SOUTHWELL ANOMURA 109 



maxillipeds have each a well-developed flagellum. The endopodite of the first 

 maxillse has a recurved flagellum. 



Chelipedes usually similar and equal, or one may be slightly larger than the other. 

 The fingers open and close in a horizontal plane, and their tips are corneous and 

 spooned. The fourth and fifth pair of legs have a patch of thickened corneous 

 granules on the outer surface near the tip. 



No paired appendages in either sex, except those which form the tail fin. 

 Biramous appendages are found, on the left side on segments 2-5 inclusive. 



This genus is a large one and comprises about 53 species. For the most part 

 they inhabit tropical seas, but some extend into temperate waters. About half the 

 number of known species are Indo-Pacific forms, five species occur along the Western 

 Pacific Coast, ten species from the West Indies and neighbouring Atlantic Coasts, 

 and six species from the Coast and Islands of North- West Africa. Some are 

 Mediterranean. They are shallow-water and littoral forms (under 100 fathoms). 



Clibanarius infraspinatus, HILGENDORF (20). 



De Man (24), Ortmami (30), Henderson (18), Nobilli (28). 



Carapace longer than broad, and bearing tufts of yellowish bristles, which 

 are most numerous near the cervical groove, whilst others occur near the lateral 

 borders, and on the calcified anterior part of the carapace. Rostrum very small 

 and barely reaching to the base of the ophthalmic scales. These latter are 

 small, and have their free edges spinose. setose, and approximated. Eye-stalks 

 long, slender and sparsely setose, slightly longer than the auteunal peduncles, and 

 reaching to the middle of the terminal joint of the antennules. Antennal 

 acicle setose and triangular in shape, with spines arranged along the internal edges 

 and overlapping the terminal joint of the peduncle. 



Chelipedes equal, similar, and very massive. 



Upper and inner border of merus serrulate, and scattered vascular tubercles 

 occur on the outer and under surfaces. A strong tooth occurs near the lower and 

 inner border of the merus of the chelipedes. The extensor surface of the wrist, 

 hand and fingers are covered with short stout conical tubercles, many of which 

 bear a tuft of bristles. There is a hiatus between the base of the fingers when 

 closed. The fingers meet terminally in a fiat blackened corneous patch on the 

 extensor surface. They open and close in a horizontal plane. 



The second and third legs are smooth and not tuberculated, their joints are beset 

 with setge, and a few setae occur on their extensor surfaces. The setae are more 

 numerous on the dactyli. 



Colour in formalin, yellowish-brown. 



Eye-stalks and second and third pair of legs bear longitudinal lines of colour. 



