NO. 3668 CRUSTACEA—TIRMIZI AND MANNING ou 
intermediates unarmed; submedian carinae present on abdomen; 
abdominal carinae spined as follows: submedian 6, intermediate 
5-6, lateral 5-6, marginal 2-5; telson broader than long, with 8 pairs 
of marginal teeth, submedians fixed, prelateral lobes present, denticles 
large, rounded, 2, 3-4, 1; postanal keel absent; outer margin of 
uropodal exopod with 7 short, movable spines; lobe on outer margin 
of inner spine of basal prolongation of uropod large, rounded. 
Cotor.—Lateral process of fifth thoracic somite with large, well- 
marked black spot; last 3 thoracic and all abdominal somites with 
dark posterior line; second abdominal somite with rectangular dorsal 
patch of dark color; proximal segment of uropodal exopod with dark 
spot. 
Discusston.—Living or freshly caught specimens of C. scorpio can 
immediately be recognized by the presence of the black spot at the 
base of the lateral process of the fifth thoracic somite; the spots can 
persist for many years in preservative. Cloridopsis immaculata, which 
is discussed below, lacks these black spots and exhibits other differ- 
ences as well. 
One of the specimens has only three intermediate denticles on one 
side of the margin of the telson although there is an indication of a 
fourth denticle appressed to the outer margin of the submedian tooth. 
Kemp (1913) reported three to six intermediate denticles in his 
material. 
Distripution.—Indo-West Pacific region, throughout the Indian 
Ocean into the western Pacific. Both Kemp (1913) and Baig (1954) 
have reported the species from Karachi. 
14. Cloridopsis immaculata (Kemp, 1913) 
Figures 14f, g 
Squilla scorpio var. immaculata Kemp, 1913, p. 45, pl. 2 (fig. 31). 
Matrriau.—1 fragmented 9, CL 16.5 mm; off Karachi; University of Karachi. 
Discussion.—This specimen is so fragmented that it is not possible 
to prepare a description, but from what we can see of the specimen 
it agrees well with Kemp’s account. Kemp treated this species as a 
“variety” of Squilla scorpio, but there seems to be no good reason 
not to recognize it as a distinct species. Both species are distinct 
throughout their range. 
Cloridopsis immaculata differs from C. scorpio as follows: (1) the 
rostral plate is longer and has a broader apex; (2) the median and 
lateral carinae of the carapace are more distinct; (3) the lateral 
processes of the sixth and seventh thoracic somites are slightly more 
upturned; and (4) the lateral process of the fifth thoracic somite is 
never marked with a conspicuous black spot. 
