254 



Part III. — Twenty-second Annual Report 



The second maxillipeds were moderately powerful, but the other 

 appendages were smaller and weaker. 



As this young female agrees with none of the other young forms 

 described by Dr. Hansen, I prefer for the present to regard it as the post 

 larval stage of his Splueronella ampkilochi. 



As a list of the genera and species of the Choniostomatidae described 

 by Dr. H. J. Hansen in his interesting work on that curious group of 

 parasitic Copepoda may be useful, I give it here. To this list I have 

 added the few odd forms mentioned in the preceding notes, and one or 

 two others recorded in previous Keports. The names of the hosts on 

 which the parasites have been obtained are also given, and I have indicated 

 by an asterisk (*) such of the species as up till now have been observed 

 in Scottish waters. This will show how much room still remains for 

 further research among these minute organisms. 



The names of the parasites are arranged in alphabetical order on the 

 left-hand side of the page, while the names of the hosts on which they have 

 been found are placed immediately opposite. 



Names of the Parasites. 



Names of the Hosts. 



Gen. Aspidoeeia. 

 *Aspidoecia normani, Giard and 

 Bonnier. 



Gen. Choniostoma. 

 Choniostoma hanseni, Giard and 

 Bonnier. 



Choniostoma mirabilis, H. J. 

 Hansen. 



Gen. Homreoscelus. 

 Homceoscelus mediterranean 



H. J. H. 

 Homceoscelus minuta, H. J. H. 



Gen. Mysidion. 

 Mysidi.on abyssorum, H. J. H. 

 ,, commune, H. J. H. 



Gen. Sphceronella, H. J. H. 



(a) Sphceronellas pa 



Sphceronella abyssi, H. J. H. 



,, acanthozonis, H. J. H. 

 ,, amphilochi, H. J. H. 



antillensis, H. J. H. 

 argissce, H. J. H. 



Erytlirops elegans, G. 0. Sars ; 

 E. serrata, G. 0. Sars ; E. ery- 

 tlirophthalmus (Goes.) ; E. 

 microplithalmus, G. 0. Sars ; 

 and E. abyssorum, G. O. Sars. 



Rippolyte gaimardii, M.-Edw. and 

 II. jiolaris (Sabine). 

 ,, gaimardii, M.-Edw. 



Iphinoe trispinosa (Goodsir). 

 Diastylis lucifera (Kroyer). 



Erytlirops abyssorum, G. 0. Sars. 



Erythrops serrata, G. O. S.; E. 

 abyssorum, G. O. S.; and Par- 

 erythrops obesa, G. 0. S. 



rasitic on Amphipoda. 



Astyra abyssi, Boeck. 

 Acanthozone cuspidata (Lepech.). 

 Amphilochoides odontonyx (Boeck). 



(=Amphiloclwides pusillus, G. 



O. Sars). 

 Corophium bonelii, M.-Edw. 

 Argissa hamatipes, Norman {=A. 



typica, Boeck). 



