38 
AUSTRALIAN FRESHWATER AND LAND CRAYFISHES 
Engaeus fultoni Smith and Schuster. 
Plate X, Fig. 6. 
E. fultoni Sm. & Sch., Proc. Zool. Soc. Lond., 1913, p. 126. 
E. fossor, Clark, Viet. Nat., liii, 1936, p. 66, fig. 2; Mem. Nat. Mus., Viet. 
X, 1936, p. 42. 
Length of average adult speeimen 53 mm. 
Rostrum slender, reaehing base of third segment of first antennae; apex 
sharp and upturned ; carinae sharp, earned well baek on to the earapaee. 
Squame of seeond antennae long and slender, sharply pointed. Inter- 
antennal spine short, broadly triangular, bluntly pointed. Exopod of third 
maxillipedes either long and slender, or indieated by a small papilla. 
Sternal keel slender and sharp; first three pairs of lateral proeesses small, 
eaeh with a eonspieuous round opening; proeesses between third pereopods 
srnall and somewhat flattened, slightly grooved, lateral margins blunt, eaeh 
with a small round opening under the lateral margin ; proeesses between 
fourth pereopods long and stout. 
Telson narrowly eone-shaped, almost as long as uropods, with a spine on 
eaeh lateral margin; inner rami of uropods rounded, eaeh with a sharp 
spine on outer lateral margins near posterior margin, divided by a longi- 
tudinal median earina ending in a sharp spine near posterior margin ; outer 
rami rounded, with a spine on outer lateral margin above the transverse 
suture, eaeh divided by a longitudinal median earina, ending in a spine at the 
transverse suture, suture plaeed at the posterior third of uropods, numerous 
small spines along the suture. 
Great ehelae short and stout, almost twiee as long as broad ; propodus 
with one row of large tubereles, and one or two rows of smaller tubereles 
along the upper margin, lower margin with a tubereulate earina posteriorly, 
and a smooth earina anteriorly, eutting edge with two large and several 
smaller tubereles; daetylus short and stout, upper margin smooth or 
punetate, one or two large and several small tubereles along the eutting 
edge. Carpus and merits eaeh with a row of tubereles along the upper 
margin. 
Posterior pleurobraneh long and well developed. 
Habitat. — Victoria : Beeeh Forest, Otway Ranges, Ferntree Gully. 
Types in the National Museum, Melbourne. 
Ill a iirevious paper (2) this species Avas confused with 
two other species, imdei* the name E. fossor Erichson, 
Specimens received from Smithton, Tasmania, were taken 
as typical E. fossor, but material received later from the 
Tasmanian Biological Survey contained examples of the true 
E. fossor. These specimens are quite distinct from the 
Smithton examples. In a later paper (4) E. fossor was re- 
described and the Smithton example described as E. ignotus. 
Comparison of the larger series of Tasmanian specimens 
with Victorian specimens has warranted the reinstating of 
E. f ultoni for the Victorian species. 
Readily separated from E. ignotus and E. fossor by the 
form of the squame of the second antennae, the rostrum, and 
the sternal keel. 
