232 Transactions. — Zoology. 



2. A. exiguus, Stimpson. 



PI. XVIII., fig. 2. 



This species is most imperfectly described in the Brit. Mus. Cat., p. 75, 

 so that it is not easy to identify, as even the figure — unless accompanied by 

 drawings of separate parts — is not complete enough in its detail. The 

 following is all the description given: — " Pleon having the third segment 

 tumid posteriorly, and curved down towards the fourth ; the posterior 

 margin deeply concave ; the infero -posterior angle produced and directed 

 upwards ; fourth segment having a deep dorsal sinus. Pereiopoda having 

 the dactylos long and slender ; basos of the three posterior margins deeply 

 serrated along the posterior margin." 



To which I add the following as descriptive of specimens obtained by 

 me : — Eyes very inconspicuous. Superior antennae with a 5-jointed flagel- 

 lum; secondary appendage 3-jointed, half as long as the flagellum. Inferior 

 antennte twice as long as superior. Mandibles with rows of strong teeth on 

 the cutting edge. First gnathopoda having the carpus and propodos sub- 

 equal, the latter slightly ciliated, and with a well-defined palm. Second 

 gnathopoda having the propodos shorter than the carpus, oval, densely 

 ciliated, destitute of a palm, and having a very small dactylos. Third 

 pereiopoda the shortest ; fifth pair with broad basa. Length, 0-25 inch. 



Hah. Dredged in Paterson Inlet, in 8 fathoms. 



The type specimens were obtained by Stimpson " on sandy bottoms in 

 8-15 fathoms " off the east coast of North America. 



Sub-fam. Phoxides. 

 Genus Phoxus, Kroyer. 



Superior antennae with a secondary appendage, inferior pair as long as 

 the superior. Mandibles with an appendage. Maxillipeds subpediform. 

 Both pairs of gnathopoda subchelate. Cox® deeper thon the respective 

 segments. Posterior pair of pereiopoda shorter than the precedmg. Telson 

 double.* 



1. P. batei, W. A. Haswell (Proc. Linn. Soc. N.S.W., vol. iv., p. 259). 



Cephalon produced into a long obtuse hood, extending almost to the end 

 of the peduncle of the superior antennae. Eyes ovate-reniform, black, con- 

 spicuous. Antennae short : flagellum of superior pair longer than the 

 base ; secondary appendage about two-thirds as long as flagellum : inferior 

 pair rather exceeding the superior ; peduncle much exceeding the flagellum, 

 joints flattened, bearmg numerous short obtuse spines on their upper sur- 

 face, and long setae on their outer margins. Gnathopoda subequal and 



* In the generic character given in the Brit. Mus. Cat., p. 97, it is said :— " Eyes not 

 appreciable," a footnote pointing out that the diagnosis is doubtful. In some of my 

 specimens the eyes had lost most or all of their pigment, but in others they were very 

 black. 



