480 



Ostracion (Aracana) lenticvlaris, Giinther : Cat. Fish. Brit, 

 Mus., viii., 1870, p. 268; Macleay : Proc. Linn. Soc, N.S.AV., vi.^ 

 1881,' p. 33o. 



Aracana lentlcularis, Castelnau : Proc. Zool. Soc. Vict., ii.^ 

 1873, p 148, and Proc. Linn. Soc, N.S.W., iii., 1879, p. 401; 

 Waite: Mem. Austr. Mns., iv., 1899, p. 95, pL xvii., fig. 2, and 

 pL xviii., and Rec Anstr. Mus.. iv., 1902, p. 190, and Joe. cit., 

 vi., 1905, p. 82. 



A representative series of twenty-nine specimens, 102-300 

 mm. long, shows that this species varies in form to an extra- 

 ordinary degree, some of the variations being due to^ the 

 regular changes with growth, while others are merely indi- 

 vidual peculiarities. 



In the young, the supralateral and infralateral ridges of 

 the carapace are well defined, and sometimes armed with short 

 thick spines ; both ridges and spines usually become obsolete 

 in adults, but are sometimes retained. Small specimens have 

 the scutes very rugose with widely-spaced granules, and 

 elevated ridges radiating from central tubercles; these ridges 

 become more or less reduced with age, and some large speci- 

 mens have the carapace uniformly and minutely granular. 

 The snout is always oblique in the young, and rarely also in 

 adults, but larger specimens generally develop a more or less 

 prominent hump on the snout which may make its anterior 

 profile almost vertical. The carapace is usually compressed, 

 and the back and abdom.en form sharp crests; some speci- 

 mens, however, are much thicker, and the dorsal crest is 

 obtuse, while tiiat of the abdomen is almost obsolete. The 

 depth varies greatly, and in two specimens, 183 and 226 mm. 

 long, respectively, the greatest depth is r4-2 in the length, 

 exclusive of the caudal fin. 



The young and adult forms of this species have been 

 described ni detail and illustrated by Waite. The specimen 

 here figured is a particularly slender example, and is evi- 

 dently of the form which was briefly described by Kaup as 

 A. (jraiji. 



' loc. — Port Jackson, and near Sydney, New South 

 Wales; Shoalhaven Bight, New South Whales, 19-20 fathoms 

 (''Thetis" expedition) ; off Cape Three Points, New South 

 Wales, 23-34 fathoms ("Thetis" expedition); South Aus- 

 tralia; Fremantle and Mandurah, Western Australia. 



Anoplocapros gibbosus, n. sp. 

 PI. xviii. 



D. 9-11; A. 10; P. 1 + 11; C. 11. 



Length of head 3'2, depth of body r4-l-6 in the length 

 without the caudal rays. Snout r2-l*3, orbit 3'2-3'3, and 

 narrowest interorbital width about 2 in the head. Longest 



