632 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.39. 



All four pairs of legs are biramose; basal joints of first two pairs 

 small, of third and fourth pairs large and laminate; rami of first three 

 pairs two-jointed, of fourth pair one-jointed, sparingly armed with 

 short spines without setae. 



Color a uniform cream white except in the genital segment, where 

 the convolutions of the oviduct show an orange color; egg strings a 

 light orange. 



Total length 8.5 mm. Carapace 2.8 mm. long, 2.35 mm. wide. 

 Dorsal thorax plates together 2.35 mm. long, 3.40 mm. wide. Genital 

 segment 4 mm. long, 3.5 mm. wide. Egg strings 18 mm. long. 



Four females belonging to this new species were obtained by Dr. 

 R. E. Coker, for the Peruvian Government from the body and fins 

 of a soupfin shark (Galeus zyojyterus) near Pacasmayo, Peru, on 

 March 12, 1907, and were sent to the author by Dr. B. W. Ever- 

 mann, of the U. S. Bureau of Fisheries. 



Type.— Cat. No. 39617, U.S.N.M. 



These specimens were especially interesting because they served 

 to confirm a new Pacific coast genus established by the present 

 author in 1908.« 



This genus was founded upon a few specimens obtained from a 

 leopard or cat shark, {Triahis s emi fas datum) , at La Jolla, California. 

 It is closely related on the one hand to Dana's PJiolidopus {Lepido- 

 pus), and on the other to Steenstrup and Liitken's Perissopus, but is 

 generically distinct from both, as was clearly shown.'' The present 

 specimens agree in every generic particular with the type species, 

 A. ohlongus, and thus substantiate the new genus. The teeth upon 

 the terminal claws of the second antennae will distinguish this species 

 at once from ohlongus, and, from the way in which these antennae 

 are carried, the teeth are very prominent and easy to observe. 



LERN^OPODA INERMIS,6 new species. 



Female. — Body plump and cylindrical and bent into a crescent 

 shape; head nearly rectangular in dorsal view, with none of the 

 appendages except the second maxillae visible. Both pairs of 

 antennae and the maxillae are held so closely to the head that it is 

 almost impossible to discern them from any point of view. 



The first antennae are small unsegmented papillae, each tipped 

 with a minute spine; the second antennae are stout and flattened 

 laterally into broad laminae. These antennae are imperfectly seg- 

 mented and are biramose at the tip, the dorsal ramus being a large 

 rounded knob with a smooth surface, the ventral ramus a narrow 

 cone made up of two joints. At the base of this cone, upon the ven- 

 tral margin of the proximal portion of the appendage, is a rounded 

 protuberance covered with short and stout spines. 



a Proc. U. S. Nat. Mus., vol. 35, 1908, p. 450. 



b Inermis, unarmed, in allusion to the lack of claws or spines on the maxillipeds. 



