ISOPODS OF NORTH AMERICA. 



457 



Nine specimens were obtained by the Harriman Expedition at 

 Yakutat, Alaska. They were collected by Mr. T. Kincaid, after whom 

 the species is named. Five females and four males were collected. 

 The legs of the first pair in the male are 

 not greatly longer than the others; they 

 are longer in the type species of Janiropsis. 



The very short superior antennas with 



a be 



FIG. 513. JANIROPSIS KINCAIDI. a, FIRST PLEOPOD OF 

 MALE. 6, SECOND PLEOPOD OP MALE, c, THIRD PLEO- 

 POD OF MALE. ALL x 41. 



FIG. 514. JANIROPSIS KINCAIDI. a, 

 LEG OF FIRST PAIR, x 27. b, LEG 



OF SECOND PAIR. X 27. 



few articulations, the greatly dilated joints of the maxillipeds, the 

 form and shape of the peduncle of the first pleopoda in the male, which 

 has the distal extremity fused with the branch and produced and dilated 

 at the tip, and the shortness of the uropoda, which are only half the 

 length of the terminal segment of the body, are characters which 

 undoubtedly place this species with Janropsis Sars. 

 Type.Vzi. No. 28,717, U.S.N.M. 



74. Genus IOLELLA, new name. 



Head usually with prominent rostral projection. 



Lateral parts of head usually produced into very prominent, acute 

 lappets. 



Segments of thorax with the lateral parts laciniate and produced. 



Terminal segment of body forming posteriorly on each side a tri- 

 angular expansion. 



Other characters as in Janira. 



ANALYTICAL KEY TO THE SPECIES OF THE GENUS IOLELLA. 



a. Segments of thorax with spines or tubercles on the dorsal surface. 

 b. Rostrum as long as head. Flagellum of first pair of anteniue composed of 

 twelve articles, shorter than the breadth of the head. Flagellum of second 

 pair of antennpe composed of fifty articles. First thoracic segment shorter 

 than the second. Second and third segments equal, and longest, much longer 

 than the seventh. Terminal segment smooth on dorsal side, without spine- 

 like tubercle. Peduncles of uropoda longer than post-lateral angulations of 

 terminal segment lolella spinosa ( Harger ) 



In a recent letter, Doctor Ortmann informed me that Tole was a typographical 

 error for lole, and asked me to correct the mistake in this paper. As lole, however, 

 is preoccupied, having been proposed by Pascoe (Trans. Exit. Soc. London, ne\v 

 series, IV, 1858, p. 254) for a genus of Coleoptera, I suggest the new name, lolella. 

 In Marshall and Scudder, instead of I, J has been used for lole, although I is given 

 in the original reference. (See Sars for characters of genus, Crust, of Norway, II, 

 1899, pp. 100-101.) 



