122 GOBIIDiE. 



The skeleton of this si)ccies is extremely simihir to that of the 

 preceding : the transverse frontal crests, however, are not continuous, 

 or forming a straight line ; both have an oblique direction, and are 

 convergent anteriorly towards the interorbital space ; they do not 

 meet. 



20. Eleotris lateralis. 



Philypiius lateralis, Gill, Proc. Acad. Nat. Sc. Philad. 1860, p. 123. 

 D. 6 j|. A. ^. L. lat. 55. 



The height of tlie body is contained five times in the total length, 

 the length of the head three times and a third ; the eyes are at the 

 third sixth of the length of the head. The maxillaiy extends to the ver- 

 tical from the eye. Purplish-brown, with a black band along the side, 

 dividing about nine light vertical bands ; it is somewhat dilated at 

 the base of the caudal fin. Head with a dark vertical band from the 

 eye to the angle of the mouth, another from the inferior comer of 

 the orbit to the extremity of the operculum, and a third horizontal 

 one from the eye to the upper jaw. Pectoral with a black spot 

 superiorly at the axil, and with a blackish basal band edged with 

 whitish. Vertical fins spotted with white and black, sometimes 

 immaculate. (GUI.) 



Cape St. Lucas (Lower CaKfornia). 



The chief difference between this and the preceding species appears 

 to be the black lateral band ; otherwise they are very closely allied 

 to each other, and a comparison of actual specimens may show their 

 specific identity, 



bb. Palate entirely smooth : Eleotris (part.), Bleek. 

 27. Eleotris gyrinus. 



? Eleotris, sp., Gronov. Hits. Ichthyol. ii. p. 16. no. 168. 

 ? Gobius pisonis, L. Gm. i. p. 1206. 

 ? Gobius amorea, Artedi, TValb. iii. p. 205. 

 ? Eleoti'is pisonis, Bl. Schn. p. 68. 



Eleotris gyrinus, Cuv. 8,- Val. xii. p. 220. pi. 356 ; Cuv. Regne Anim. 

 Ill Poiss. pi. 81. fig. 2. 



D. 6 I -i-. A. |. L. lat. 60. Vert. 11/15. 



Scales rather small, those on the side of the head minute. The 

 height of the body is contained five times in the total length, the 

 length of the head three times and two-thirds. The eye is rather 

 small, one-half of the width of the interorbital space. Snout of 

 moderate length, with the lower jaw prominent; the maxillary 

 reaches to beyond the vertical from the centre of the eye. Teeth 

 villiform, in bands. Brown : vertical fins with broA\Ti dots ; temple 

 with tAvo darker stripes. 



Fresh waters of Martinique, San Domingo, Mexico, and Suiinam. 



a-b. Adult and half- grown. Prom the Collection of the Zoological 



Society. 



