Memoirs of the Indian Museum. 
A, Lateral margin of fifth thoracic somite, seen in dorsal view, composed 
ofa 
single process, spinous or subacute. 
I. Cornea of eyes very small, its breadth less than greatest breadth 
II. Cornea of eyes small or large, its breadth always greater than 
of stalk. 
A. First five abdominal somites with faint but distinct sub- 
median carinae. 
I. Mandibular palp present; telson with numerous granular 
tidges or scattered tubercles on either side of median 
crest. 
A. Lateral process of fifth thoracic somite directed 
outwards, those of two succeeding somites an- 
teriorly rounded; inferior surface of telson smooth 
on either side of post-anal carina 
B. Yateral process of fifth thoracic somite bent Eee 
liquely forwards, those of two succeeding somites 
acutely pointed anteriorly ; inferior surface of telson 
usually with tubercles or granular ridges on either 
side of post-anal carina .. 
IT. Mandibular palp absent; telson without dosed ‘ee 
cles: in adult male with a pair of huge smooth curved 
ridges terminating on intermediate marginal teeth 
B. First five abdominal somites without trace of submedian 
carinae. 
I. Antero-lateral angles of carapace sharply spinous. 
A. Breadth of cornea about one-third of total length of 
eye; lateral process of fifth thoracic somite short 
B. Breadth of cornea about one-half of total length of 
eye; lateral process of fifth thoracic somite long... 
II. Antero-lateral angles of carapace rounded 
greatest breadth of stalk. 
A. Numerous sharp longitudinal carinae on either side of median 
crest of telson. 
I. Antero-lateral angles of carapace spiuous; raptorial 
dactylus with six teeth'; no submedian carinae on 
first five abdominal somites .. or at 
II. Antero-lateral angles of carapace not spinous; raptorial 
dactylus with four teeth!; submedian carinae on all 
abdominal somites He 40 ‘ 
B. No longitudinal carinae on either side of median crest of telson. 
I. Raptorial dactylus with more than four teeth!; telson 
with short (normal) marginal teeth. 
4, Median carina of carapace, when present, not bifur- 
cated anteriorly. 
I. Median carina of carapace absent; mandibular 
palp present; raptorial dactylus with six 
teeth!; lateral processes of sixth and seventh 
thoracic somites posteriorly rounded. 
. Submedian carinae absent from at least first 
[Vor,. IV, 
- latreiilet, p. 24. 
. decorata, p. 27. 
. gubba, p. 28. 
microphthalma, p. 31. 
chlorida, p. 33. 
. rvotundicauda, p. 33. 
fasctata, p. 34. 
. miles, p. 36. 
: Including the terminal tooth 
