LERNEOPODA. 195 



Genus 41. LERNJEOPODA Blainville, 1822. 



Female. — Body generally elongated ; cephalothorax 

 short, wider behind than in front, more or less dis- 

 tinctly separated from the remaining part of the body, 

 and sometimes with a chitinous shield-like dorsum. 

 Genital segment elongated, sometimes ovoid or saccate, 

 and unsegmented. Abdomen obsolete or nearly so; 

 posterior processes two, short, or none. First maxilli- 

 peds near and a little behind the mouth. Second 

 maxillipeds long or moderately short, slender, wide 

 apart, and only united at the tip to a chitinous button 

 or plug usually buried in the tissues of the host. 



Male. — Much smaller than the female, somewhat 

 elongated and distinctly segmented. Cephalothorax 

 sometimes provided with a dorsal shield, and usually 

 separated from the abdomen by an obvious articulation. 

 Abdomen usually segmented. Antennules small, two- 

 or three-jointed. Antennae tolerably large. Mouth in 

 the form of a short conical siphon. Maxillipeds large 

 and uncinate. 



1. Lernaeopoda elongata (Grant). 

 (Plate LXI, figs. 5, 6; Plate LVII, figs. 13-17.) 



1827. Lernsea elongata Grant. (53) vol. vii, p. 14V, pi. ii, fig. 5. 



1838. Lerneopoda elongata Kroyer. (70) i, pi. 2, fig. 12 ; pi. 3, fig. 3 a. 



1840. Lermeopoda elongata M. Edwards. (43) p. 515. 



1850. Lerneopoda elongata Baird. (4) p. 333, pi. xxxv, fig. 5. 



1861. Lermeopoda elongata Stp. & Ltk. (127) p. 422, pi. xv, fig. 37. 

 1S61. Lermeopoda elongata P. J. van Beneden. (15) p. 154. 



1862. Lerneopoda elongata Turner & Wilson. (140) p. 85. 



1900. Lermeopoda elongata T. Scott. (112) p. 171, pi. viii, figs. 11-15. 



Female. — Cephalothorax distinct, ovate, flattened, 

 obtusely and narrowly rounded in front, but becoming 

 gradually wider and thicker behind, the posterior 

 margin being rounded and somewhat gibbous. Genital 

 segment elongate, subcylindrical, slightly depressed, 

 about as wide as the cephalothorax but distinctly 

 narrower where it joins the head ; distal end truncated 

 and provided with two small appendages on the ventral 



