OF ARTS AND SCIENCES, 9 



mopterus Fendleri. Thaspium ? monlanum. Of Loranthacese, Pho- 

 radendron juniperinum, Engelm., with two Arceutholia which Dr. 

 Engelmann considers distinct from the A. oxycedri of the Old World. 

 Galium Fendleri, and G. asperrimum. 



" The following are the new Compositae of the collection, viz. : — 

 Clavigera hrachyphylla. Brickellia Fendleri. Aster Fendleri. Eri- 

 geron canum, E. cinereum, and E. Jtagellare. Townsendia Fendleri 

 and r. eximia, two interesting additions to a genus characteristic of the 

 region (and still another is added from farther south). Gutierrezia 

 {Hemiachyris) sphcErocephala. Franseria tenuifolia, and F. tomenfosa. 

 Bidens tenuisecta. Sanvitalia Aherti. Heterospermum tageliniim. 

 Lowellia aurea, a new genus allied to Dysodia. Schkuhria Neo- 

 Mexicana. Actinella argenlea, the most showy species of the genus. 

 Amaurial dissecla, also found by Fremont. Senecio Fendleri. Cir- 

 sium ochrocentrum. Crepis amhigna. Macrorliynclms purpureus. 



" Numerous species and several new genera are characterized in 

 notes to the memoir, of which the greater part are from the North- 

 Mexican collections of Dr. Wislizenus and Dr. Gregg." 



Mr. James D. Dana, of New Haven, presented a continuation 

 of his brief synopsis of the characters of the Crustacea ob- 

 tained during the cruise of the vessels of the United States 

 Exploring Expedition, as follows : — 



Conspectus Crustaceorum quce in Orhis Terrarum ciraimnavigatione, 

 Carolo Wilkes e Classe Reipubliccp. Fcederatce. Duce, lexit et de- 

 scripsit Jacobus D. Dana. Pars II.* 



Familia III. C A L A N I D ^ . 



Oculi simplices ; etiam ssepe alii duo inferiores deorsum spectantes. 

 Pedes mandibulares maxillaresque articulati et longe setigeri. Sac- 

 cuius oviger unicus. A7if.enn<^ anticce elongata?, non appendiculatse. 

 Antennoi posticcB apice setigerse. 



Genera notis sequentibus distinguenda : t — 



* Vide Partem I., Vol. I. p. 149. 



\ Membra pedalia Cyclopaceorum ordine seqiientia : — 



I. Pedes mandibulares duo (membra cejilialotboracis, ad normam, yuarta, — 

 ct. iv.). 



II. Maxillae duae (ct. v.). 

 vor.. II. 2 



