ART. 15 COPEPOD CRUSTACEANS OF CHESAPEAKE BAY WILSON 33 



TEMORA TURBINATA (Dana) 



Calanus turhinatns Dana. Wilkes Expedition, Crustacea, vol. 14, p. 1057, 1853. 

 Temora turhinata Giesbrecht, Fauna und Flora des Golfes von Neapel, vol. 19. 

 p. 329, pi. 17, figs. 14. 17, 18, 21 ; pi. 38. fis,'. 27 ; 1892. 



Occurrence. — Found only ditring: autumn and winter in the outer 

 bay at stations near the mouth. Taken at the bottom, at the surface, 

 and in the vertical net in consecutive hauls at one station. A single 

 surface haul at Station F, December 4. 1920, yielded 1,000 specimens 

 of this species. 



Remarks. — This species has not hitherto been reported from our 

 American shores. It can be distinguished from longicomis most 

 readily by the short anal segment and the details of the fifth legs. 

 Although it was not found at all in the inner bay, it was present in 

 the outer bay in numbers sufficiently large to give it considerable 

 economic importance. In all probability it furnishes an important 

 constituent in the food of the shad when they come to the bay in 

 their spring migration. 



Suborder HARPACTICOIDA 



ALTEUTHA DEPRESSA Baird 



Altetitha depressa Baird, British Entomostraca, p. 216, pi. 30, figs. 1, 2, 1850.— 

 G. O. Sars, Crustacea of Norway, vol. 5, p. 64, pi. 38, 1904. 



Occurrence. — Taken at Station F over a sandy bottom in 16 meters 

 of water, at Station G' over a bottom of mixed sand, gravel, and 

 mud in 28 meters of water, and also in surface and vertical nets; 

 found only during December and January. Not enough specimens 

 were obtained in any one haul to equal even 1 per cent of the total. 



Remarks. — This littoral harpactid was found in such small num- 

 bers and was so restricted in its distribution at the very mouth of the 

 bay that it must be re'garded as a straggler from the outside ocean. 



CANUELLA ELONGATA. new species 



Plate 3, A-H 



Geiteral characters. — Body of nearly the same width throughout, 

 slightly narrowed posteriorly, with deep grooves between the seg- 

 ments. Abdomen with three segments ; caudal rami twice the length 

 of the last segment, inclined at an angle of 45° with the body axis, 

 each tipped with four setae. 



Specific characters of female. — Head small and a little wider than 

 the first segment, from which it is distinctly separated. Lateral 

 areas slightly and rather squarely expanded; rostral plate broad 

 and rounded at the tip. First thoracic segment well defined, but 

 much shorter than the others, succeeding segments about the same 

 length and width. Genital segment slightly narrower than the fifth 



