8. DIAGRAMMA. 325 



mity of the frontal boues, one pair behind the other. The lower 

 portion of the brain-capsule is slightly compressed ; the basisphenoid 

 has two longitudinal ridges, with a groove between. 



The prceorbital is pentagonal, longer than high, and has several 

 irregular openings ; the remainder of the infraorbital arch is very 

 narrow. 



The prceoperculum is distinguished by its form, the posterior limb 

 being more than twice as long as the inferior ; the angle is rounded ; 

 four oblique openings lead into the interior of the channel. The 

 marginal serrature is veiy distinct, and coarsest at the angle. The 

 operculum is quadrangular, with the superior side emarginate, and 

 with a deep notch posteriorly ; the notch is between two points, 

 neither of which projects beyond the margin, and the lower of which 

 is the termination of a slight ridge on the interior surface of the bone. 

 The sub- and interoperculum do not show any peculiarity. The 

 snprascapula has a small irregular opening ; the glossohyal styliform, 

 broadest anteriorly. 



There are twelve abdominal and fifteen caudal vertehrce, the length 

 of the former portion of the column being to that of the caudal as 

 1 : 1-4. The neural spines of the first ten vertebraj are strong, broad, 

 and compressed, corresponding to a similar development of the inter- 

 neurals of the spinous dorsal. The first interhaemal is moderately 

 strong, and equal to the length from the second vertebra to the 

 eighth ; it is attached to the haemals of the twelfth and thirteenth 

 vertebrae. 



13. Diagranuna ciactum. 



Temm. Sf Schleg. Faun. Japan. Poiss. p. 61. pi. 2G. f. 1 (not good) ; 

 Richunkou, Ichth. China, p. 226. 



B. 7. D. jiig. A. |. L. lat. 62. 



The height of the body is one-third of the total length, the length of 

 the head two-sevenths ; the diameter of the eye is Ig in the length of 

 the snout, and 3| in that of the head. Lips tliick, swollen ; the upper 

 maxillary does not reach to the vertical fi'om the anterior margin 

 of the eye. Prajoperculum with the posterior limb vertical, and with 

 the angle rounded ; it is finely and equally serrated, some of the 

 dentieulations being directed upwards. The dorsal fin more or less 

 deeply notched, all the spines strong, compressed ; the fourth spine 

 longest, more than one-half the length of the head ; the second anal 

 spine much stronger and longer than the third, but shorter than the 

 longest of the dorsal. Caudalis slightly convex. The upper half of 

 the body and the vertical fins with large brown spots, those of the 

 body sometimes smaller. A light-brown band from the origin of the 

 dorsal to the base of the pectoral ; a second, curved, trom below the 

 middle of the spinous dorsal to the end of the soft dorsal ; a light- 

 brown ovate blotch below the anterior half of the soft dorsal. 



Chinese and Japanese Seas. 

 o. ,\dult. China. Presented by J. E. Reeves, Esq. 



