478 ME. t. w. BASSBTi-sMrrH ON [Apr. 18, 



The egg-sacs are broad and long, placed by tbe side of the body, 

 and embraced by some of these jjrocesses, but not projecting. A 

 single median eye. 



Male. Much smaller, witli distinctly segmented body attenuated 

 posteriorly. Cephalothorax as a buckler, with two free thoracic 

 rings, the second bearing two strong spines. The tail has 8 free 

 rings, tbe last provided with two caudal appendages. Anterior 

 antenuae 6-jointed. Posterior with two, the last carrying two 

 curved setae. First maxillipeds large. 



Philichthts xiphi.e. $ s • (Plate XXVI. fig. 2.) 



Philichthys xiphice Stp. Oversigt Danske Videnskab. 1861, p. 295, 

 pi. ii. 

 „ „ Bergsoe, Monograph Fremstellet, 1864, pi. i. 



„ C. Vogt,' Arch. Zool. Exp. vol. vi. 1877, p. 407. 

 Host : mucous canals in head of Xiphias r/ladius. Europe. 



G. 2. RiCHiABDiA, gen. nov. 



Female. Head small, obtuse. Body elongated, segmented, the 

 second thoracic ring being very much enlarged, oval or rounded, 

 followed by five attenuated joints, the second of which has the 

 genital opening. Three pairs of lateral non-articulate acute pro- 

 cesses on each side, with a pair of caudal appendages, and a pair 

 also of frontal ones directed forwards. Anterior antennae triarti- 

 culate. Egg-sacs long, thick, placed by the side of the body as in 

 the preceding genus. 



(1) ElCHIAKDIA LICHIJE. $ . 



Philichthys lichice Eichiardi, Atti Soc. Toscana di Sc. Nat. 1876, 

 iii. pi. vi. fig. 1. 



Host : frontal sinus of Lichia amia. Mediterranean. 



(2) ElCHIARDIA PAGEI. $ . 



Philichthys pagri Eichiardi, op. cit. 1876, pi. vi. fig. 3. 

 Host : frontal sinus of Pacjriis vulgaris. Mediterranean. 



(3) ElCHIABDIA PAGELLI. $ . 



Philichthys pay elli Eichiardi, op. cit. 1876, pi. vi. fig. 4. 

 Host : frontal sinus of Pagellus mormyrus. Mediterranean. 



(4) ElCHIARDIA EDWABDSI. $ . 



Philichthys edwardsi Eichiardi, op. cit. vol. ii. 1875, pi. vi. 

 fig. 4. 



Host : frontal sinus of Serranus cabrilla. Mediterranean. 



(5) ElCHIABDIA STEENSTEUPI. 5 . 



Philichthys steenstrupii Eichiardi op. cit. 1875, pi. vi. fig, 5. 

 Host : frontal sinus of Mullus barbatus, M. surmuletus. 



