88 STALK- AND SESSILE-EYED CRUSTACEA 
r Order II. STOMAPODA. 
Stomapoda, Latr. Fam. Nat. p. 282, (1825). 
Stomapodes, M. Edw. Hist. Nat. Crust. i, p. 235, (1834). 
Anomobranchiata v. Stomapoda, Dana, U.S. Explor. Exped. xii, 
Crust. part. i, p. 8, (1852). . 
Branchie not enclosed beneath the carapace, but pendent from the 
base of the thoracic legs, or at the base of the abdominal appendages, 
or entirely wanting. (The first two and sometimes all three pairs of 
maxillipeds are pediform. The legs are usually palpigerous, one or two 
of the posterior pairs are often wanting. The abdominal appendages 
are often obsolete). 
Family I. SQUILLIDA. 
Squilliens, M. Edw. Hist. Nat. Crust. ii, p. 509, (1837). 
Squillide, Dana, U.S. Explor. Exped. xiii, Crust. part i, p. 615, 
(1852). 
Carapace nearly quadrilateral, with two longitudinal grooves above, 
and leaving exposed the two first segments of the head and several 
segments of the body. Frontal plate mobile, and separated by a 
suture from the carapace. Internal antenne with three flagella. 
External antenne short, bearmg a large oval, often foliaceous 
scale. Second pair of maxilipeds very greatly developed and pre- 
hensile, with the inferior margin of the last two joints usually armed 
with spines. Three first pairs of thoracic legs shorter, prehensile, 
appled to the buccal cavity, with the penultimate joint expanded ; 
the succeeding pairs slender. Abdomen very large, with largely 
developed branchial appendages. The terminal segment and appen- 
dages to the penultimate segment greatly developed. 
SQUILLA. 
Squila, Fabr. (part) Ent. Syst. Suppl. p. 511, (1798); M. Edw. 
Hist. Nat. Crust. ii, p. 517, (1837); Dana, U.S. Explor. Exped. xiii, 
Crust. part 1, p. 615, (1852). 
Body compactly articulated. Carapace very short, narrower in 
front, often costate, leaving nearly five posterior segments of the abdo- 
men exposed. Abdomen longitudinally costate above, its caudal 
