THE SILVERSIDES OF THE GENUS MENIDIA. 261 
Menidia beryllina cerea, new subspecies. 
Menidia beryllina, H. M. Smith, Bulletin U. S. Fish Commission, 1891, 192 and 195; Kendall & Smith, 
Bull. U. S. Fish Commission, 1894, 21; Bean, Bulletin American Museum of Natural History, 
1x, 1897, 857; Bean, Annual Report New York State Museum, 1900, 102. 
Menidia gracilis, (in part) Jordan & Eyermann, Check-list, 351, 1896, and Fishes of North and Middle 
America, 797, 1896. 
As previously mentioned, a small Menidia, abundant at Woods Hole during the 
summer months, has hitherto been considered MM. beryllina or M. gracilis. A great 
many specimens have been examined, and there seems to be considerable variation, 
some specimens being markedly different from M. beryllina, others resembling it more 
closely. The relative measurements as usually taken do not show differences so 
much as similarities, so it will be necessary to state that most of those from Woods 
Hole seem to be much unlike M. beryllina, while those from Falmouth have a 
general resemblance but are considerably smaller. 
The New Bedford fish are mostly like those from Woods Hole, but larger speci- 
mens were obtained there which are hard to distinguish from the M. beryllina from 
St. Georges Island, Lower Potomac. 
Dr. Bean, having examined some of our specimens from Woods Hole, concurs in 
the opinion that they are the same species as those taken by him at Long Island in 
fresh water, notwithstanding the fact that many of the Woods Hole specimens were 
found in salt water and that the original beryllina is a fresh-water fish. 

Menidia beryllina cerea Kendall, new subspecies. 
A specimen from Cape Charles City, Va., seems to be much like the New Bed- 
ford fish just mentioned, but bears also resemblance to the Lower Potomac fish. 
The ©. beryllina-like forms found farther south appear to be like this specimen. They 
are intermediate in appearance between the Potomac M. beryllina and Woods Hole 
M. beryllina cerea. This arrangement is not the conventional idea of intergradation, 
but inasmuch as this Woods Hole form is so different from M. beryllina as to require 
some distinguishing designation, it seems that the best that can be done with it is to 
consider it a subspecies. 
This arrangement, then, will include specimens from Truro, Sandwich, Falmouth, 
Woods Hole, Wareham, and New Bedford, Mass., and Long Island, New York, Cape 
Charles City, Va., Albemarle Sound and Mattamuskeet Lake, North Carolina, and 
Sampit River, South Carolina. 
Total length 2.37 inches; head 4.14; depth 5.8; eye 2.8; snout 3.5; D. rv-i, 10; A. 
i, 15; seales 39. Smaller adult size than in M. beryllina, less compressed laterally; 
head bluntly conic; profile from front of eyes to tip of snout more rounded than in 
M. beryllina, outline of muzzle less truncate, and caudal peduncle usually shorter; 
lateral stripe narrow, occupying fourth row of scales, counting from front of dorsal 
fin. Color, waxy translucent, thickly punctated with black on top of head and 
back; dots on edges of scales excepting those of throat; snout and chin black from 
concentration of dots. 
