PENNELLA OBTHAGOEISCI. 151 



1889. Pennella orthagorisci Giard. (50) p. 82. 



1899. Pennela filosa Bassett-Smitb. (part). (8) p. 483. 



1905. Pennella filosa T. Scott. (116) p. 113. 



1905. Pennella arthag&risci T. R. R. Stebbing. (124) p. 119. 



1906. Pennella filosa Norman & T. Scott. (88) p. 216. 



1908. Pennella filosa Cuvier? A. Brian. (21 A) p. 8, text -figs. 2 & 3. 

 1910. Pennella orthagorisci T. R. R. Stebbing. (125) p. 256. 



Female. Body elongated and slender ; head mode- 

 rately large, globose or nearly so, and provided with 

 three horn-like appendages on the ventral aspect; 

 the middle horn very small and rudimentary but the 

 others of moderate size and projecting obliquely back- 

 wards. Neck elongate, slender, smooth, and equal to 

 about one third of the entire length of the animal. 

 Genital segment moderately stout and about as long 

 as the neck ; obscurely annulated and bearing at the 

 distal end two long and very slender egg-strings. The 

 terminal segment, or post-abdomen, which is fully half 

 as long as the genital segment, bearing along the 

 ventral side fascicles of branching cartilaginous ap- 

 pendages, each fascicle dividing into two or three 

 principal branches, which are again subdivided irregu- 

 larly and in a bifurcate manner into long slender 

 filaments, but including also a few which are short or 

 undeveloped. Colour of the animal blood-red. Length 

 90 to 100 mm. (3-J to 4 inches). 



Habitat. Parasitic usually on the short sun-fish, 

 Orthagoriscus mola. 



The Rev. A. M. Norman, whose kindness we have? 

 experienced on numerous occasions, has permitted us to 

 examine and figure a Pennella sent to him many years ago 

 (about 1862) by Thomas Edward of Banff. The specimen 

 was found on a short sun- fish captured in the Moray Firth, 

 and is referred to in Smiles' Life of Edward among the 

 numerous other natural history records at the end of that 

 work, under the name of Pennella jibrosa, that name being 

 no doubt a misprint for "filosa " ; unfortunately this speci- 

 men wanted the head. Some years previous to the publica- 

 tion of Smiles' Life of Edward, Dr. E. P. Wright described 

 under the name of Pennella orthagorisci specimens found on 

 short sun-fish captured in Cork Harbour in 1869* ; he also in 



* ' Ann. & Mag. Nat. Hist./ ser. 4, vol. v, p. 42, pi. i, figs. 1-6 (1870). 



