NO. 1175. ISOPODS OF THE PACIFIC COAST— RICHARDSON. 857 



c. Head with lateral parts produced to very prominent acute lappets. Segments 

 of thorax with lateral i^arts laciniate and produced. Caudal segment form- 

 ing ou each side, at the end, a triangular expansion 2(5. lanihe. 



c\ Head with lateral parts not produced into lappets. Segments of thorax with 

 lateral parts not produced, not laciniate. Caudal segment rounded, not 



expanded laterally 27. Janira. 



a'. Eyes lateral. Antennaj of the first pair small with flagellum obsolete. An- 

 tennfc of the second pair short, with peduncular joints dilated, rudimentary 

 flagellum, containing five articles, and equal in length to the width of the 

 head. Mandibles with a three-jointed palp, and with cutting part com- 

 posed of five teeth 28. Joropsis. 



2S. J^^RA Leach. 

 67. JiERA ^A/AKISHIANA Spence Bate. 



J(era wakishiana Spence Bate, Lord's Naturalist in British Columbia, II, 1866, 

 p.282.— C. BovALLius, Bihang till K. Sv. Vet. Akad. Handl., II, 1886, No. 

 15, p. 49. 



Habitat. — Esquimault Harbor, British Columbia. 



26. lANTHE Bovallius. 



ANALYTICAL KKY TO THE SPECIES OF lANTHE. 



a. Head with prominent rostrum ; lateral margins incised and produced into two 

 angulations. Second and third thoracic segments with epimeral lobes double. 

 Terminal segment of body with lateral angulations and central portion acute. 



68. lanthe triangulata, new species. 



a'. Head without rostrum ; lateral margins entire and produced into one anterior 

 angulation. Second and third thoracic segments with epimeral lobes single. 

 Terminal segment of body with lateral angulations and central portion blunt 

 and rounded 69. lanthe erostrata, new species. 



68. lANTHE TRIANGULATA, new species. 



Surface of body smooth; color yellow, marked with black dots. 



Head with rostrum in front equal to one-half the length of head. 

 Anterior margin lobate, between the rostrum and the lateral angula- 

 tions. The side of the head is produced in two angulations, the upper 

 one extending in an oblique direction and not reaching beyond the 

 anterior margin of the head. The first pair of antennae are not as long 

 as the width of the head. The second i^air of antennae are longer than 

 the body. 



The lateral margins of the first segment are produced into two angu- 

 lations; those of the second and third into two, with the epimera pro- 

 duced into two-lobed angulations; those of the fourth into two lobes, 

 the small epimeral lobe or angulation between; and those of the fifth, 

 sixth, and seventh into one large upper lobe, and one small lower lobe. 



The terminal segment is produced backward at tlie sides into two 

 sharply pointed angulations, with a broad triangulate central lobe 

 between, to which the uropoda are attached. The uropoda are longer 



