260 
Length of body, 37 mm. 
Length of carapace, 16 mm. 
Breadth of carapace anterior to the cervical groove, 
7 mm. 
Length of cheliped, 20 mm. 
Length of third leg, 26 mm. 
Length of ocular peduncle, 6 mm. 
A littoral species. Port Wiliunga, S.A, coast. 
Types in Adelaide Museum. 
This species differs from 1\ suhpilosus, Henderson, in tne 
following particulars : — The ocular peduncles are longer and 
slenderer. The ophthalmic scales are smaller and trispinose. 
The rostral tooth is more acute, and there is a strong depres- 
sion behind it on the carapace, and a short, median, longi- 
tudinal groove. Tne antennal flagellum is well ciliated, in 
the chelipeds the hand is not swollen behind. In the second 
and third pairs of legs the dactyli are not longer than the 
propodi, and the anterior borders of the last three joints are 
very spinose. Finally, the telson is quadrilobate. 
Family Porcellanid^. 
Genus ForcelUina, Lamarck, 
Porcellana rostrata, n. sp. PI. xxxv., figs, l, la, 16. 
Tne carapace is subpentagonal, sliglitly longer than 
broad, slightly convex benmd the protogastric ridges. The 
surface is uneven, being marked by numerous minute trans- 
verse strise ; some of the striae are more distinct, bearing groups 
of soft plumose setse, especially in the female ; two proto- 
gastric ridges are particularly thus indicated. The regions 
are well marked ; the cervical groove distinct. The postero- 
lateral regions are rounded and rugose, the rugae extending 
around the sides of the carapace to the pterygostomial region, 
but not uniting dorsally, as a nearly smooth space intervenes. 
The epibranchial regions are slightly tumid. A narrow, ae- 
pressed area borders the antero-lateral regions. The front 
viewed from above shows two prominent lobes, divided by a 
median sulcation, which extends gradually, oecoming shal- 
lower backward between the protogastric ridges ; from a front 
view the margins of these lobes show as two arches, the outer 
limb of each being much shorter than the inner, the two inner 
limbs uniting to form an almost vertically depressed, acute, 
median lobe or rostrum : the outer lobes, which form part of 
the inner margin of the orbits, are also depressed ; the edge of 
the front itself bears a series of small denticles, which extend 
to the antero-lateral margins. The antero-lateral margin is 
longer than tiie postero- lateral ; it is cristate, and shows an 
acute prominence at the external angle of tlie orbit, a distinct 
