166 



neai'ly 3 times as long as the 3rcl, flagelliim a little longer than the peduncle 

 and composed of about 7 articulations; those in male considerably lunger, and 

 reaching beyond the peduncle of the inferior ones. The latter in female not 

 very elongated, scarcely exceeding half the lengtli of the body, the 2 last 

 joints of the peduncle nearly equal-sized; those of male about the length of 

 the body. Anterior gnathopoda not very strong, propodos a little shorter 

 than the car2)us, and oblong oval in form; posterior ones very slender, with 

 the propodos sublinear and not attaining half the length of the carpus. 

 Dactylus of the anterior jiairs of pereiojioda extremely slender, exceeding in 

 length tlie 2 preceding joints combined. Last pair of pereiopoda with the 

 basal joint longer than the remaining part of the leg, posterior expansion 

 obliquely truncated at the tip, and reaching beyond the ischial joint, the lat- 

 ter rather stout, with a transverse series of spinules at tlie end anteriorly, 

 meral joint very small, and strongly constricted at the base, propodal joint 

 scarcely longer tlian the 2 preceding joints combined, dactylus of about same 

 length as the propodos. La.st pair of uropoda with the rami about twice as 

 long as the basal part, in female onl}^ fringed with short simple bristles, in 

 male provided on their opposite edges with finely ciliated setae. Telson about 

 twice as long as broad, ti]) blunted, each of the terminal lobes having a row 

 of dorsal denticles, and besides, in female, about 5 marginal spinules in their 

 outer iialf. Body whitish, pellucid, with orange-coloured intestine shining 

 through the integuments, tlie latter mottled with light yellowish and a few 

 reddish patches; ova in the marsupial pouch rose-coloured. Length of adult 

 female 10 mm, of male about the same. 



BemarJcg. — Tliere cannot, I lielieve, be any doubt, that the above 

 described species is that originally characterised by Sp. Bate as Tetromatiis 

 tjipicus, and sul^sequently, by the same author, erroneously identified with 

 Ampelisca Gaimardii of Kroyer. The specimen figured by Sp. Bate, is un- 

 questionably a male, and stime of the characteristics assigned to this species are 

 therefore merely of sexual nature. Whether the form named by Bruzelius as 

 A. rarinata is the male of this or the succeeding species, would seem to be 

 somewhat (luestionable. Lideed, Boeck seems, under the name A. typica, to 

 have confounded male specimens of ))otli s])ecies. The form under question 

 may Ije easily known from its nearest ally, A. fenuicornis, by the compara- 

 tively short inferior antennae in the female, and by the form of the dorsal 

 carina of the 1st segment of urosome, as also by the nearly transversely 

 truncated frontal part of the cephalon. 



Occurrence. — Though nowhere in any great abundance, I have met 

 with this species in several localities, both off the south and west coast of 



