196 



ON HADBA GULOSA, GOULD. 



By C. Hedley, F.L.S. 

 (Plate xxix.) 



Hadra gtdosa, Gould, having been instituted by that author, the 

 type of his genus Badistes, and by Pilsbiy the type of the sub- 

 section of that name, it is desirable that an account of its soft 

 parts should be placed on record. On acquiring two living speci- 

 mens from Dr. Cox and Mr. Brazier, the opportunity is accord- 

 ingly embraced of publishing the following observations. 



Gould states, Otia, p. 18, that H. jjedesh-is, imitates in its gait 

 the geometer caterpillars and progresses Ijy looping its foot into 

 undulations instead of by the usual sliding motion practised by 

 other helices. On p. 243, he transfers this extraordinary action 

 to the credit of //. gnlosa, for which, apparently on account of 

 this supposed peculiarity, he creates the genus JJadistes. I have 

 carefully observed the animal of gulusa, and have never seen any 

 such gymnastic evolutions perfoi-med by it. However Messrs. C. 

 T. Musson and C. J. Wild, both keen observers, have separately 

 remarked this habit in Chloritis brevipila, and it seems probable 

 that it is to this animal and not to gnlosa that the observations 

 of Drayton (Gould's collector) refer. 



The color of this animal appears to vary greatly. A specimen 

 from Bulli presented by Dr. Cox, possessed a bright orange-red 

 mantle margin, body and tentacles pale ochreous brown, darken- 

 ing behind the tentacles and passing into orange-red on the tip of 

 the tail, sole of foot light ochreous brown. Another specimen 

 contributed by Mr. Brazier from Lawson, which is situated at a 

 height of 2400 feet on the Blue Mountains, diifered wholly from 

 the foregoing, having the mantle-margin a creamy yellow, the 

 body and tentacles coal black with ashy tubercles, sole of foot 

 dark ashy blue. When extended the animal measured about 5.5 

 mm. in length, the tail projecting about 10 mm. behind the shell; 

 tentacles 12 mm. in length. The facial area is defined by two 

 not very distinct grooves which run upwards and Ijack wards from 

 tlie lips to the mantle. Along the median dorsal line two rugae 

 or sets of rugae bound a furrow which proceeds from the mantle 

 and terminates between the tentacles. On either side of these 

 about six ranks of long narrow tubercles extend from the mantle 

 outwards and downwards. The genital orifice appears in the 

 right facial groove behind the right tentacle. The tentacles taper 



