‘ 
56 Memoirs of the Indian Museum. [Vor. IV, 
there is a prominent lobe on the external aspect of the eyestalk. The corneal 
and peduncular axes are very oblique. 
3. The antero-lateral angles of the carapace are produced as acute points which 
project outwards and downwards, scarcely reaching at all forwards beyond 
the adjacent anterior margin. 
4. The lateral processes of the fifth thoracic somite consist of a sharp and very 
slender anterior spine, which is oblique but is not strongly curved forwards 
as in most allied species, and a very short acute posterior process. ‘The ante- 
rior process of the sixth somite has the form of a very small acute lobe which 
at its base is not more than one-fifth the width of the broad but acute posterior 
process. The seventh somite is not bilobed laterally but is angled acutely 
behind and rectangularly in front (fig. 45). 
For the rest the principal characters of the species are as follows :— 
The whole surface of the carapace and abdomen is smooth, highly polished and 
without trace of punctuation. The carapace is broad*anteriorly ; its breadth mea- 
sured behind the antero-lateral angles greatly exceeds half its length, including the ros- 
trum. ‘The median carina is entirely absent in front of the small dorsal pit but other- 
wise resembles that of S. guinguedentata. ‘The lateral and intermediate carinae are well 
marked. ‘The rostrum is broader than long and its upturned lateral margins converge 
to a broad, evenly rounded apex. The anterior margin of the ophthalmic somite is 
sharply pointed between the base of the eyestalks. The antennular peduncle is about 
as long as the carapace. 
The outer inferior margin of the merus of the raptorial claw (fig. 46) is distally 
rounded. ‘The dorsal carina of the carpus is high and terminates in a strong lobe-like 
tooth behind which a minute tubercle is visible. The dactylus, as in the two preced- 
ing species, possesses five teeth including the apical one ; the outer margin is very feebly 
sinuous and is produced almost rectangularly near its articulation with the propodus 
(fig. 46). 
The submedian carinae are rather faint on the abdomen and on the free thoracic 
somites are semi-obsolete. The intermediate carinae are distinct on the thoracic and 
abdominal somites. ‘The following abdominal carinae end in spines :— 
Carinae. Abdominal somites. 
Submedian af xe ak 5,6 
Intermediate J an Bc 2B AR St On 
Lateral .. ae ve ih, hgt® Brea ese. 
Marginal $e Ae ae ne es ik: als 
The telson is almost precisely similar to that of S. guinquedentata, but the teeth 
are rather longer and the intermediate pair, in the type specimen, are not inturned. 
There are three or four submedian denticles, eight intermediate and one lateral (fig. 47). 
All the median parts of the carapace, abdomen and telson are covered with very 
small grey chromatophores. These are not sufficiently crowded to detract from the 
general yellowish appearance of the spirit specimen, but are closely aggregated and 
form faint transverse lines at the posterior margins of the abdominal and last three 
