1885.] PEOCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 197 



The length of the example to caudal base is 141"'". The greatest 

 height equals ^ of this length, and the length of the head |. 

 D. 53 ; A. 40! 



Pleuronectes dentatus, L. 



LiNNi;, Syst. Nat., ed. xii, 458. 



No. 28, Garden. Plaice. 



The type of Fleuronectes dentatus, edition xii, page 458, is 240"™ long 

 to the base of caudal ; the total length is 280""'. The height of the body 

 is contained 3 times, and the length of the head about 4| times in the 

 total without caudal. The length of the maxilla is contained 9^ times 

 in the standard body length, and slightly exceeds the length of the 

 longest dorsal ray. The upper eye is very little in advance of the 

 lower, and is one fiftli as long as the head. The interorbital space is 

 very narrow. Teeth large, the longest one in front of the lower jaw 

 being 3"" long. The length of the maxilla is 20"™ and is contained 

 about 21 times in the length of the head. There are eleven large teeth 

 on the left side of the lower jaw and two minute ones behind these. 



Gill-rakers 5-16, the longest being 6"'™ in length, or about one half 

 as long as the upper eye. 



D. 84 ; A. 06 ; scales about 103. The dorsal begins above the front 

 margin of the eye. 



The pectoral is as long as the maxilla, and about equal to the longest 

 dorsal ray. 



The ventral is short, somewhat imperfect, one-fourth as long as the 

 head. 



Pleuronectes lunatus, L. 



LiNNfe, Syst. Nat., ed. xii, 459, 



No. 9 (Garden ?). 



The specimen of Pleuronectes lunatus in the Linne collection measures 

 245"™ to origin of middle caudal rays, 290 in total. The habitat is stated 

 to be '' in America septeutrionali." 



The height is contained 2^ times and the length of the head 4 times 

 in the length to caudal base. The maxilla, 26™'" long, is three-sevenths 

 as long as the head. The length of the upper eye is contained 5^ times 

 in the length of the head. The eyes are about even in front. The 

 interoi-bital space is very narrow, about one-third of the length of the 

 upper eye. The teeth are as large as in the preceding example; those 

 of the lower jaw are largely wanting. 



The dorsal begins above the front margin of the eye. Its longest ray 

 is about two-fifths of the length of the head. 



Gill-rakers 5-15, the longest 7"™ long, or about two-thirds of the 

 length of the eye. The rakers, as in the preceding specimen, are mi- 

 nutely dentate, and their width at the base is about one-fourth of their 

 length. 



The pectoral is very slightly longer than the maxilla. The ventral is 

 one-fourth as long as the head. 



