Mr. J. Lubbock on two new species of Calanidse. 117 



■ structa. Spina prehensili magna. Pede postico maris sinistro, 

 p™vo'non ad apLm tumido, Son papilloso, ramo mtemo nullo. 



]sab: Adaitticum oceanum, S. Lat. 18° 22', Long. 2° W. 

 Pontella Bairdii. 



I now proceed to describe P. Bairdii, which I have so named 

 in honom- of Dr. Baird, who has done so much to mcrease our 

 knowledge of the Entomostraca of this country. 



This species agrees in most pomts very c bsely with L Dar- 

 wirm, but diifers from it in having an inferior eye, besides the 

 two superior ; it belongs therefore to PonteUa. 



ThLphaiothora. has only six joints, the last having coalesced 

 with the preceding. The anterior segment ^gf ^^^'^^ ^^.^^ 

 L. DarwLii in not having a spme dnected outwards, as is the 

 case in L. magna and Patagonienszs The rostrum (PI. V. hg. 5) 

 is strong, deeply forked, and extends downwards as [ar a« ^^^ 

 inferior eye. Each fork is about ^^^ m length, j^^ m bieadtn 

 at the base, and yig ^^If way down. i .l,o„ ;„ 



The superior eies\-e a good deal larger m the niale than m 

 the femafe. In one specimen they are bright v-let, ^^ut in e-^^ 

 other specimen the colour has been entirely removed; while the 

 hiferioi eye, which is also violet, has in very many mstances re- 



^"'T/f/XlTL is situated between the anterior antenna, it 

 is llrge tZas remarked above, dark violet. It would be impos- 

 sible to overlook it, even in the most cursory ^^^^lon ■ 

 I shall refer to this point agam when I consider the ciassiti- 



"^'rhe anterior antenna of the female and tl^^Mt antenna of the 

 male has on the internal side of the apex of the penultimate seg- 

 ment a long hair ^V of an inch in length, and he apical and 

 Antepenultimate segments have each a corresponding one J^ of 



^?^^^J^^e male is formed upon the same type 

 as that of L. DarwinM, from which it differs chiefly m the apical 

 ; ate being longer, reachmg nearly to the apex of ^e -tepenu^- 

 timate segment ; and in the three apical segments bemg moie 

 pe^ shS, with the larger end in front. In some specimens 

 E antenna was more swollen than in others, which perhaps 

 may be accounted for by differences of age, or by the state ot 



development of the spermatic tube. 



The second pair of antenna ^\ m length. 



The mandibles -,\in\ensth, and the palpus also ^^. Each obe 



of the palpus has six long plumose hairs, and the mnei lobe 



also four smaller ones. 



