OCMOlf BK i, 1895. ] 



SCIENCE. 



449 



Boai'd of Managers of the garden and its 

 Board of Scientific Directors for tlieir wis- 

 dom in securing a broad foundation and an 

 assurance of liberal management. 



The following papers were read before 

 the Society : 



Some notes on a revision of the genus 

 Mniuin, illustrated with specimens and pho- 

 tographs of types : Elizabeth G. Beitton. 



The New York Botanical Garden : N. L. 

 Beitton. 



A contribution to a knowledge of North 

 American phycophilous fungi : Geo F. At- 

 kinson. 



The genus Liriodendropsis : Arthur Hol- 



LIOK. 



The Laboulbeniacea? : Eoland Thaxtee. 

 Notes on aquatic fungi: Koland Thaxter. 

 A synopsis of North American rushes : 



FeEDEEICK V. COVILLE. 



Summary of a revision of the genus Di- 

 cranum : Charles E. Barnes and Rodney 

 H. True. 



Corrections in the description of Coscino- 

 doii Rauei and 0. Renauldi, and a compar- 

 ison of these species: Elizabeth G. Beitton 

 Chaeles E. Baenes. 



University or Wisconsin. 



SCIENTIFIC NOTES AND NEWS. 

 A NEW JURASSIC PLESIOSAUR FROM WYOMING. 



The writer has recently been fortunate 

 in finding in the Baptanodon Beds of the 

 Upper Jurassic of Wyoming the remains of 

 a large Plesiosaur, the first of the group 

 from the Jurassic found in America. The 

 horizon is below that of the large Dinosaurs. 

 The precise generic location of the speci- 

 men is at present difficult, until more of 

 the specimen has been detached from the 

 hard matrix. It is, therefore, placed pro- 

 visionally in the genus Oimoliosaurus, to 

 which the ascertained characters seem to 

 refer it. The species may be known as 

 C. rex. 



A centrum of a dorsal vertebra measures 



108 mm. in length by 130 mm. in trans- 

 verse diameter. An anterior cervical cen- 

 trum is deeply cupped on one end and 

 nearly flat on the other, and measures 65 

 mm. in length by 80 mm. in width. The 

 arch is united by suture, and the ribs have 

 a single attachment. The femur is about 

 1200 mm. in length (a portion of the shaft 

 is missing), 375 mm. in width at the distal 

 end, and 300 mm. at the head. A basal 

 phalange is 105 mm. in length, 65 mm. in 

 width at either end and 37 mm. through 

 the shaft. 



A full description of the' remains found 

 will be shortly given by Professor Williston 

 and the writer. W. C. Knight. 



the EARLIEST NAME FOE STELLER'S SEA 

 COW AND DUGONG. 



In ISll, Illiger published a number of 

 new genera,* proposing among others, 

 Rytina for the sea cow of Bering Island and 

 Halicore for the dugong of the Indian Ocean. 

 Nearly all recent writers on mammals have 

 adopted these genera, apparently overlook- 

 ing the fact that both animals had been 

 named before 1811. As early as 1794 Eet- 

 zius described the sea cow in the ' Handlin- 

 gar' of the Stockholm Academy of Science, 

 placing it in a new genus which he called 

 Hydrodamalisjf and the species, based on the 

 Vaeea marina of Steller, Hydrodamalis stelleri. 

 The generic description is sufficient to iden- 

 tify the animal even if the species and the 

 vernacular name used by Steller had not 

 been given. As Hydrodamalis has 17 years 

 priority over Rytina it should be adoj)ted as 

 the generic name of the northern sea cow. 

 The earliest specific name is that given by 

 Zimmermann in 1780, and the species should 

 stand Hydrodamalis gigas (Zimm.). The 

 abandonment of Rytina necessitates a change 

 in the name of the family {Rytinidai), which 



* Prodromns Syst. Mamm. et Avium. 

 tKongl. Vetensk. Acad, nya Handlingar, Stock- 

 holm, XV., Oct. -Dec, 1794, p. S92. 



