126 Carcinological Fauna of India. 
the 6th pair of abdominal appendages—is intercalated between the 
6th and 7th somites. 
The gill-plumes vary in number from 20 to 14 on either side, and 
are either trichobranchie or phyllobranchie. 
Many of the species are protected by a commensal Sponge or 
Ascidian, or by an empty valve of a Lamellibranch shell, carried over 
the back. 
Tribe II. Homoutpea. lS Vo¥ 
Homoliens (part), Milne Edwards, Hist. Nat. Crust. IT. 180. 
Homolidx, Henderson, Challenger Anomura, p. 18: Ortmann in Bronn’s Thier 
Reich, V. ii., Arthropoda, p. 1155. 
Carapace longer than broad: linea anomurica, usually present.* 
The eyes are not retractile into orbits, nor the antennules into pits. 
Basal antennulary joint subglobular. 
The eye-stalks each consist of two movable joints, a slender con- 
spicuous basal joint which is sometimes of great length, and a stout 
terminal joint that carries the eye. The antennal flagella are, except 
in the Latreillidx, much longer than the carapace. 
The interantennulary septum is a distinct vertical process, and is 
not formed merely by the close apposition of the apex of the epistome 
to the front. 
The front forms a slender triangular prominent rostrum which 
may be bifid at tip, and often has a spine on either side of its base. 
The division between the epistome and palate is distinct, but the 
vault of the palate is shallow. 
External maxillipeds pediform or sub-operculiform. 
The chelipeds and legs are long and slender: the fingers are not 
channelled en cuillére. Only the last pair of legs is dorsal and reduced 
in size. 
Sternum of the female broad, without any special longitudinal 
grooves. 
The abdomen of the male, and usually but not always of the female 
also, consists of seven separate segments. There are no lateral platelets 
intercalated between the 6th and 7th segments. 
The gills are phyllobranchiaz, and the gill-plumes vary in number 
from 14 to 8 on either side. 
* The linea anomurica is a curious suture-line running fore and aft on either side 
from the posterior border of the carapace to the inner side of the antennal spine. 
For its homologue among the nearer relatives of the Homolidea we have to go to 
certain species of Peneus, 
576 
