ii8 
d' 1 8 — 23 cirrus segments; Pj with 14 — 15 segments, nearly as long as 
Pj and of the same character; the segments of P., beyond the fifth are 
only slightly longer than broad; arms 50 mm. in length (Saleyer). laevipinna 
d" 16 — 18 cirrus segments; P^ slender, becoming flagellate distally, less 
stout and stiff than P„, with 16 seo^ments; the seofments of P„ from 
the fourth onward are about half again as long as broad; arms 45 mm. 
long (w e s t e r n A u s t r a 1 i a) stiideri 
c- Pj has 10^ — 14 segments which bear fine spines on the distal angles 
d^ 21 — 23 cirrus segments, most of which are about twice as broad as 
long, the antepenultimate being nearly or quite as long as broad; P, 
has 12 — 13 segments; arms about 35 mm. long (Ceylon and 
vicinity) brevicirra 
d' not more than 20 cirrus segments 
e^ 15 — 20 cirrus segments; P, has about 13 segments; arms 35 mm. 
to 50 mm long 
f all of the cirrus segments broader than long-; outer segrments 
' of P„ less than twice as long as broad; 15 — 18 cirrus segments; 
arms 40 mm. long (P h i 1 i p p i n e I s 1 a n d s) iiiforviis 
f' outer cirrus segments about as long as broad; segments in the 
distal half of P, twice as long as broad; 14 — 20 cirrus segments; 
arms 35 mm. to 50 mm. long (southeastern Africa and 
Mauritius) modica ^) 
e- 10 — 15 cirrus segments, those beyond the fifth-seventh about as 
long as broad; V, has 8 — 1 1 segments; arms 35 mm. to 40 mm. long 
f ^ 1 4 — 1 5 cirrus segments ; P., has i i segments (Paternoster 
Islands) parva 
f" 10 — 12 cirrus segments; P„ has 8 — 9 segments (Celebes). . minima 
I. Decametra mylitta A. H. Clark. 
A. H. Clark. Ann. and Mag. Nat. Hist., series 8, vol. 10, 191 2, p. 36. 
Stat. 99. 6°7'.5N., 120° 26' E. Anchorage of North-Ubian Island. 16 — 23 Metres. 4 Ex. 
The centrodorsal is discoidal, the flat dorsal pole 1.5 mm. in diameter; the cirrus sockets 
are arranged in two closely crowded alternating rows. 
The cirri are XIX, 21 — 23, 10 mm. to 11 mm. long; the cirrus segments are subequal 
in length, the first very short, the second slightly longer, the third and following about twice 
as broad as long or slightly broader, the last three before the penultimate increasing slightly 
in length so that the antepenultimate is about one third again as broad as long; the earlier 
segments have the dorsal surface swollen and truncated distally so that the dorsal profile is 
l) Synonym Decametra mobiusi A. H. Claik. 
