

BY GEO. M. THOMSON, F.L.S. 49 



Hyale rupicola, Haswell New South. Wales). 

 Maera fasciculata, mihi (New Zealand). 



Tribe Brachyura. 

 Fam. Pinnotheridce. 



1. Finnixa fdba. Dana. 



I picked up a single specimen (female) of this small crab 

 on the beach near Hobart, and Mr. Morton has sent me a 

 number collected by himself from mussels, also all females. 

 I follow Prof. Haswell in assigning mj specimens to this 

 species, though it seems questionable to me whether all the 

 species of Finnixa and Pinnotheres are not referable to one 

 and the same slightly varying form. This species appears to 

 be common enough about Hobart, though it has not pre- 

 viously been recorded from Tasmania. 



Tribe Anomoura. 

 Sub- tribe Porcellanidea. 



2. PetrolistJies elongatus. M. Edw. 



Specimens of this shore crab, so common on the coasts of 

 New Zealand, were found imder stones between tide-marks 

 on the beaches in the neighbourhood of Hobart. It has not 

 previously been recorded from Tasmania. 



Tribe Macroura. 

 Fam. CaUianassidcB. 



3. Gehia simsoni. Nov. sp. (PI. I., figs. 3 — 5.) 



Front three-lobed, the carapace being produced in the 

 median line into a blunt rostrum, and the margins also 

 produced forwards into acute points. The anterior portion 

 of these margins and of the rostrum are crenately toothed 

 and somewhat hairy. External antennae three-fourths as 

 long as body, internal pair having the peduncle reaching as 

 far as the peduncle of the external pair ; both flagella 

 extremely short. First pair of legs very stout ; mesos broad 

 and flattened, with about four small teeth on its lower distal 

 margin, and one on its upper margin near the end ; carpus 

 with one strong tooth on the lower inner margin ; proj^odos 

 elongate sub-quadrate, the lower margin produced into a long 

 stout tooth; palm transverse ; dactylos nearly straight, acute, 

 very hairy, and twice as long as palm. 



In the general form of the front of the carapace (fig. 4), 

 this species resembles G. spinifrons (Haswell), but is dis- 

 tinguished by the almost total absence of spines by the form 

 of the hand in the first pair of legs, and by the absence of 



