].9,20] Proceedings of the Academy of Science 13 



A New Method for Laying out Circular Curves. T. F. Hickerson. 



Appears in full in this issue as a new method for laying out 

 circular curves by deflections from the P. I, 



A Remarkable Form of Skeletal Element in the Lithistid Sponges {A 

 Case of Analogical Resemblance. H. V. Wilson. 



Appears in full in this issue. 



Animal Locomotion. H. H. Brimley. 



This paper treats of the means used in moving from place to place 

 bj^ the fishes, amphibians, reptiles, birds and mammals. The species 

 in each class are artificially grouped according to their main locomotion 

 characteristics. 



Together with what may be called their normal methods of pro- 

 gression, the paper treats of fish that can walk and mammals that 

 cannot ; of mammals that can fly and birds without such powers ; of 

 reptiles that possess the power of volplaning through the air; of fish 

 that travel while lying on the side ; of mammals that use three or 

 five members in their movements ; of others that spend their lives 

 upside down ; of fish that possess the power of movement through the 

 air ; of birds that swim and dive while young and lose such powers on 

 becoming adult ; of mammals possessing exceptional locomotive powers 

 both on land and in the water, and of birds that walk, fly, swim, dive 

 and climb. 



Single Spore Cultures of Coprinus radiatus. H. R. Totten. 



Reports the growth to maturity of Coprinus radiatus Fr. from a 

 single spore. Mycelia from a spore germinated in broth of horse 

 manure, and transferred to the following media, formed mature 

 plants : Horse manure, cow manure, horse manure agar, corn meal 

 agar, and peas. A review was given of Mile. Bensaude's thesis on 

 "Sexualite chez les Easidomycete, " Paris, 1918, in which she proves 

 that Coprinus fimetarius is a dioecious fungus. Coprinus radiatus was 

 compared with Coprinus fimetarius and was shown to be monoecious. 

 The hyphae of Coprinus radiatus also lacks the clamped connections 

 so commonly seen on hyphae and always seen on the hyphae of Co- 

 prinus fimetarius before the formation of mature plants. 



