212 



HELLER AND SNODGRASS 



Scales large, subequal, smallest on the nape, larger on the sides ; 

 fifty six in a line from the angle of the opercle to the last vertebra. 

 Scales cycloid with the exception of a few on the sides which are 

 armed with several serrations medially. The body scaled excepting 

 the throat ; the head, fin membranes and disc naked. 



Dorsals separated by an interval equal to three fourths the length of 

 the maxillary. Spinous dorsal high, spines more or less free and flexi- 

 ble at the tip, third and fourth spines highest, contained one and one 

 fifth times in head. Soft dorsal longer and lower, rays of about equal 

 length. Anal fin similar to soft dorsal but lower and anteriorly more 

 rounded. Pectoral short, one and two fifths in head, obtusely 

 pointed ; caudal short, broad and truncate at the tip. Ventral disc 

 small, circular. 



Coloration in Life. Above dark brownish-olive, thickly spotted 

 with green and black spots the size of the scales ; sides of the body 

 lighter olive; head above and on sides blackish; belly dusky-olive, 

 unspotted, medially bluish ; disc amber-yellow, bordered anteriorly 

 with maroon ; dorsals dusky, maroon-tipped, the soft portion with a 

 black median stripe; pectorals dark brown, broadly maroon-tipped, 

 the basal portion olive with dusky spots ; anal blackish ; caudal 

 broadly maroon-tipped, the basal part dusky ; iris silvery. 



The shape of the teeth and distribution of the scales ally this spe- 

 cies to S. salvini of Panama from which it differs in the larger and 

 cycloid scales and in coloration. 



The species was found abundant in the streams about Chatham Bay. 



MEASUREMENTS OF Cotyloptis cocoensis. 



GOBIUS RHIZOPHORA sp. nov. 



Pl. XII. 



Type. Cat. No. 6349, Leland Stanford Jr. University Museum, 

 Tagus Cove, Albemarle Island. 



