HANDBOOK TO BRITISH MARINE FAUNA. 251 
postero-lateral spine; branches of rostrum divar- 
icated at extremity; second joint of antenna 
P. tetraodon, Leach, carapace with small tubercles ; 
antero-lateral margin with 4 spines. 2in. Rare, S. 
P. gibbsw, Leach, carapace with large rounded ele- 
vations, but no tubercles, no spines on antero- 
lateral margin. Rare, deep w., S. coast. 
Mata, Lamk. Carapace covered with numerous sharp 
spines; branches of rostrum strongly divaricated ; 
no teeth beneath terminal joint of walking legs. 
M. squinado, Liatr. 10in. long. 8. and 8.W. coasts. 
III. From Tunicata :—Family MoneuLipa2. 
HKueyra, A. & H. Branchial sac with no folds. 
EH. glutinans, Moll., circular area on side free from 
sand. in. Shallow w., gen. distr. 
. globosa, Hane., entirely covered with sand. 4 in. 
PERA, Stimp. Bran. s. with 5 folds each side. 
P. hancocki, Hrdn., matted fibres at posterior end. 
4in. Irish Sea. 20 fms. 
Moueuna, Forb. Bran. s. with 6 or 7 folds each side. 
M. inconspicua, A. & H., 6 folds, sandy, dors. lam. 
entire, no papille on stigmata. 4 inch. 
M. impura, Hel., 6 folds, sandy, small papille on 
edges of stigmata. lin. W. of Ireland, shallow. 
M. simplex, A. & H., few hairs, little or no sand, 6 
folds, anus fringed, dors. tub. horse-shoe, aperture 
to left, 3-%in.— 
M. tubifera, Orst., 6 folds, anus fringed, dors. tub. 
horse-shoe, dors. lam. toothed, sandy. 1 in. HE. 
coast. 
M. ampulloides, v. Ben., 6 folds, anus fringed, dors. 
tub. horse-shoe, 3 bars on fold, dors. lam. entire. 
lin. KE. coast, shallow. 
slender ; last jt. of walking legs toothed beneath. 
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