95 



Several tendencies are noticeable in this series of forms: 

 parvipes has few and alfaroi no teeth on the maxilla; lineolus, 

 ■uniformis and alfaroi have lost the basal constriction of the tail, 

 and it is weakly developed in parvipes. 



It is probable that infuscatus is wrongly recorded from Haiti 

 and is indeed a synonym of lineolus. It was described on the 

 same page as parvipes and was said to have smaller legs (in 

 parvipes hind leg reaches over 4 costal folds, in infuscatus the 

 hind leg reaches the antepenultimate groove, hence over two 

 folds) . Furthermore, it has a long narrow form, the head width 

 being 7 times included in the length from snout to vent; and the 

 tip of the tail was reproduced, which could not be true of any 

 Oedipus unless the basal constriction of the tail was weak or 

 lacking as in these worm-like forms. The proportions given are 

 quite those of linehlus. 



Disregarding the Haitian form as mythical, the general 

 relationships of the Panamanian and Costa Rican forms may be 

 stated thus: in Panamd; occur two forms with 17 costal grooves, 

 each related to a Costa Rican form which is more elongate and 

 has 19-20 costal grooves. These two sets are complex-uniformis, 

 and parvipes-alfaroi. Oedipus collaris, a large sharp-snouted 

 form, ranges from Panama to Nicaragua; lineolus, with fewest 

 costal grooves, is known only from Mexico. 



