and Uttle-hnown Amj^hipodous Crustacea. 447 



brandies of the penultimate pair, which are much shorter than 

 either of the other pairs, are unequal. The ultimate and ante- 

 penultimate pairs have the peduncle longer than the branches ; 

 the branches subequal. While the pereion is stout, the pleon 

 is narrow and elongated. The colour is tawny, with some 

 red spots chiefly on the large coxge. 



The generic name refers to the beauty of the denticulate 

 membranaceous thighs ; the specific name to the peculiarity 

 of the finger of the second gnathopods. 



Exunguia stilipes^ Norman, and Cratippus tenuipes^ Spence 



Bate. 



The genus Cratippus and the species Cratippus tenuipes were 

 founded by Mr. Spence Bate on a single specimen, and that 

 apparently an abnormal or imperfect one. The type specimen, 

 such as it was, has been unfortunately mislaid or lost. It thus 

 becomes impossible absolutely to decide whether the genus 

 Exunguia (Norman) is or is not identical with Cratip2yus, unless 

 fresh specimens of the latter should happen to be found agree- 

 ing with the original description. Exunguia stUipeswsLS de- 

 scribed in this Journal (ser. 4, vol. iii. p. 359) by the Rev. A. 

 M. Norman, with that writer's usual clearness and accuracy. 

 Specimens minutely agreeing with his description may be 

 obtained at Meadfoot and at Anstis' Cove, Torquay, by a care- 

 ful examination of the sponge Halichondria panicea^ which in 

 many places coats the rocks beneath overhanging seaweeds. 

 The sponge should be broken into small pieces, when now and 

 then a little white glistening line, about an eighth of an inch 

 long, will reward the searcher with the desired object. A 

 person of sharp sight may notice that the white line is orna- 

 mented by a pair of red eyes. 



Accompanying Mr. Norman's description above referred to 

 are figures of certain portions of the animal — one especially 

 deserving of attention, which shows the microscopic serrula- 

 tion of the branches of the uropoda. It does not appear, how- 

 ever, that any figure of the whole animal has hitherto been 

 published. In regard to the lower antennse, I may notice 

 that the underpide is flattened and that the outer edges are 

 minutely serrulate. The flagella of both pairs of antennse 

 have some rather long fine hairs projecting from them. The 

 eyes are round ; the faceting over the red pigment is white. 

 Under the rostrum of the head there is a projecting triangular 

 plate, beneath which are packed the maxillipeds. The meta- 

 carpus of the first gnathopods is stouter than the wrist and 

 hand. The antepenultimate uropods are folded under the 



