SULCATOll ARENARTUS. 



AMPHIPODA. 



NATATORIA. 



189 



PIIOXIDES. 



SULCATOR ARENA RIUS. 

 Sand Furrow-maker. 



•Specific character. Body not compressed, three posterior segments of the 

 pleon bent under and enclosed beneath the third. AntennPB subequal. Coxae 

 of the pereiopoda largely developed. Basal joint of the three posterior pairs 

 also largely developed ; dactyla wanting, or only represented by stiff spines. 



Length, ^ inch (not including the inflected portion of the pleon). 



Sidcafor arenarius. Spence Bate, Ann. Nat. Hist. vol. xiii. p. 504 (1854) 

 vol. xix. p. 140, 1857. Rep. Brit. Assoc. 1855, p. 58. 

 Trans. Tyneside Nat. Field Club, vol. iv. p. 15, 

 pi. ii. fig. 2, 1858. Cat. Amph. Brit. Mus. p. 112, 

 pi. xviii. GossE, Marine Zool. p. 142, f. 264. 

 White, Hist. Brit. Crust, p. 174. 



Bellia arenaria. Spence Bate, Ann. Nat. Hist. vol. vii. p. 318, 1851. 

 Dana, United States' Explor. Exped. Criist. p. 912. 



The upper portion of the head is projected anteriorly 

 as a flat hood, but has an excavation on each side, cor- 

 responding to the superior pair of antennae, while the 

 centre terminates in a blunt point. Between the antennae 

 the integument also extends into a point, though not so 



