part under its own microcoverglass (12 X 12 mm). I 

 use a one-end frosted slide and mount in small 

 drops of Hover's or Reyne's mounting media (or, for 

 less permanent mounts, lactic acid). Each 25 X 75 

 mm slide can take up two rows of four 

 microcoverslips (12 X 12 mm), i.e., 



I then have an entire dissected animal on a single 

 slide. I usually dissect and place under separate 

 coverslips the A, and A,, remainder of head, P, , P^, 

 Pj, P., Pj, urosome, and caudal rami. Hamond 

 (1969) however, suggests streaking the mounting 

 media and placing each part of the animal in the 

 streak in the order in which they appear on the 

 animal and using a large coverslip to cover the en- 

 tire streak. Other authors have suggested mounting 

 between two coverslips or on specially constructed 

 slides (e.g., Humes and Gooding 1964) in order to 

 give equal access to either side of any part, but I 



have not found this necessary. In Reyne's media, 

 hardening will take place in 1 or 2 days and the slide 

 need not be ringed; in Hoyer's hardening takes 1 or 

 2 wk and should be ringed for permanent mounts. 



6. Each part of the animal is now available for viewing 

 and can be drawn (using a camera lucida) or 

 photographed should the investigator desire. 



7. The process should then be followed for all the 

 specimens in the collection and, of course, each 

 slide labeled. 



8. For permanent storage of whole animals 70% 

 ethanol is recommended. 



The most complete treatise on harpacticoid copepods 

 is Karl Lang's 1948 two-volume Monographic der Har- 

 pacticiden. which has recently been reprinted and is now 

 available. The monograph discusses morphology (exter- 

 nal and internal) and lists and gives figures, keys, setal 

 formulae, etc. for all species described up to 1948. No 

 serious harpacticoid .systematist can be without a copy of 

 Lang's 1948 monograph. Also extremely valuable is 

 Lang's 1965 Copepoda Harpaiticoidea from the Califor- 

 nian Pacific Coast in which he updates, revises, and dis- 

 cusses each of the species of the genera he encountered in 

 California. For a listing of all marine species described 

 after Lang 1948 see Bodin (1967, 1971). 



KEY TO THE GENERA OF MARINE HARPACTICOIDA OF 

 THE NORTHEASTERN UNITED STATES 



This key is necessarily incomplete because there are 

 undoubtedly many species in the northeastern LInited 

 States that as yet have not been reported. Since the pur- 

 pose of the key is to acquaint the nonspecialist with the 

 Harpacticoida and since the northeastern fauna is poorly 

 known, the key is only to genus. If the key were to species 

 it might lead a user to misidentify an unreported species 

 as one listed in the key. Thus, by providing keys only to 

 genus, unnecessary taxonomic-nomenclatural problems 

 can be avoided. Furthermore, in some genera it is almost 

 impossible to separate the species morphologically 

 without detailed analyses of specific body parts. This 



type of taxononiic separation is beyond the scope of this 

 manual and should be left to the specialist. 



All species recorded from the northeast are listed in the 

 annotated systematic list that follows the key, and it 

 should be consulted for references to northeastern find- 

 ings and descriptions. 



In couplets where genera are identified, the designa- 

 tion of general body form (see Fig. 1 and p. 2) follows the 

 generic name. If no "body shape" follows the generic 

 designation, the genus does not resemble one of the forms 

 illustrated in Figure 1. In all figures of legs the exopod is 

 alw'ays on the right, the endopod on the left. 



1 



Body laterally compressed or dorsoventrally compressed with square cephalic shield 2 



1 Body not compressed 3 



9 



