(j 7 2 Caprella linearis. 



the second pair of legs ovate with a tooth near the base. 

 Latr., Gen. Crust, et Ins., i. 59. ; Desm., Crust, 278. — 

 C. scolopendrbides Lam., Anim. s. Vert, v. 174. — Cancer 

 linearis Lin., Syst, 1056. — C. lobatus Stew., Elem., ii. 317. 

 — -Squilla lobata Mull, Zool. Dan. Prod., 197. No. 2359.; 

 Fabr., Faun. Grcenl., 248. No. 225. — S. quadrilobata Mull., 

 Zool. Dan., tab. 56. fig. 4, 5, 6. — Gammarus quadrilobatus 

 Mull. Zool. Dan., tab. 1 14. fig. 11, 12. 



Caprella linearis. 



Hab. — Found among the Confervae on the sea shore at Leith, Stau- 

 a rt; Berwick Bay, among corallines from deep water. 



Body 6 lines long, slender, colourless, pellucid, smooth. Head enlarged, 

 very obtuse in front, contracted posteriorly, spineless : eyes scarlet, round- 

 ish : superior antennae about a third shorter than the body, and the in- 

 ferior about half the length of these, the two basilar joints short, equal, 

 and almost naked, the three outer joints elongate, subequal, and ciliated 

 underneath with long hairs. First pair of legs smaller and shorter than 

 the second, the tarsal joint forming a narrow elliptical hand armed with a 

 stout claw ; the hand of the second pair oval, with a single tooth near its 

 base. Four first segments of the body elongate and equal, the fifth and 

 sixth very short ; and the second pair of legs arise from the bulged 

 front of the first. Branchial processes small, subcylindrical, with a globular 

 protuberance behind them, which, when the animal is gravid, swell out 

 and unite, and, in this way, form a large uterine pouch ; this appears to 

 consist of four valves with fringed margins, which open at the proper 

 season to allow of the escape of the young. Posterior legs sparingly hispid ; 

 the terminal pair very long, projected backwards so as to form a sort of 

 tail; the tarsal joints longer and stouter than the others, with a small 

 tooth near their base, and each of them armed with a long claw. 



2. Pro v to Leach. 



Char. — Body linear-elongate, of 7 subcylindrical segments, 

 the anal short: antennae frontal, 5-jointed, the basilar joint 

 minute, the superior pair longest: eyes placed behind the 

 antennae : palpi 4-jointed, the terminal joint small and claw- 

 like: legs 14, 4-jointed and monodactyle, the two first pairs 

 maniform, the 3 intermediate pairs slender, the two posterior 

 pairs stouter, with a small additional patellar joint. 



1. P. peddtus Fleming,, in Edin. Phil. Journ., viii. 296. — 

 P. pedata Leach, in Edin. Encyc, vii. 433. — P. pedatum 

 Desm., Crust, 376. — Gammarus pedatus Mull., Zool. Dan., 



