A NEW CRUSTACEAN. 
By Melbourne Ward, F.R.Z.S., F.Z.S. 
(Plate XIII.) 
Superfamily THALASSINIDEA. Family Callianassidae. 
Genus CTENOCHELES Kishinouye 1926. 
Ctenocheles Kishinouye. Annot. Zool. Japan, xi, I. 63. 
Idem , Markarov Faune de IFUrss. Crust., x, 3, 1938, 77, fig. 29. 
Type. — C. balssi Kish., 
Type locality. — Ohsu, near Kashiwasaki, Niigata-ken, Japan. 
“Probably from deep water.’ 7 de Man. 
CTENOCHELES COLLINI sp. nov. 
(Plate XIII.) 
Type locality. — Mud Island, Moreton Bay, Queensland. 
This species is related to C. balssi and has been named after Mr. V. F. 
Collin, who collected and presented the specimens to the Queensland Museum. 
I am indebted to the director for the opportunity of studying the material. 
Altogether there are three complete specimens and two fragments. 
The species is remarkable for the greatly developed cheliped which 
separates it readily from the other known genera of the Callianassidae on the 
Australian coast. This character can best be appreciated by an examination 
of the figure ; the left cheliped is greatly reduced is size and differently shaped. 
In other respects Ctenocheles collini is a typical mud-dwelling crustacean, being 
lightly calcified, therefore soft to the touch, except for the characteristic chelae 
and anterior portions of the carapace which are hard. 
Description of the type . — Length from tip of the rostrum to telson 
120 mm. (approximately because of the soft condition of the abdomen). Carapace 
laterally compressed, the dorsal surface firmly calcified, rostrum developed in 
a simple spike, thin and entire ; the upper margin merging into a well-developed 
ridge extending almost to the cardiac region. Branchial region soft. 
Eyes not pigmented, small flattened, the inner edges of the stalks touching 
throughout their length, reaching slightly beyond the tip of the rostrum. 
Antennules more robust than the antennae. Antennae slender, the flagella not 
twice as long as the antennule. Mouth parts hairy, the third maxillipeds strongly 
toothed along the opposing edges. 
