REPOET ON THE AMPHIPODA. 571 



antennfe, furnislied posteriorly with long fascicles of bristles, — by tbe greatly produced 

 lateral comers of the head, and also by the comparatively feeble structure characterizing the 

 foremost pair of legs." Gen. 2. Erichtlwrims, Edw., 1850. 67. Ericldlwnius mer/aloji'i, 

 " Cera2}us viegalops, G. O Sars, Crust. & Pycuog. nova etc., No. 39," distinguished " by its 

 unusually large and dark-coloured eyes, greatly elongated antennae, and the form of the 2nd 

 pair of legs in the male. The genus Cerapus, Say, of which C. tulndaris is the type, 

 differs essentially, as shown by Sidney Smith, from the genus Ericldhonius Edw., belonging, 

 as it does, to the family Corophiidx. The only Northern species of this genus is C. crassi- 

 cornis (Sijahoncecetes) Sp. Bate, also met ■with on the coasts of Norway." 



Fam. Corophiidie. Gen. t/ncw?fl. Say, 1818. "Syn: Glauconome,Ivroyer, 1845." 68. Unciola 

 petalocera, " Glawonome petalocera, G. 0. Sars. Crust. & Pycnog. nova etc., No. 40," 

 " length 10 mm." " The present species bears closest resemblance to U. planipes Norman, 

 but it is easily recognized by its greater size and the peculiar lamellar form of the 3rd and 

 4th joints of the 2nd pair of antennae in the male, as also by the structure of the 1st pair 

 of legs. The 2nd pair of legs differs in the two sexes from those of U. planijjeg, the hand 

 occurring vertically truncate at the extremity and with a well-defined palmar margin." 



Fam. Dulichiidre. Gen. DuUchia, Krciyer, 1845. 69. DuJichia tuherctdata, Boeck, " DuUchia 

 septentnoncdis, G. 0. Sars. Crust, et Pycnog. nova etc., No. 41." 70. Didicliia Mrikorriis, 

 distinguished from earlier species " by its remarkably clumsy form of body, comparatively 

 robust and densely hirsute antenna?, and small whitish-yellow eyes." 71. Didiclria macera, 

 " distinguished by its slim form of body and greatly produced limbs, rudimentary eyes, as 

 also the pecid.iar form characterizing the 2nd pair of legs in the male." 



Tribe 3. Caprellina. Fam. Caprellidie. Gen. Caprdla, Lamk. 1818 [1801]. 72. Caprella 

 microtuhevculata, " of the previously known species, this approximates closest C. linearis 

 Lin., but admits at once of being distinguished by the much more produced 1st pair of 

 antennae, the form of the 2nd pair of legs, and the different colouring." The last of these 

 distinctions must be noted as of very doubtful specific value. 73. Caprella gpiiwsisaima, 

 Norman, "Caprella spmosigsima, Wyville Thomson, The Depths of the Sea, p. 126. 

 Caprella horrida, G. 0. Sars, Prodromus descript. Crust, ife Pycnog. etc., No. 137." "On a 

 former occasion," Sars observes, " I recorded this characteristic species under a new name, 

 viz., horrida, to prevent its being confounded with Stimpson's ^gina spinosissiriia. 

 Meanwhile, as the latter is identical with the form Caprella spinifera, described somewhat 

 earlier by Bell, and must, therefore, bear the last-mentioned specific designation, I see no 

 reason for suggesting any change in the name proposed by Norman for the species treated 

 of here ; wherefore it is now retained." As, however, the name Caprella spinosissima has 

 been used by Spence Bate for the species named ySgina spi7iosissiina by Stimpson in 1854 

 and Caprella ttpinifera by Bell in 1855, it becomes a synonym of the former, and cannot be 

 used again for Norman's species, which will therefore revert to the name Caprella horrida, 

 G. 0. Sars. See also Note on C. Wyville Thomson, 1873. Gen. 2. jEgina, Krb'yer, 1843. 

 74. yEgina spnnifera, Bell, the synonymy given being Caprella spinifera. Bell, 1855, 

 JEgina spnnodssima, Stimpson, 1857. ^giiia sjnnusisgtnia, G. 0. Sars, Prodromus descript. 

 Crust. & Pycnog. No. 135. "Boeck's jEgiiui echinata differs obviously alike in the 

 armature of the body and the structure of the 2nd pair of legs." The species is therefore, 

 as just observed, ^;7/);a sjw'?ioszs6'j;/ia, Stimpson, 1854. Indeed, as to Stimpson's priority, 

 I may here mention that a .separate copy of Stimpson's Synopsis, which I have recently 

 obtained, shows tlie following dates ; on the cover, " Washington City : published by the 

 Smithsonian institution, January 1853."; on the title-page, "[accepted for publication 

 January, 1853.]."; the introduction signed "William Stimpson. Smithsonian Institution, 

 Fchruarg, 1853."; on the page containing "references to the figures," " published by the 

 Smithsonian Institution, Washington, D.C. March, 1853." 



