Victorian Decapod Crustacea. 65 



Habitat. — Dredged off Shoreham, Western Port, in about five 

 fathoms on a sandy bottom. 



Observations. — This species is readily distinguished from the 

 next two hereunder described principally by its broader form, by 

 the disposition of the dorsal spines on the cephalothorax and by 

 the form of the abdomen. 



It does not appear to have close affinity to any member of the 

 genus as set out by Ortmann in his revision of the Family 

 Crangonidae.^ 



The type has been deposited with the National Museum. 



Pontophilus victopiensis, sp. nov. (PI. X., Fig. 2.) 



The cephalothorax is nearly one-quarter the total length 

 measured from the base of the rostrum to the tip of the telson. 

 The anterior margin is furnished with an obtuse concave rostrum 

 scarcely as long as the eye stalks. A prominent tooth occurs at 

 the outer angle of the orbit, and another forms the apex of the 

 antero-lateral angle, behind which there are two other teeth on. 

 each lateral margin. 



There is a marked depression at the base of the rostrum and 

 behind the eyes. In the median line immediately behind the base 

 of the rostrum there are three strong teeth projecting forward, 

 which make the carapace appear strongly carinate when viewed 

 from above. Behind each of the external orbital teeth there are 

 five more spines in a longitudal line reaching about three-fourths 

 the length of the carapace, and half way between the third of 

 these spines and the lateral margin there is another single 

 prominent spine on either side. 



The abdomen is about three times the length of the cephalo- 

 thorax and tapers gradually and regularly to the telson. 



The first segment is the shortest and slightly overlaps the 

 cephalothorax on its lateral margin. It is bordered in the centre 

 both anteriorly and posteriorly by a small uncalcified area, and is 



without any carina on its surface. 



The second segment is about twice the length of the first, and 

 carries a prominent median carina for two-thirds of its posterior 

 length, which is continuous through the next two segments. 



1 Ortmann : Proc. Acad. Nat. Sci. Philadelphia, 1895, pp. 173-197. 



