236 SCTOLLBY OF CCBEE^rr BESBABCHES LZLATIS'G TO 



In tHc stndj of this group verr special attention must be giren to the 

 larvae : the larval life is so long said fonns such a considerable part of tiae 

 total ILfe of each individna], ii^iile the larvse are so perfectly developed, 

 and their relations to their environment so complex, that there are about 

 as many sr>ecies of larva as of adnlts, and the specific difEer^iees between 

 them are follv as pronounced ; the dxSiavaiees between different genera of 

 larvae are often greater than tiioee brtweea the geoeza of adults. The folly- 

 gro^sm larvae are in no sense embryonie and generalized: save for the 

 absence of reprcductive organs they are just as highly organized as the 

 matare forms. Using the special names which have been applied to them. 

 Prof. Brocks makes a elassifieatory table of the larvas wMeh ** exactly 

 matches the one given for the adult Stomatopoda." 



Of the fifteen species of adults collected by the * Challenger * eight are 

 new: the genus Gonodactylms is iHoken np into Gcmodaetyhu (s. str), 

 I*roto»]u{Jla, and Coromda gg. nn. Among tiie material there is sufficient 

 for a fall history of the AltMia-h^TrA ; this is one of the largest of known 

 pelagic larvse, and leads an active life, pursuing and capturing with ibe 

 gnatest rapacity the Copepods and other small Cmstacea which form the 

 diief part of its food : Mr. Faxon has reai^ a SqtMa tmm an Alima^ and 

 it appears that all S^uilbe have AliwtaAarTx. The author thinks that it 

 can be shown conclusively that the AJiwta is an ErickUau which has beemne 

 accelerateil in development: the larva of tiie most primitive of the true 

 StjuShe was probably an ErieUkms-lakB Alhta. If this view be correct the 

 larvae of all other genaa of Stoanatopoda mist be looked for unong the 

 tIriiAthi and SqinUoridiiii ; here the series of larvae are so complete and 

 tnuntional forms axe so mnnerous that it is very difficult to divide it 

 into minor groins. The larva of the new gams Conmida appears to be 

 very primitive and syntii^e ; for it the provkumal name of JSridUialwtia 

 gifnthetiai is proposed. All the larvae foond by the *ChallQiger' are 

 described in detaxL 



laspoda of tiie * Liglrtafiig/ ' FoTCupine.' and 'Yaloroiu' Ezpedi- 

 tiOBS.*— The Bevs. A. M. Noranan and T. E. £. Stebbing have pubb'shed 

 the first part of their repcxl on the Isopoda of these British expedi- 

 tiiMis, in wbaA they treat of the Apsendids, Tanaidae, and Antiinndse. 

 Apart from Ute Sexc^das tihe vaoei interesting of the abyssal Isopoda are 

 the M mmids and Mnnniapeadae, whieh are famished with Mii«iiia» and 

 legs of exirautdinazj leatglh aztd delieaey of stmefcare ; nnfortmutely ibe 

 free use of sieves in washing the ooze oitiiely mntilated such specimens as 

 were oAeeted by lliese Br^uh expediti«»a. In the present report G. O. 

 Sars' arrangement of tribes and JWrnilipg is adopted. 



Of the Apsendide Sptyrt^pm* is a new genns, in which the animal is 

 km «Jong»ted than its alUes, these is no scale to the lower antennae, and 

 tlie peneon-segment nnites willi the campsce. Under the Tanaidae refer- 

 ence u made to the interesting changes whid are to be oberared as 

 following on moaha, and a comndfTation of Mr. Faxon's observations leads 

 to the Wflppstioa that tibe enonnoas gra^ing-osgians which so encroach on 

 tte moolh-OTgans as to deptivB LeptotMia and Amamg of taking food, and 

 which apftear after flie monlt whiefa precedes aexnal intereoorae, are moalted 

 off after the disdiaige of tiie sexnal fnnctions ; if they are not, tiieir pos- 

 aemor nraat die of starvation. Alaotamais and Tamadia are new genera ; 

 tiae latter appear to be most doaely allied to Sinmgglmra, and the Conner 

 has a M M USMpi al pooch composed of ei^t lamellas, wluch are attached to the 

 first four free segmeiita of the body. 



* Tbp» ZooL See. Load, xiL (188« pp. 77-141 02 pb.)- 



