NO. 1175. 



ISO PODS OF THE PACIFIC COAST— RICHARDSON. 



837 



a'. Terminal segmeut of abdomen widely rounded. Outer branch of the uropoda 

 not longer than inner branch. First pair of antenuie reach the posterior angle 

 of the third thoracic segment. Second pair of antenn;i' reach the middle of the 

 fourth thoracic segment. Sixth and seventh pairs of legs show only a gradual 

 increase in length 30. TecUceiis convexus, new species. 



29. TECTICEPS ALASCENSIS Richardson. 



Tecticeps alascenaia Richakson, Proc. Biol. Soc. Washington, XI, 1S97, pp. 181-183. 

 Habitat. — Alaska; Kamchatka. 



30. TECTICEPS CONVEXUS, new species. 



Body oval, somewhat liatteiied. Surface smooth ; color light yellow 

 with markings of brown. 



Head with the anterior margin much broader than the posterior mar- 

 gin, produced in front but not wholly concealing the basal joints ot the 

 first pair of antenna^, and somewhat raised, form- 

 ing two small convex elevations. The anterolateral 

 margin is likewise produced forming an acute angu- 

 lar i)ioJection, which extends in a lateral direction 

 beyond the post-lateral margin of the head. The 

 eyes are dorsally situated in a median trau verse 

 line. The first pair of anteunic, with a llagellum 

 of sixteen articles, extend to the posterior angle of 



the tliird thoracic segment. 

 The second pair of antenna?, 

 with a tlagellum of thirteen 

 articles, extend to the mid- 

 dle of the fourth thoracic 

 segment, and exceed by 

 one joint the length of the first pair of an- 

 tenna'. Ijoth pairs of antenna', are disposed to 

 lie concealed under the broad epimeral plates 

 of the thoracic segments. 



The thoracic segments are subequal in 

 length. The first segment has its antero- 

 lateral angles produced around the anterior 

 portion of the head, forming a broad plate at 

 the side of the segment. The epimera are 

 almost twice as broad as long; those of the 

 fifth segment extend downward, with tiie anterior margin straight, 

 making the length and breadth about equal, and forming almost square 

 epimera; in the epimera of the sixth and seventh segments, the anterior 

 margins are in the same direction as the posterior margins, which extend 

 downward. 



The first segment of the abdomen has three suture lines, and its pos- 

 terior margin is produced in two small points, one on either side of the 

 median line, about equidistant from it and the lateral margin of the 



FlO. 14.— TECTrCEPS ALAS- 

 CENSIS Richardson. 

 X 2i. 



Fin. 15.— Tecticeps convexus. 



a, HEAD. X 5J. b, ABDOMEN 

 AND LAStItHORACIC SEGMENT. 

 X 2|. 



