10 STALK- AND SESSILE-EYED CRUSTACEA 
line, of which two are upon the gastric, and one, largest, upon the 
cardiac region. A large spine upon the branchial region, between 
which and the post-orbital tooth, are nine spines on the lateral margin, 
Posterior margin spinulose. Rostrum dilated at the extremity, with the 
angles broadly rounded, margin crenulate, two median divergent teeth. 
Orbits bi-fissate above, the inner fissure shut, the outer open. Pterygos- 
tomian region convex and tuberculated, not setose. Anterior legs very 
smooth, pale fuscous, hand and wrist obsoletely granulated, apices of 
the fingers black. Ambulatory legs compressed, densely pilose, third 
joint with a small terminal spine above. Length, ? in.; breadth, 
about 2 in. (S.). 
The specimens described by Stimpson were found at Port Jackson, 
examples from the same locality are in the Collection of the British 
Museum. 
New Zealand (Coll. Brit. Mus.). 
Family II. PHRICERID. 
Periceride, Dana (part), U.S. Explor. Exped. xii, Crust. part 1, 
p. 77, (1852). 
Maiide, Sub. Fam. Pericerine, Stimpson, Bull. Mus. Comp. Zool. 
i, p. L125.(18%0). 
Kyes retractile or not, within the orbits, which are small, deep, 
circular, and entire. 
The non-retractile eyes were considered by MM. Edwards and Dana, 
as characteristic of this family, as Stimpson, however, has pointed out, 
the eyes are often more completely retractile within the orbits in the 
Periceride, than in any other group, and the best characteristic of 
this family is to be found in the structure of the orbits themselves, 
which are never incompletely defined, as in the true Maida. 
PRIONORHYNCHUS. 
Prionorhynchus, Jacquinot and Lucas, Voy. Pole Sud. Zool. im, Crust. 
p- 5, (1858). 
Carapace narrowed anteriorly, tuberculated or spinose ;_ branchial 
regions well developed. Rostrum lamellate, directed obliquely down- 
ward, deeply notched at the extremity. Orbits small, ovate, not 
notched below, nearly filled by the short ocular peduncles. | Basal joint 
of the external antenne greatly developed, with three spines at its 
