NO- 3"o PANDARIDAE — CRESSET 39 



3. Posterior corners of genital segment not greath^ produced and rounded, ferox 

 Posterior corners of genital segment greatly produced and truncated. 



discrepans 

 Dinemoura producta (Miiller, 1785) 



Figures 190, 191 



C aligns productus Miiller, 1785, p. 132. 



Dinemoura product.— Latreille, 1829, p. 197.— Kr0yer, 1837, p. 202.— Scott, T., 

 1901, p. 124.— Scott, T., and Scott, A., 1913, p. 86.— Norman and Scott, T., 

 1906, p. 211.— Norman and Brady, 1910, p. 404.— Page, 1923, p. 281.— 

 Pesta, 1934. p. 27. — Oorde and Schuurmana Stekhoven, 1936, p. 139. — 

 Matthews and Parker, 1950, p. 568.— Barnard, 1955, p. 262.— Delamare- 

 Deboutteville and Nunes-Ruivo, 1958, p. 223. 



Binoculus productus. — Nordman, 1832, p. 38. 



Dinematura gracilis Burmeister, 1833, p. 284. 



Dinematura producta.— Burmeister, 1833, p. 331.— Steenstrup and Liitken, 1861, 

 p. 370.— Norman, 1868, p. 301.— Bassett-Smith, 1899, p. 463.— Scott, T.' 

 1900, p. 156.— Brian, 1906, p. 52; 1911, p. 197; 1944, p. 202.— Wilson, 1907' 

 p. 380; 1923, p. 8; 1932, p. 431.— Hansen, 1923, p. 35.— Scott, A., 1929^ 

 p. 95— Pesta, 1934, p. 27.— Heegaard, 1943b, p. 26; 1945, p. 15.— Delamare- 

 Deboutteville, 1948, p. 446.— Matthews and Parker, 1950, p. 568.— Rose and 

 Vaissicre, 1953, p. 86. — Yamaguti, 1963, p. 117. 



Pandarus lamnae Johnston, 1835, p. 203. 



Nogagus gracilis. — Milne-Edwards, 1840, p. 460. 



Dinemoura lamnae Baird, 1850, p. 286. 



Nogagus productus. — Gerstaecker, 1853, p. 63. 



Dinematura lamnae.— 'Kr0yer, 1863, p. 179. 



Dinematura affinis Thomsen, 1949, p. 14. — Shiino, 1957, p. 365. 



Specimens studied.— Single collections from each of the following 

 hosts: Isurus oxyrhynchus Rafinesque (35 OO'N, 70 00' W), Prionace 

 glauca (Linnaeus) (39 32'N, 28 02'W), Carcharodon carcharias (Lin- 

 naeus) off Boothbay Harbor, Maine, Cetorhinus maximiis (Gunnerus) 

 on loan from Zoological Museum in Amsterdam. 



Female— A good description of the female of this species has been 

 given as recently as 1957 by Shiino. His description is of Dinematura 

 affinis but, since this is synonymous with Dinemoura producta, the 

 figures and description apply. I will therefore only point out salient 

 features. 



Body form as in figure 190. Total length (based on an average of 

 2 specimens) 18.5 mm. Greatest width 8.0 mm. Dorsal thoracic 

 plates, present only on segment 4 fused basally and covering the 

 anterior third of the genital segment. Genital segment about % body 

 length. Caudal rami broad and with setae placed laterally. (Wilson, 

 1907, showed them as terminal, but in all specimens I examined they 

 are laterally displaced.) Oral area as in figure 191. First antenna 

 2-segmented and bearing stout spinose spines on first segment and 

 short naked setae on terminus of last segment. Second antenna with 

 a stout claw, sharply bent at tip. Mandible of usual type with 12 



