34 [April, 



A communication from the Royal Society of Van Dieman's Land 

 was read, dated Hobart Town, 15tli September, 184-9, presenting a copy 

 of Part 1, Vol. 1, of their Proceedings, a collection of seeds of 150 

 species of plants, indigenous to Tasmania, and a specimen of Phasco- 

 lomys wombatus, and also requesting that a correspondence and a sys. 

 tem of exchanges be opened between the two Societies. 



Whereupon, on motion of Dr. Leidy, it was Resolved, That the 

 Academy will reciprocate the favor extended to it by the Royal So- 

 ciety of Van Diemen's Land, and that the Curators be empowered to 

 act accordingly. 



Mr. Peter A. Browne said that he had recently had an opportunity of 

 examining the hair on the head of a human foetus of five months, and 

 found it wanting in several peculiarities of the adult hair. 



On motion, it was Resolved, That the 8th volume of the Journal of 

 the Academy be presented to Hugh E. Strickland, Esq., of England. 



^pril 23d. 

 Dr. Morton, President, in the Chair. 



Letters were read : 



From the Zoological Society of London, dated Dec. 226, 1849, ac 

 knowledging the receipt of recent numbers of the Proceedings of the 

 Academy, and also of parts 1, 2 and 3 of vol. 1 of the Journal. 



Two letters from the " K. L. C. Akademie der Wissenschaften," 

 dated severally Breslau, 13th and 17th December, 1849, acknowledging 

 the receipt of the Proceedings of the Academy. 



Also two letters from the " Institute Royal des Sciences, &c. des 

 Pays Bas," dated Amsterdam, December, 1849, acknowledging the 

 receipt of the Proceedings of the Academy, and presenting a copy of 

 its Memoirs, 3d series, vol. 1, parts 3 and 4, its Journal of the same, 

 vol. 3, parts 1 and 2, and Annuaires of the same for 1847, '48 and '49. 



Dr. Leidy read a paper, intended for publication in the Journal, de- 

 scribing the following new American species of Annelida ab-ranchia : 



1. Nais gracilis, Leidy. 50 articulations. Length 5 lines,. 



2. Nais rivulosa, Leidy. 20 articulations. Length 3 lines. 



3. Pristina longiseta, Ehrenb. 



Strephuris, n. g., Leidy. Pedal spines alternating with setae, in two rows ; 

 upper lip moderately projecting ; girdle well marked ; number of articu- 

 lations not over 70 ; no muscular stomach ; blood bright red. 



4. S. agilis, Leidy. Length 1 to 11 inches. 



5. Aeolosoma venustum, Leidy. S articulations. Length l-40Th inch. 



6. Enchytraeus vermicularis, Ilenle. 



7. E. socialis, Leidy. Articulations not over 52. Length 5 to 10 lines. 



* 8. Lumbriculus limosus, Leidy. 170 to 224 articulations. Length 2 fo 4 in. 



Referred, on motion, to a committee consisting of Drs. Hallowell 

 and Morton, and Prof. Haldeman. 



