are on this slide : — Adi- 

 noptychus heterostrophus ; Adin. Simbirskianus , Adin. sedudilis ; 

 Aulacodiscus quadra?is ; Aula, proba bills ; Triceratium IVeissii ; 

 Cheloniodiscus Anafiinetisis. 



Oamaru Deposit.— This is the well-known New Zealand deposit, 

 so carefully described by Messrs. Grove and Sturt in the Quekett 

 Journal, 1884 — 1889. It forms a most interesting study, as so 

 many of the forms are peculiar. Amongst them are : — 



Rutilaria radiata, with zone ; Cosclnodiscus spiniferus ; Tricera- 

 tium coscinoides ; Trie, unguiculatmn ; Navicula sparsi-pundata ; 



