BY WILLIAM A. HASWELL, M.A., B.SC. 101 



antennse, and the absence of a spine on the last segment of the 

 pereion, besides other minor points. 



EUSIRUS AFFINIS. N. Sp. 



(Plate XI Y., figs. 2-4). 



The second and third segments of the pleon are each armed 

 with a few minnte spines in the middle of the posterior border ; 

 the following three have each a very small mesial tooth. The 

 superior antennae are as long as the head and first four segments ; 

 the first joint of the peduncle is as long as the head, stout ; the 

 second joint is about half the length of the first and narrower ; 

 the third is very small ; the fiagellum is nearly twice as long as 

 the peduncle, with 22 articuli ; the appendage is well developed, 

 nearly half the length of the fiagellum, with fourteen articuli. 

 The inferior antennae are considerably longer than the superior 

 pair, being as long as the head and the first six segments of the 

 pereion ; the peduncle is stout, the fifth joint rather longer than 

 the fourth, but scarcely so thick ; the fiagellum is tolerably stout, 

 a little longer than the last joint of the peduncle, of more than 

 twenty-two articuli. The gnathopods and pereiopods are similar 

 to those of Eusirus duhius. 



The length is 2oths of an inch. 



Port Stephens. 



IX. Leucothoe spinicarpa. 



Miers (Crust, of "Alert," p. 313), following Boeck, identifies L. 

 articulosa with L. spinicarpa, and regards L. commensalis as a 

 variety of that species. L. gracilis and L. dienienenis are to be 

 regarded as marked varieties of the same. 



X. Atylus homochir. N". s. 



(Plate XIII., figs. 5-7) 



The cephalon is produced into a well-developed rostrum. The 

 whole of the body is dorsally carinated, but in none of the segments 



