Manchester Memoirs, Vol. Ixv. (192 1), No. 11 7 



be retained at the end of the leg, since that is still in constant 

 contact with external objects. The first pair of legs is of the 

 form which that limb has in the Palaemonidae generally, and 

 its hairy chela is no doubt used in the ordinary way for 

 cleaningthe body and limbs. The second pair are equal and 

 alike. Their chelae are somewhat reminiscent of the large 

 chela of an Alphaeid. They have a very large, oblong 

 " hand," compressed in the near half, but a little widened and 

 oddly depressed at the base of the fingers, which are short. 

 The moveable ringer is a very clumsy, blunt hook, biting along 

 and across a still smaller fixed finger, which is shaped 

 like the prow of a boat, with sharp edges and point, and bears 

 a number of soft hairs on its sides. What use the animal 

 can make of these rather remarkable organs it would be 

 unprofitable to attempt to guess. The walking legs end in 

 small, simple, sharp-pointed, curved dactylopodites. As 

 usual, they differ somewhat in their proportions, the hinder 

 pair being the most slender. 



The gill-formula is that of Conchodytes — a row of five 

 pleurobranchs above the legs of each side — though a few 

 minute folds in the position of the pleurobranch of the 

 third maxilliped probably represent that gill. Thus here, as 

 in the Pontoniinae, a reduction of the gill apparatus accom- 

 panies a sedentary life. The abdominal limbs of the first five 

 pairs are large, and are borne each at the end of a ridge which 

 runs outwards across the underside of the pleuron. The 

 basipodite is long and flat, and in the fifth pair, which is 

 shorter than those before it, is widened, and probably 

 strengthens the hinder part of the brood-pouch. In the first 

 pair the endopodite is very small ; in the others endopodite 

 and exopodite are sub-equal, pointed, fringed plates. An 

 appendix interna, with the hooked spines well developed, is 

 borne on the endopodite in the second to fifth pairs, as in 

 Palaemonidae and Gnathopbyllidae. It seems probable that 

 these broad and well-formed limbs serve, not only to carry the 

 eggs, but also to maintain, or from time to time to reinforce, 

 the current in the gall ; as in a resting Leander they are used 

 to renew the water below the body. The uropods are well- 

 developed and resemble those of the Pontoniinae. 



I am unfortunately compelled by an accident, which cost 

 me the loss of the telson of my specimen as well as of one of 

 its maxillules, to describe this organ from memory, aided by 

 some rough notes and an even rougher sketch. It is broad 

 and sub-triangular with convex sides and rounded end. The 



