22 4 



HELLER AND SNODGRASS 



anteriorly ; six pairs of pyloric caeca, the posterior one longest and 

 equalling the snout in length. 



Coloration in Life. Dark reddish-brown, the head darker brown ; 

 vertical fins like the body, the tips maroon ; pectorals with lighter 

 edges ; iris livid-bluish. 



Named for Mr. Timothy Hopkins, of Menlo Park, California, to 

 whose generosity the expedition is financially indebted. 



MEASUREMENTS OF THE TYPE OF PetrotjX 

 Catalogue No. 6344 Iceland Stanford Jr. University Museum. 



Length in mm 



Head 



Depth 



Eye 



Interorbital Width. 

 Snout 



Maxillary 



Height of Dorsal. 

 Height of Anal.... 



Pectoral 



Ventral 



Caudal 



Snout to Dorsal .. 

 Snout to Anal... 



217 



20 

 21 



2-5 



5 



5-5 

 ir 

 6 

 6 



12 

 15 



8 

 25 

 45 



Eutyx gen. nov. 



Characters. Body comparatively short, compressed posteriorly; 

 head broader, scarcely compressed, with a short rounded snout. Mouth 

 large, with long maxillary ; mandible included ; teeth small, in villi- 

 f orm bands in both jaws and in a V-shaped patch on vomer ; the inner 

 mandibular series of teeth enlarged ; palatines toothless ; opercular 

 bones without spines or sharp angles ; head with prominent mucif erous 

 canal openings ; lateral lines two on each side, overlapping for a 

 fourth of their lengths ; scales small, cycloid, embedded ; present on 

 body and opercles ; head above naked. Gills four, a slit behind last ; 

 pseudobranchiae wanting; gill-rakers few. Air-bladder moderately 

 large, oblong, thick-walled; pyloric caeca consisting of two short sacs. 

 Allied to Grammonus Gill, differing in the absence of opercular 

 spines, and in the presence of the double lateral line and large mucif - 

 erous canal openings on the head. 



EUTYX DIAGRAMMUS sp. nov. 



Pl. XIX. 



Type. Cat. No. 6346 Leland Stanford Jr. University Museum. 

 Tagus Cove, Albernarle Island. 



