290 THE AMERICAN MONTHLY [Oct., 



Vorticella microstoma, Ehr. Infrequent. 



V. communis, From (?) Scarce. 



Litonotus fasciola, (Ehr.) Wrzes. Infrequent. 



Chilodon cucullulus, (Mull.) Ehr. Infrequent. 



ROTIFERE^. 



Polyarthra platyptera, Ehr. Scarce. 

 Monostyla lunaris, Ehr. Scarce. 

 Brachionus urceolaris, Ehr. Infrequent. 

 Anurea cochlearis, Gosse. Not infrequent. 

 Seven other forms were seen but their diagnosis is as yet un- 

 certain and hence omitted. 



CRUSTACEA. 



Cyclops quadricornis, (L.) Muller. Not common. 



Dnphnia pulex, (L.)Muller. (?) Only fragments thus far found. 



Bosmina longirostris, Baird. Thus far only fragments of this. 



VERMES. 



Anguillula fluviatilis, L. Occasional. 



The G^A^A Mixture. — This is an abbreviation for glycerine 

 (1 part,) water (2 parts,) alcohol (3 parts,) and is sometimes 

 called the 1-2-3 mixture. It is used for soaking vegetable sec- 

 tions before mounting them in Farrant's medium. 



Triassic Diatomaceae. — Dr. A. M. Edwards reports (Am. 

 Nat, Sei't. 1893), finding diatonjs in a clay pit near Passaic, 

 N. J., which he considers to be the first ever found in that geo- 

 logical formation. This Triassic clay contained Gomphonema 

 acuminatum and Brebissonia lanceolata associated with sponge 

 spicules. 



Deane's Medium. — Soak one oz. gelatine in 4 oz. of water 

 until the gelatine becomes soft, add 5 oz. of honey heated to a 

 boiling point, boil the mixture, then cool (but not stiff) add 2 

 oz. of rectified spirit and 5 drops of creosote. Filter through 

 fine flannel. 



Bubbles in Media. — Place the bottle in a pan of hot water 

 until the bubbles rise and disappear. 



