38 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. CO 



and stout spines. Second legs with the basipod much swollen, 

 almost spherical, but with the rami much smaller than those of the 

 first pair. The exopod is flattened, circular in outline, and armed 

 with several minute spines arranged irregularly. The endopod is 

 boot shaped and apparently unarmed. The third legs are excep- 

 tionally long and narrow ; the fourth pair are divided to their bases 

 and project nearly their entire length behind the dorsal plate. 

 Their rami are flattened into thin laminae, which are widest in the 

 center and taper toward either end. The anal laminae are long and 

 narrow-lanceolate, their tips reach a little beyond the posterior mar- 

 gin of the dorsal plate. None of the females carried egg strings. 



Color a uniform yellowish gray. 



Total length, not including fourth legs, 3.30 mm. Width of ante- 

 rior portion of dorsal plate, 2 mm. Length of four legs, 2.85 mm. 



{caudatus^ long-tailed.) 



Remarks. — The distinguishing characters of this species are the 

 large lateral wings on the anterior portion of the dorsal plate tnid 

 the broad rami of the fourth legs which project nearly their entire 

 length. The females of trigonocephalus., pagelli, and scrihae also 

 have large lateral wings, but their fourth legs either do not reach 

 the posterior margin of the dorsal plate, or barely pass it. The 

 plate in trigonocephalus is so narrowed posteriorly that the fourth 

 legs sometimes project beyond its lateral margins, but they hardly 

 pass the posterior margin, and they are only cut to their center, 

 while here the rami are separated to their very base. The boot 

 shape of the endopod of the second legs is also peculiar and unlike 

 that of any other species. 



These parasites are not at all common, since many sheepsheads 

 were examined during the summer, but only these three specimens 

 were obtained. The side view shown in figure 12 gives the best idea 

 of the lateral lobes of the anterior thorax and also of the excep- 

 tional length of the third legs. 



LERNANTHROPUS TENUIS, ney/ name. 



LernanthTGpus, species Beian, Atti Soc. Ligustica Sci. Nat., vol. 9, 1898, 

 p. 19, pi. 3, fig. 14. 

 Remarks. — In the reference above given Brian described a species 

 of parasitic copepod which he referred to the present genus, but to 

 which he gave no specific name. In going over the described species 

 for the purpose of making the key which appears above it was found 

 that this species did not belong with any hitherto described. Ac- 

 cordingly the above name is suggested for it. 

 {tenuis, slender, thin.) 



