482 



Loc. — Marsden Point, Kangaroo Island; Flinders Island, 

 Investigator Group, South Australia, 37 fathoms; Corney 

 Point, Spencer Gulf, South Australia. 



"Simplon" Station 4, 88-94 fathoms. 



Caprichthys, n. gen. 



This genus is allied to Aracana, but differs in having 

 the back elevated into a ridge instead of being broad and 

 flattened. It is distinguished from Gapropi/gia and Anoplo- 

 capros by having the caudal peduncle naked posteriorly 

 instead of encircled with a bony band. Carapace with six 

 ridges — a dorsal, an abdominal, two supralateral, and two 

 infralateral. Each lateral ridge with a single recurved spine, 

 which is broad and flat; a supraorbital spine present or 

 absent. 



Caprichthys gymnura, n. sp. 

 PI. xix. 



D. 12-13; A. 12; P. 1-fll; C. 10-11. 



Length of head, from the rostral end of the carapace to 

 the gill-opening, 3*3-3*5, depth of body 1*2 in the length 

 without the caudal rays. Narrowest interorbital width sub- 

 equal to the diameter of the orbit, which is 1*4-1*7 in the 

 snout ; snout, measured from the rostral end of the carapace 

 to the anterior orbital margin, 1*2-1*3 in the head. Longest 

 pectoral ray 1*1, dorsal 1*4-1*5, anal 1*4-1*6, and caudal 

 1*3-1*4 in the head. 



Back and belly each with a compressed keel ; the lateral 

 edges less pronounced though well defined. Snout somewhat 

 produced, a little compressed. Forehead flat between the 

 eyes, the orbital margins elevated; the younger specimens 

 have a flattened curved spine over each eye, directed upward, 

 outward, and backward, but the orbits are spineless in the 

 largest example. Spine of supralateral ridge in the anterior 

 portion of the hinder third of the carapace ; it is flattened, 

 curved, and striated, and directed outward, upward, and 

 backward. Infralateral spine similar, inserted behind the 

 verticle of the upper one, and directed outward, downward, 

 and backward. Gill-opening below or in advance of the 

 verticle of the hinder orbital margin ; the pectoral may be 

 wholly behind the eye, or the anterior portion of its base may 

 be placed below the posterior portion of the eye. 



Scutes of the carapace in close contact in the young, but 

 irregularly separated on the abdomen by naked areas in the 

 larger example, which has also a few free scutes around the 

 bases of the dorsal and anal fins ; those before the gill-opening 

 are more or less separated in all specimens. The scutes are 



