238 scnaiAfiY of cubbest bsskabches relatisq to 



of Bramdupms tataiAe it, fcowerer, to sarviye in the open water in spite of 

 Ub fornddahle enemj. 



"Hew Genus of Farasitie Copepoda..* — M. E. Cami has fonnd in the 

 tiflsoe ai the Synaseidian MorekelUMM argus, a new genus of parasitic Cope- 

 pods, far vldeh he pxv^oees tiie name of Aplo^oma hrevkauda : it is most 

 remarkable on accmmt of the rednetion of the bnoeal armatare, the man- 

 dibles, maTiTlg, and first pair of maxillipeds being lost ; the second pair 

 of myriTlijwtla geems to be represraitel by two triarticuLate appendages, 

 bal even fliese have aoqpdred a locomotor fnnction : the adult female is 

 1^ mm. hmg, and the body oraisists ci nine rings, i<j\xr of which go to the 

 short taiL Am«ig the ascidiieoloiis forms the new genns seems to be 

 most nearly allied to Cryptc^odms flatmg, but that species, as described by 

 U. Herae, has ample mnltiartunilate limbs, and two pairs of baccal 

 appendages; in the considerahle redoetian of its abdominal region and the 

 modification of the appendages of the fifth thoracic somite of the female, it 

 approaehes Emteroada, but it cannot be placed with either of these two 

 generic types. 



Hie FodiMtolliata.t — Prof. A. S. Pa>ckard proposes the term Podostomata 

 fiir the group formed by the oidezs Mranetomata (with the suborders 

 Xiphosma, Synxiphosnra and Enrypterida) and Trilobita ; they may be 

 de&ied as marine arthropods in which the cephalic (Liruultisj or cephalo- 

 tikoxaac (Trilobites} appendages are in the form of legs, which nsoally end 

 in dielae, and hare the basal joints spiny so as to aid in the retention and 

 partial mastication of the food. No fonctional antenna. Eyes both simple 

 and CMnpoond. Sespiration branchiaL Brain supplying nerves to the eye 

 alone, tiie nerves to ^le eephaUc or cephalothoracic appendages originating 

 from an cesophageal ring and the ventral cord eo&heathed by a ventral 

 arterial system. Highly developed coxal glands with no exiernal opening 

 in theadolt. 



The dass difEezs fimn &e Arachnida in haring no fonctional chelicene 

 (^ mandibles ") or pedipalps ("* ma^TTllff; "j in the cephalic appendages, bat 

 bearing a minnte pair c^ rnignps, and in the absence of nrinary tubes. They 

 differ from the Cmsiacea in the lack of functional antenna, in the mouth- 

 parfcs, in the ocmipoond eyes having no rods or cover, in the distribution 

 of the oezidiral nerves, and in the poBBeasiim of an arterial coat enveloping 

 the eraitral nervous cord. 



Cnutaeea of tile 'Earwe^an. Horth Sea Expedition.; — ^° ^^^ second 

 part of his report on the Morth Sea Cmstaeea Prof. G. O. Sars enumerates 

 Ihe 337 species collected, and discnsees their geographical distribution ; 

 there are notes on a £bw ; sixty-four in all are new, and of these thirty-eight 

 are Amphipods. 



Vermes. 



Stractnre and Derelopment of the Generative Organs of Earth- 

 worms.! — Dr. E. S. Bergh deals with the much-vexed question of the 

 stmeture and devdojmieBt of the generative organs of earthworms ; in his 

 histforical introdneiion he refers to tiie now well-known discovery of Hering, 

 but he omits to notiee Ihat r description and figure of the generative 



* Comptea Beadiui, da. (1886) pp. • j25-7. 

 t Ama. NatanUL. zz. (1886) f^ 1060-6. 



t I)n HonAe Nndhavs-ExpediliaD, 1876-8. xr. Zooktgi. GrasiMsea iL, 4to, Cliris- 

 tiaaia, 1886^, 96 pp., 1 mapt (Norwegian and Ea^tiah in yraH*'! oclumnE.) 

 § Zdimia. L Wua. Zod., xliv. iVSSG) pp. 3«;-32 (1 pL). 



