254 Btdletin Vanderbilt Marine Museum, Vol. VII 



both lateral margins are produced to a strong keel and there is 

 also a strong median longitudinal keel extending from the median 

 proximal area to the base of the fixed finger; the lower inner 

 and outer ridges are thicker than the upper one; the first three 

 each bear a double longitudinal series of coarse, acuminate, for- 

 ward-directed spines, while the upper median ridge usually bears 

 only a single series of these spines. The areas of the palm be- 

 tween these ridges form wide channels, the two on the upper 

 face being clothed on with a fine short pilosity, this also being 

 continued on the proximal three-fifths of the hinged finger and 

 on seven-eighths of the fixed finger. The fingers are about four- 

 fifths as long as the palm, the fixed finger being much the thicker, 

 having the outer margin convex distally, the apex incurved, acu- 

 minate, projecting slightly beyond that of the hinged finger. 

 The cutting edges of the two figures are furnished with numerous 

 large molars, of unequal sizes, interspersed with small teeth, as 

 shown in plate 101. 



References : Cancer norvegicus, Linne, C. von, Syst. Nat. ed. 

 XII, 1766, p. 1058. 



Astacus norvegicus. Pennant, T., British Zool., 1777, vol. IV, 

 p. 23, pi. 13, fig. 1. 



Nephrops norvegicus, Leach, T., Edinb. Encycl. 18, vol. VII, p. 

 400.— Bell, T., Hist. Brit. Stalk-eyed Crust., 1853, p. 251, 

 figure, also early synonymy. — Stephenson, K., Kjobenhavn 

 Naturh. Foren. Vednsk. Meddel. 1907-09, p. 279, numerous 

 Scandinavian references). — Selbie, C. M., Fish. Ireland, 

 Sci. Invest. 1914, pt. I, Decapoda Reptantia, p. 47 (refer- 

 ences).— Nobre, A., Crust. Decapode Stomat. Marinhos de 

 Portugal, Inst, de Zool. da Univ. do Porto, 1931, p. 242, fig. 

 136 (with Portuguese distribution and most extensive syn- 

 onymy) . 



Family: PENAEIDAE 



Genus: PENEUS Fabricius 

 Peneus merguiensis de Man 



Volume VI, plate 24 

 Material examined: Two specimens, taken in 25 fathoms, 

 seven miles northeast of Corregidor Island, Manila Bay, Philip- 

 pine Islands, June 12, 1929, by the "Ara" World Cruise. 



