OF NEW SOUTH WALES. 409 



the female smooth internally and externally, with a row of fine 

 teeth on its superior surface; hand compressed and carinated 

 externally; arm, wrist and hand in the male all much dilated; 

 the first with three or four small teeth on its superior margin ; 

 the last not carinated externally ; fingers in both sexes 

 compressed, curved inwards, furrowed externally, finely den- 

 ticulated on their inner borders, which meet throughout their 

 entire extent. Second pair of legs equalling in length eight times 

 the breadth of the carapace. 



All the male specimens T have obtained are smaller than the' 

 female, and have the carapace less convex and almost smooth. 



Localitif, Port Jackson, at depths of about five to eight fathoms. 



2. — Stenonrhtnchus fissifrons, sp. nov. 



Carapace having a blunt spine and two tubercles on the gastric 

 region, placed in the form of a triangle, with the base forwards, 

 and the apex formed by the spine ; one prominent blunt spine on 

 the cardiac region, and three tubercles on each branchial region ; 

 a blunt, sub-bifid spine on the lateral border of the carapace, and 

 two small acute teeth situated below and behind it. Rostrum as in 

 preceding species, but the furrow separating the two halves 

 extending as far back as the line joining the posterior borders of 

 the orbits ; superior border of the orbit armed with a prominent 

 acute spine. Eyes, antennae, and maxillipedes as in preceding 

 species. Anterior limbs (in the female) much compressed ; arm 

 with three small acute teeth on its outer surface ; wrist with two 

 tubercles on its outer surface and two small teeth on its inferior 

 border ; hand with a row of short acute spines on its superior 

 and inferior borders ; its inner surface smooth ; the middle of its 

 outer surface obscurely tuberculated. 



The above description is from a single specimen — a female — 

 in Mr. Macleay's collection, from Auckland, New Zealand. 



Notes on the Anatomy of Birds. 1. — The Brachial Plexus of 

 Birds. By William A. Haswell, M.A., B. Sc. 

 The anatomy of the Brachial Plexus of Nerves in the Class 

 Aves has been described by various authors (e. g., Cuvier, 



