70 
THE VOYAGE OF H.M.S. CHALLENGER. 
3. Rostrum terminating in two lobes which may be distally acuminated or tuber- 
culated : — 
Micippa spinosa, Stimpson. South and East Australia ; New Zealand, to 38 
fathoms (var. affinis). 
Micippa curtispina, Haswell. North and North-East Australia. 
4. Rostrum terminating in two long, narrow, acute lobes or spines : — 
Micippa thalia (Herbst). Oriental region. 
None of the species have, I believe, been recorded from deep water. 
Micippa spinosa, Stimpson (PI. VIII. fig. 2). 
Micippa spinosa, Stimpson, Proc. Acad. Nat. Sci. Philad., p. 217, 1857. 
,, „ Haswell, Cat. Australian Crust., p. 26, 1882. 
,, „ Miers, Ann. and Mag. Nat. Hist., ser. 5, vol. xv. p. 8, 1885. 
Paramidppa spinosa, Miers, Cat. New Zealand Crust., p. 9, 1876. 
„ „ Crust. Rep. Zool. Coll. H.M.S. “Alert,” p. 199, 1884. 
South Australian coast, 2 to 10 fathoms, April, 1874 (an adult male); Port Jackson, 
6 fathoms ; on the Sow and Pigs Bank (an adult male and three females) ; Port Jackson, 
8 to 15 fathoms (three females). 
The adult male from 2 to 10 fathoms measures : — 
Adult $ . Lines. Millims. 
Length of carapace and (dellexed) rostrum, rather over . . 9 19 - 5 
Breadth of carapace, . . . . . . . 15 - 5 
Micippa spinosa, var. affinis, Miers (PI. VIII. fig. 3). 
Paramidppa affinis, Miers, Ann. and Mag. Nat. Hist., ser. 5, vol. iv. p. 13, 1879. 
Micippa spinosa , var. affinis, Miers, op. dt., p. 9, 1885. 
In this well-marked variety the carapace is suboblong, depressed, deeply concave on 
the hepatic regions, with the dorsal surface somewhat uneven and closely granulated ; on 
the gastric regions are usually two somewhat larger granules, placed one behind the 
other and followed by one on the cardiac region ; the lateral margins bear some larger 
tubercles which tend to become short spines ; of these, three or four are on the sides of 
the hepatic regions, and one or two on the sides of the branchial regions ; the fissures of : 
the upper orbital margins and the postocular spine are small ; the inferior margin of the 
orbit is deeply concave ; the front is obliquely (nearly vertically) deflexed, subspatulate, 
with the lateral margins parallel, slightly indented at the base, the antero-lateral angles 
rounded, not toothed, the distal extremity with a very small triangular notch. The 
basal antennal joint is nearly smooth, and is without spines at its distal extremity, and 
