NORTHWESTERN MEXICO. 3 17 



Fam. Plotid^. 



299. Plotus anhinga Linn. 



" " Finsch, Abh. nat. Ver. zu Bremen, 1870, p. 362. 



Mazatlan, Bischoff; Rio Mazatlan, Grayson. 



" Common in the fresh water lagoons, Mazatlan River and Rio Santiago ; numerous in the small river of 

 Tepic, and Lake Chapula, near Guadalajara. In this region it is a constant resident, and builds its nest in 

 trees, near, or over, fresh water-lagoons or streams." 



Fam. Pn^TnoRNiD^E. 



300. Phceton cethereiis Linn. 



" " Finsch, Abh. nat. Ver. zu Bremen, 1870, p. 362. 



Coast of Michoacan, Xantus. 



" Usually found for out at sea and in tlie Gulf of California. Breeds on the Island of Isabel, near San 

 Bias." 



Fam. Labid^. 



301. Lams delawarensis Ord. 

 Mazatlan, Grayson. 



" Common in winter months only." 



302. Chro'icocej>halus atrlcilla Linn. 

 Mazatlan, Grayson. 



303. Chroicocejjhalus franhUnii (Swains.). 

 Mazatlan, Grayson. 



" Specimens procured in December ; a few others were seen in that month, but it is not common in this 

 locality." 



304. Chroicocejjhahis Philadelphia (Orel.). 

 Mazatlan, Grayson. 



"A few individuals were seen, and specimens procured, in a fresh-water lagoon near the sea-shore, March 

 27th, 1868. I have not seen one since." 



305. Blasipus heermanni (Cass.). 

 Mazatlan, Isabella Island, Grayson. 



"Not common, specimens shot on the sea beach near Mazatlan, in February and March; a winter visitant." 



306. Sterna galericulata Licht. 



" " Finsch, Abh. nat. Ver. zu Bremen, 1870, p. 359. 



Mazatlan, Isabella Island, Grayson. 



" Common througliout the winter months, and until the latter part of March, when they congregate on the 

 beaches in large numbers, and in a short time disappear from this locality for their breeding grounds." 



HnUOIItS BOST. SOO. KAT. HIST. VOL. II. 80 



