1926] Schmitt, Crustaceans Collected by the Congo Expedition od 
possibly but one principal row, maybe two. The spinulation of this 
margin though mentioned in the original description of M. lenzii (de 
~ Man, loc. cit., 1911, p. 230) is not again referred to in the remarks on 
lenzit under M. dux (de Man, loc. cit., 1912, p. 3). Asin the largest speci- 
men the second rostral tooth is just behind, nearly over, the orbital mar- 
gin; other than this, and the fact that the antennal scale is more like 
that of MM. dux as figured by de Man (loc. cit., 1912, Pl. rv, fig. 5a), there is 
much resemblance to the variety congoensis. 
The number of rostral teeth varies from 44°; usually there are 
seven or eight teeth above, and three or four below; one or two of the 
dorsal teeth are on the carapace, and often the most anterior is subapical; 
very rarely are two placed so close to the tip as to warrant being desig- 
nated as subapical. 
The collectors of this comprehensive series of specimens, Messrs. 
Lang and Chapin, entered the following note upon the label of the 
December, 1913, Avakubi specimens: “Color, dark greenish-gray, 
blackish on large claws, becoming bluish on tail. Common in brooks.”’ 
“This large shrimp, which is about 4% inches long over all, is one 
of those commonly brought to the government stations by the natives. 
It is generally caught in the smaller forest streams after they have been 
dammed up as described above (cf. p. 3).”” (H. L.) 
Macrobrachium vollenhovenii (Herklots) 
Plates VI, Figure 2; VIT 
Palemon vollenhovenit Herxuots, 1858, Tijds. Entom., Nederl. Entomol. 
Vereen., I, p. 96. Dr Man, 1879, Notes Leyden Mus., I, p. 178. 
Palemon jamaicensis Osorio, 1892, Jorn. Sci. Nat. Lisboa, (2) IT, p. 200. 
Palzemon jamaicensis ? Brenepict, 1894, Proc. U. S. Nat. Mus., XVI, (1893), 
p. 540. 
Palemon jamaicensis var. vollenhovent AuRIvILLivs, 1898, Bihang K. Sv. Vet.- 
Akad. Handl., Stockholm, XXIV, Afd. IV, No. 1, p. 16, Pl. m1, figs. 1-5. 
Bithynis jamaicensis vollenhoventi Rarasun, 1900, Proc. U. 8. Nat. Mus., 
XXII, p. 315. Senpier, 1912, Jahrb. Nassauischen Ver. Naturk., Wiesbaden, 
Jahrg. LXV, p. 206. 
Palemon (Macrobrachium) jamaicensis var. vollenhoventt Prarse, 1911, Thir- 
teenth Rept. Michigan Acad. Sci., p. 135. 
Palemon (Parapalemon) vollenhoventi pp Man, 1912, Ann. Soc. Roy. Zool. 
Malacol. Belgique, XLVI, (1911), p. 232. 
Palzemon (Macrobrachium) jamaicensis var. herklotsii DE Man, 1912, Ann. Soc. 
Roy. Zool. Malacol. Belgique, XLVI, (1911), p. 239. 
Recorded from Liberia (Rathbun, de Man); coast of Guinea (de Man); Came- 
roon (Aurivillius, Pearse, Sendler); St. Thomas (Osorio); Congo coast (de Man); 
Benguela (Osorio, de Man). 
