428 Scientific Intelligence. 



pubescentibus. Pedes sexti corpore fere duplo longiores, minute mul- 



/// 



tiarticulati. Pedes septimi perbreves. — Long. 9 

 Hab. in mari prope Rio Negro Patagonise. 



New Haven, October, 1849. 



2. Gammaracea. — The following recent genus is not included in the 

 Synopsis of Gammaracea given in this volume, p. 135. 



"" Ephipphora, White, (ml Ma|f[3], i,226, 1848.)— Head rather 

 large ; antenna distant from each other, the upper pair with the basal 

 joints very thick and corneous, inserted in a deep notch in front of 

 head ; two setae at the end of each, the outer the thicker. Lower pair of 

 antennae with the basal joint somewhat elongated and furnished with hairs. 



11 Body much compressed, the lateral appendages on the first eight 

 joints very large, and nearly concealing the legs; the appendage of the 

 fourth joint much dilated behind at the end ; eighth to eleventh joints 

 slightly keeled on the back ; appendages of the three last joints of the 

 abdomen longish, with short spines on the edge behind. 



" A genus allied to Orchestia and Talitrus. 



"Sp. Ephipphora Kroyeri." * * # * 



The description is hardly full enough to decide whether the genus is 

 related most closely to the Orchestidee or Gammaridse. The large size 

 of the basal joint of the upper antennas, together with the large epime- 

 rals appear to show that it belongs with the Callianassinse ; and it may 

 be identical with one of the genera in which the superior antennae are 

 appendiculate. J. D. Dana. 



IV. Astronomy. 



1. Elements of the planet Hygeia, (Comptes Rendus, July 2, 1849.) 

 M. Gasparis, of Naples, who discovered this planet April 12, 1849, 

 has furnished the following elements of its orbit, derived from the obser- 

 vations of April 29, May 7 and 16, 1849. 



Epoch, May 1, 1849. 



Mean Anomaly, . . . 326° 34' 22 y/ -44 



Longitude of perihelion, . . 242 47 3 '44 



it u 



node, . • . 2S5 32 29 '72 



3 46 51 27 

 0-5192506 

 9 2478343 



Inclination, 



Log. a, 



Log. c, 



Mean daily motion, . . . 590"-3784 



The 



telescopic comet discovered April 11, 1849, by Geo. P. Bond of the 

 Cambridge (Mass.) Observatory, (vii, 449) was detected the same night 

 by M. Schweizer of Moscow. From the observations of April 14, 20 

 and 24, M. Sonntag has computed the following parabolic elements : 



Perihelion passage, 1849, June . 8-20514 Berl. m. t. 



Longitude of perihelion, . . . 267° 7' 6" 



" asc. node, . . 30 32 36 



Inclination, • . . . 66 54 5 



Perihelion distance, . . . 0-89391 



Motion, . Direct. 





1748 



