78 
shaped with produced distal edges-, radials with numerous 
prominent rounded tubercles on the dorsal surface ; cirri with 
26 — 31 segments; P, and Pg with about -20 segments 
(Straits of Malacca to Singapore) singularis 
c- the outer cirrus segments bear dorsal tubercles or short spines, which 
develop very gradually 
d^ 31 — 43 (usually over 35) cirrus segments 
e^ the longest and stoutest pinnules at the base of the arm have 
from 20 to 25 segments; P^ is from half again to twice as 
long as Pj; 16 — 24 arms 
f^ Pg the largest and longest pinnule, with 20 — 22 segments; 
Pj almost as long as Pg; cirri with 32 — 40 segments of 
which the outer bear small dorsal tubercles or spines 
g^ the longest cirrus segments are slighdy longer than broad ; 
the short distal segments are but little longer than broad ; 
rather small, though sharp, dorsal spines are developed 
from the 20'*^ segment onward (southwest of the 
mouths of the Irraw add)' River) pulchra 
of-^ none of the cirrus segments are lonsfer than broad; the 
outer bear small dorsal tubercles, and the terminal some- 
times prominent spines (Amboina) amboinac 
{- P, the longest piunule, with 21 — 24 segments 
g-^ Pj half again as long as Pj or Pg, which are approximately 
equal in length, with 21 segments; 39 — 43 cirrus segments 
(Zanzibar) jozibini 
g" P„ half asain as lonp- as P,, but only slightly longer than 
Pg, which is much larger than Pj ; P„ has 24 segments; 
36 — 39 cirrus segments; a more delicate species than the 
preceding (Zanzibar) gravieri 
e- the longest and stoutest pinnules on the base of the arm have 
from 26 to 30 segments 
f^ not over 16 arms: 32 — 36 cirrus segments; lower pinnules 
strongly carinate ; enlarged proximal pinnules with the second- 
fifth segments strongly carinate 
g^ P, twice as long as P^; Pg much smaller, slightly longer 
tkan Pj (R e d S e a ; ? C e y 1 o n ^) ' . . . ater 
g- P„ slightly longer than Pj; Pg slightly longer than P, 
(Madagascar) niadagascarensis 
l) The specimen from Ceylon described by Reichexsi'ERGEr (Abhandl. der Senck. naturforsch. Ges. vol. 35, 1913, Heft i, 
p. 99) under the name of Craspct/oi/ietra amboinac appears to belong to this species: at any rate it is closely related to it. His specimen 
trom Amboina is undoubtedly N. amboinae. 
