108 Memoirs of the Indian Museum. [Vor. IV, 
for among other Stomatopoda in the Indian Museum any two species which show 
very close structural affinity invariably agree in this character. It is not improbable 
that distinct races of P. stylifera exist on the coasts of Australia and America, but this 
cannot be established with any certainty without the examination of large numbers 
of specimens from the two localities. 
The three examples in the Indian Museum are registered as follows :— 
7583 
Disaster Bay, Victoria. .. Australian Museum. .- 206,138, 150 mm. 
720 
10 
Pseudosquilla stylifera has been recorded from Chili (Milne-Edwards, Nicolet, 
Miers), from California (Bigelow, Holmes) from the Hawaiian Is. (Randall), and from 
Newcastle Bight, New South Wales (Whitelegge). It is strange that the species 
has not been found on the New Zealand coast. 
Coquimbo, Chili. .. Berlin Museum. A | tress (oy supine 
Post-larval stages of Pseudosquilla. 
Two small specimens, Ig and 27 mm. in length, belong to what has been termed 
the ‘ monodactyla’ stage of this genus.' Hansen has shown that this form is not a 
‘distinct species, as was supposed by Milne-Edwards and Miers ; but is a ‘ zwischen- 
stadium ’ in the development of members of this genus. In the absence of teeth on the 
raptorial dactylus and of carinae on either side of the median crest of the telson, the 
appearance of these forms is so strikingly dissimilar to that of the adult species that 
the mistake made by the earlier writers is not astonishing. 
Specimens of Pseudosquilla oculata in the ‘ monodactyla’ stage have been recorded 
of lengths varying from 28 to 34 mm., while those of a similar stage of P. ciliata range 
from 16 to 21°3 mm. : 
I am uncertain as to the species to which the two examples in the Indian Museum 
should be referred. It is probable that they belong to P. ciliata since that is the only 
species of Pseudosquilla known from the localities in which they were found. 
It will be noticed that among the recorded specimens of P. ciliata (p. 100 ) are 
two specimens which also measure only Ig and 27 mm. in length. These examples 
possess all the adult characteristics ; but their existence does not necessarily prove 
that the ‘ monodactyla’ of the same size cannot belong to that species, for it is very 
probable that an actual shrinkage in total length may take place at the close of the post- 
larval stages. 
The examples agree closely with the individual, 20 mm. in length, which de Man 
has recorded from Amboina, and differ in the various points which have been men- 
tioned by that author from the description and figures given by Miers. 
The specimens are registered as follows :-— 
9746 
oO 
S. Ceylon, 34 fms., 6° 10’ N., 8r° 16’ E. .. ‘Investigator’. .» 22527 mame 
34 s 
50 
Port Blair, Andaman Is. .. J. Wood-Mason. .. I2, 19mm. 
880, p. 110, pl. iii, figs. 1, 2; de Man, 1887, p. 571, pl. xxii a, fig 6: Hansen, 1895, p. 85; Bigelow, 
1902, p. 156, and Nobili, 1906, p. 336. 
