156 



CALIFOKNIA ACADEMY OF SCIENCES 



Measurements in Hundredths of Length without Caudal. 



Length without caudal, in mm 



Head 



Depth 



Maxillary 



Eye 



Horizontal limb of preopercle from behind fold in mandible. 



Vertical limb of preopercle 



Length of pectoral 



Length of ventral 



Length of fifth dorsal spine 



Longest anal rays 



Height of caudal peduncle just behind base of dorsal 



Length of longest caudal ray in upper lobe 



Family TETRAODONTID^. 



286. Spheroides angusticeps {Jenyns). 



Not seen by us; recorded from Panama by Jordan and Gilbert (1882 n, 

 p. 631) from the Bradley collection, and by Jordan and Bollman (1889, p. 183). 



287. Spheroides lobatus (Steindachner). 

 Obtained at Panama by the Albatross; not seen by us. 



288. Spheroides testudineus (Linnaiiis). 



Probably rather rare at Panama, where four specimens were taken. Compared 

 with others from Jamaica, they seem to show a slight diflference in the length of the 

 head and snout, but our series is insufficient for the verification of this distinction. 

 Our specimens are much bleached, so that nothing can be made out except the pat- 

 tern of coloration, which agrees with that of the Jamaica specimens. No satisfactory 

 comparisons can be made as to the size of spots, or the distinctness of markings. 



This species differs from S. nnnulatus in having the interorbital space (bone) 

 narrower, the dorsal and anal shorter, the spots a trifle larger, and the termination of 

 the dorsal and the anal further from the caudal, the insertion of the fins being more 

 anterior and the base shorter. As the interorbital increases in width with age, only 

 specimens of about the same size should be compared in this respect. 



