DR. RICHARDSON'S DESCRIPTION OF AUSTRALIAN FISH. 119 



bladder' cylindrical in the middle, obtuse above, tapering to a fine point below, and 

 extending about half way down the abdomen. Peritoneum blackish. 



The pelvis is connected to the symphysis of the coracoid bones by a long triangular 

 bone, whose inferior edge is thin and expanded vertically. The vertebrce are thirty-four 

 in number, twenty-one of them being posterior to the first ray of the anal fin. 



Dimensions. 



Inches. Lines. 



Length from tip of snout to tip of caudal fin ... 3 8 



Length from tip of snout to base of caudal .... 3 



Length from tip of snout to anus 1 9 



Length from tip of snout to beginning of ventrals . . 1 2^ 



Length from tip of snout to beginning of dorsal . . 9 



Length from tip of snout to tip of giU-cover ... 9 



Length from tip of snout to nape 7^ 



Greatest depth of body 1 1 



Highest dorsal spine 3 



Length of attachment of dorsal Ill 



Length of attachment of anal 7 



Length of pectoral ray (longest) 91 



Length of alimentary canal from guUet to anus ... 2 8 



Length of descending part of stomach 5 



Diameter of descending part of stomach H 



Diameter of intestine 1 



The colours of the fish are known only from the specimen preserved in spirits. 

 Above the lateral line it resembled the back of a mackerel ; the sides of the body and 

 head were silvery, with a little shading in the wrinkles of the skin, giving it a somewhat 

 scaly appearance ; there were no markings discernible on the fins. 



TiiYRSiTES ATUN, vuT. ALTivELis, High-finned Thyrsites. 



Thyrsites altivelis. Rich. Zool. Proceed. June 2.5, 1839, p. 99. 



Th. radiis pinnce dorsi spinosis, corpus altitudine fere cequantibus ; dentibus inter- 



maxill(E utriusque quatuordecim, in latere maxilla inferioris utroque duodecim. 



Radii.-Br. 7-7; P. 14 ; V. 115 ; D. 20|-l|ll et VIL ; A. 1|10 et VII. ; C. I7f. 



At the close of an elaborate account of Thyrsites atun in the ' Histoire des Poissons,' 



it is mentioned, that the Scomber dentatus of Forster, described in Schneider's edition of 



Bloch, presents all the characters of atun, except that the author states the number of 



rays in the first dorsal to vary from twenty to twenty-three, while in five examples of 



' The air-bladder was lost after it was detached from the body, and before it was minutely examined ; but 

 it seemed to have no processes at its upper extremity. 



