48 Memoirs of the Indian Museum. [Vor. IV, 
var. dentata ; another is on one side typical and on the other of the dentata form. The 
differences do not, in my opinion, deserve the distinction of a varietal name. 
In spirit specimens light chestnut brown colouration defines all the carinae of the 
carapace and the submedian and intermediate carinae of the abdomen. There are also 
in some specimens rather conspicuous brown markings on each of the abdominal somites 
between the intermediate and lateral carinae. On either side of the median carina of 
the telson there is a large and conspicuous, oval, chestnut brown spot: the two are 
confluent posteriorly beneath the base of the distal spine. 
There are five specimens in the Indian Museum, registered as follows :— 
2514-5 r °) Soe t NT , ” c 
SO | ON. W. of ( 13°47'5" N., 93°10'25" E. 185 fms. ) 
mnts-8 Andamans. | 14°13” N., 93°40’ E. 370—419 fms. 
9 
“Investigator.” 24,29, 68—131 mm. 
S. of Port Blair, Andamans. 188—220 fms., ‘Investigator.’ 192,89 mm. 
11°31’40” N., 92°46’40” E. 
S. leptosquilla has also been recorded from the Celebes sea near the Philippine Is., 
115 fathoms (Brooks), and from the vicinity of the Nicobars, 296 metres {Jurich). 
15 Squilla tenuispinis, Wood-Mason. 
Plate III, figs. 32—34. 
1891. Sguilla tenuispinis, Wood-Mason, Ann. Mag. Nat. Hist. (6), VII, p. 271. 
1894. Squilla tenuispinis, Alcock, Ann. Mag. Nat. Hist. (6), XIII, p. 409. 
This species is very closely allied to S. leptosquilla, but may be distinguished from 
it by the following characters :— 
1. The dorsal surfaces of the carapace and abdomen are smooth, polished and 
without trace of rugosity. 
_ The median carina of the carapace is obsolete and is entirely absent in front 
of the small dorsal pit (fig. 32). 
_ The intermediate carinae of the carapace are completely absent and the laterals 
are only visible in the extreme posterior part of the carapace (fig. 32'). 
4. The rostrum only reaches to three-quarters the length of the antennular somite. 
It is broader than long, bluntly rounded anteriorly, and shows only the faintest 
indications of a median carina. 
5. The eyestalks are rather more swollen. 
6. The lateral process of the fifth thoracic somite trends obliquely forwards. 
7. The telson is rather broader and the mid-dorsal carina is much less elevated 
(figs. 33, 34). 
No 
t 
WwW 
Several male specimens of comparatively large size were examined, but the margins 
of the telson are not nearly as strongly swollen as in large S. /eptosquilla of the same 
| The figure is erroneous in showing intermediate carinae on the carapace. Anterior to the cervical 
groove the regions external to the gastric grooves are evenly rounded; only at the extreme posterior end 
of the indicated carina is there the faintest trace of a keel. ‘The median carina, also, does not extend 
as far forwards as is shown. 
