NO. 2063. NORTH AMERICAN PARASITIC COPEPODS— WILSON. 687 



maxillae posterior to them and pointing somewhat backward; no 

 anal laminae. 



Type. — Clavellopsis {Anchor eUa) laciniata (Kr0yer). 

 (Clavellopsis , Clavella and b4)cc, appearance, likeness.) 

 Remarks. — The species which go to make up this new genus have 

 heretofore been referred to the genus Clavella. But although their 

 outward appearance is like that of Clavella there are certain details 

 of structure which do not allow them to be included in that genus. 

 The chief points of distinction are to be found in the four-jointed 

 first antennae, the biramose second antennae, and the reinforced 

 second maxillae of the female and in the general form of the male, 

 together wdth the structure of the two pairs of antennae and the 

 first maxillae. 



TABLE OF SPECIES. 



1. Cephalothorax distinctly longer than the trunk 2. 



1. Cephalothorax the same length as, or shorter than, the trunk 4. 



2. Six posterior processes present; second maxillae entirely lacking, bulla attached 



to the surface of the trunk; egg strings half the length of the trunk. 



laciniata (Kr^yer), 1863, p. 687. 



2. No posterior processes; second maxillae present 3. 



3. Neck and second maxillae swollen and much wrinkled; genital process minute. 



fallax (Heller), 1865, p. 669. 



3. Neck and second maxillae swollen but smooth; genital process cylindrical and one- 



third the length of the trunk; egg strings short and stout sargi (Kurz), 1877. 



4. Two to six posterior processcb; cephalothorax and trunk thick and swollen 5. 



4. No posterior processes; cephalothorax swollen only at the base 6. 



5. Cephalothorax flexed forward; genital process minute. ro6z<sta (Wilson), 1912, p. 688. 



5. Cephalothorax flexed backward; genital process large. .paracfoa:a (van Beneden), 1851. 



6. Trunk spherical, flattened, nearly as wide as long; head with a dorsal carapace. 



strumosa (Brian), 1906. 

 6. Trunk cylindrical, flattened, six times as long as wide; no dorsal carapace. 



producta, new species, p. 688. 

 CLAVELLOPSIS LACINIATA (Kr0yer). 



Anchorella laciniata Kr0yer, 1863, p. 308, pi. 16, fig. 8, a and b. 

 Clavella laciniata Wilson, 1913, p. 259, pi. 49. 



Host and record of specimens. — Five females and two males were 

 found attached to the skin in the roof of the mouth of the doctor fish, 

 Teutliis Jiepatus, at Montego Bay, Jamaica. They have received 

 Cat. No. 42310, U.S.N.M. 



Remarlcs.— The female of this species was briefly described by 

 Kr0yer in 1863, and was not seen again until the summer of 1910, 

 when both sexes were obtained by the present author in Jamaica, 

 and were fully described and figured in the reference given above. 



The species was then referred to the genus Clavella, but further 

 study compels its separation and establishment as a distinct genus. 

 And since this is one of the oldest and best known species it is made 

 the genus type (see pi. 27, fig. K). 



