574 rUOCEEDlNGS OF THE NATIONAL MV!<EVM. vol. xxi. 



24. LIBINIA SETOSA Lockington. 



Llhhita Hetosa Lockinciton, Viae. Cal Acad. Sci., July 17, 1S76, 1S77, VII, p. 08. 



M:in(l;ilen;i IJjiy, 12 to 51 fiithoius, and off Abreqjos Point, Lower 

 Calilorniii, 5A fatlioiiis, stations 2831, 2832, 28;j;{, and 2835. 



All the spocimons are young. The four branchial spines forniing a 

 rhomboid are rather h)ng-, as are also three of tlie inedian s])ines, 

 namely, the jmstorior of the gastric S])incs, the anterior cardiac and 

 intestinal. The ])osterior gastric spine of adults is wanting in the 

 young and the tubercle on cither side of the anterior cardiac spine is 

 much reduced. 



15. LIBINIA SPINOSA Gu6rin. 



Lilniiia npinosa (Jukhin, Icon. K. Aiiiiu., Cni.st., pi. ix, fig. 3 — Milne-Edwauds, 

 Hist. Nat. Crust., IHHl. I, p. 301. 



Oil" the Uio de la Plata, U).\ fathoms, station 2700. 



26. LIBINIA COCCINEA (Dana). 



Libidovlcd covciiica Dana, Anier. .lour. Sci., 1851, 2cl ser., XI, ]>. '_'(>S; CruHt. II. S. 



Expl. Expod., lHr>2, I, p. 88; 1855, pi. i, (ig. :}. 

 TAbhiia coctinea M1KK8, Cliiillonjjor Roj»t., Zool., 1880, XVll, ]>, 73. 



OirChilf of San Matias, Argentina, 52 fathoms, station 2767. 



27. LIBINIA SMITHII Miers. 



Libhiia aiiiilhii Mucus, ChaJlenfjcv Kept., Zool., 188(>, XVII, p. 71?, pi. ix, fig. 1. 

 JJhiiiia halini A. Mii.nk-Kdwakd.s, Mihs. Soi.Cap Horn, 18!tl, VI, (Jrust , ]».."), ])1 

 I, (igs. 1-0. 

 Magellan Strait, 301) fathoms, and off Magallanes Territory, Chile, (51 

 to 1,050 fathoms, stations 2780, 2783, 2781, 2787, and 2788. 



28. LISSA TUBEROSA, new species. 

 (I'lato XLl, lig.S.) 



Branchial region with tiro larfie protnhcranccs; postlateral mnrf/in 

 sinuous; tico crests on the carpal joints of the amhnlatonj letjs. 



Carapace with two median tuberculated i)rominences, the gastric 

 higher than the cardiac, the latter continued backward along the median 

 line to the i)osterior margin. A ridge running obli(iuely backward from 

 the gastric ])r()minen('e is almost (entirely occupieil by two protuberances, 

 one at its middle and one at the i)Oster() lateral angle of the carapace, 

 which presents a rounded or obliciuely truncate outline. The sinus of 

 thepostero lateral margin is more shallow than in L. hicarinata Aurivil- 

 lius. Margin of hepatic region with a tubercle; of bran(;iiial region 

 with several tubercles and a blunt tooth at its middle. Hepatic region 

 nearly vertical. Front with a shallow median emargination, from which 

 the margin slopes obliipioly backward or is almost transverse; outer 

 corners with a slight tooth, most i)roduced in young si)ecimeus. I're- 

 orbital tooth subacute or obtuse. 



