MEMOIRS OF TI1E QUEENSLAND MUSEUM. 
edge of lateral concavity before the tail. Depth, excluding spines (37-5), 2-7 in 
• total length (103) and little less than width (40). Anal or dorsal base (6) 41, 
caudal base (7) 3-5, height of dorsal or anal (12) 2-08 in head. 
Profile steep, emarginate ; snout pointed. Interorbital markedly concave. 
A small spine over anterior third of eye. Gill-opening more than half eye- 
diameter and situated below posterior half of eye. Carapace with more 
rugosities on head than elsewhere. Opening of carapace surrounding mouth a 
little less than eye diameter. Lips fleshy. Ten long, separate, blunt teeth in 
upper jaw, some of them movable ; eight similar teeth in lower jaw. Nostrils 
in a groove before eye. 
Carapace three-angled. A convex dorsal ridge extending from interorbital 
to dorsal fin and bearing two strong spines. Lateral ridges almost horizontal, 
not projecting strongly downwards, extending from sides of head to rear of 
carapace and each bearing a prominent spine below and before the first dorsal 
spine and preceded by a small spine ; another small spine below and before 
the origin of the dorsal fin but no spine on lateral ridge below eye. Ventral 
surface convex anteriorly, flattened or slightly concave posteriorly. Carapace 
closed above and below tail ; dorsally it ends as a rounded process but 
ventrally it is broadly truncate. Ten scutes between gill-opening and tail, 
about five between eye and snout, seven along dorsal ridge, nine down sides 
of body, and seventeen along median line of belly, those before anal space 
rudimentary. Caudal peduncle as long as snout. 
Dorsal high, its margin rounded, with the first ray simple and the rest 
branched ; anal similar to dorsal. Pectoral with upper rays longest and with 
a tubercle-like spine. Caudal rounded, a simple ray above and below. 
Colour, after long preservation, uniform brown, lighter on soft parts, 
spines and junction lines of scutes. Eye bluish. Teeth dark brown. 
Described and figured from a specimen which I designate lectotype of 
Lactophrys reipublicm Ogilby. It is 85 mm. in length from snout to base of 
caudal and comes from Moreton Bay, Queensland. Registered No. I. 1064 in 
the Queensland Museum. 
I have examined thirty-six specimens from the collections of the 
Queensland and Australian Museums from various localities, and regard them as 
referable to the same species though further work on larger series might show 
racial or varietal differences. 
Compared with the lectotype, young specimens from Moreton Bay (Qld. 
Mus. I. 325 ; Austr. Mus. I A. 4592) have two strong spines over eye, back 
more elevated, and spines on lateral ridges more pronounced. An anterior 
spine, on the lateral ridge, below the eye, is evidently lost with age. Fourteen 
to fifteen median ventral scutes in young specimens. The body scutes may 
also show growth-lines radiating from their centres to their corners and giving 
them a starry appearance. The largest Australian specimen of this species' 
