LERN^A LUMPI. 147 



chitinous neck and head which may remain fixed to the 

 fish for a considerable time. It is interesting to note the 

 difference in the form of the body of the two closely allied 

 genera Pennella and Lernasa : in the one the body is elongated, 

 cylindrical, and straight or nearly so ; in the other it is bent 

 back upon itself, forming one or two more or less abrupt loops. 



Genus 28. HJEMOBAPHES Steenstntp $ Liiiktn, 



1861. 



Parasites having a general resemblance to Lernsea. 



Head rectangular, flattened, longer than broad and 

 without lateral horn-like appendages. Two short, 

 more or less distinct thoracic segments immediately 

 posterior to the head, each bearing a pair of rudimen- 

 tary bilobed appendages, followed by two pairs of legs, 

 biramose and biarticulate. Xeck elongated, the 

 anterior end abruptly reflexed so that the head 

 becomes pendulous, and near the flexure are two short, 

 lateral, bluntly-pointed horns. Genital segment sig- 

 moid, proximal half swollen, distal half narrower and 

 with the apex bluntly pointed, a pair of short lateral 

 processes occurring on either side over the origin of 

 the egg-strings. Egg-strings very long and slender, 

 but twisted up into regular convoluted spires. 



1. Haemobaphes cyclopterina (0. Fabr.). 

 (Plate XLIV, figs. 5-7.) 



1780. Lermea cyclopterina O. Fabr. Fauna Grcenlandica, p. 337. 



1822. Lernseocera cyclopterina Blainv. (24) vol. 95, p. 376. 



1837. Lern&a cyclopterina Kroyer. (70) p. 502, pi. v. fig. 4. 



1840. Lerntea cyclopterina M. Edwards. (43) vol. iii, p. 529. 



1861. Hsemobaphes cyclopterina Steenstrup & Liitken. (127) p. 405, 



pi. xiii, fig. 30. 



1900. Hiemobaphes cyclopterimis T. Scott. (112) p. 162, pi. vii, fig. 14. 



Female. Head small, rectangular, without horn-like 

 projections ; two short, more or less distinct thoracic 

 segments crowded behind the head, each furnished 

 with a pair of rudimentary bilobed appendages. Two 

 pairs of biramose legs with two-jointed rami also 

 present, the rami being more or less setiferous. Neck 

 long and slender, and bearing midway between the head 



