REPORT ON THE AMPHIPODA. 479 



latter case they Lave the whole under side closely set with long stiff hairs, arranged in two 

 simple rows. These swimming-bristles are movably socketed, and on each joint increase in 

 size from behind forwards. Their peculiar structure is described. The structure, positions 

 and uses of various spines are investigated. 



Sections of the work are devoted to the heart and circulation, the organs of reproduction, the 

 apparatus of nutrition and glands of the intestine, a gland in the hand of the second gnatho- 

 pod of some CaprellidaB (e.g., Caprella dolirnii and Protella phasma), remarks on large 

 connective-tissue cells in the bodies of the Caprellidas, sexual differences, adaptability, mode 

 of life, epizoic plants and animals, classification. 



Prnto pedata, Fleming, and " Proto Goodsiri," Spence Bate and Westwood, (Figs. 2-3-25), are 

 given as distinct species, but the better opinion unites them under Proto ventricosa, O. F. 

 Miiller. Proto lirunneovittata, n. s., is described and figured. Remarks are made on the 

 genus Protella, Dana, and the species Protella phas7na (Fig. 26). Caprella, Lamarck, is 

 defined, and in " Subgenus I. Caprellen, deren unteres Fiihlerpaar Ruderborsten triigt," he 

 places 1. CapireJla xquilihra ; 2. Caprella amtifrons ; 3. Caprella liparotensis, n. s. (Figs. 

 41, 42), which is described in detail ; 4. " Caprella Helleri," n. s. (Fig. 43), which Mayer 

 considers to be the young form of some Caprella which cannot be determined. 



In " Subgenus II. Die unteren Antennen sind Sinnesorgane." Here are placed, 5. Caprella 

 linearis ; 6. " Caprella Dolirnii," n. s. (Fig. 44), which is given by Mayer as a synonym 

 of his subsequently published Caprella grandimana; 7. Caprella acanthi/era. Leach ; 8. 

 Caprella elongata, n. s. (Fig. 45), which Mayer considers to be a smooth variety of Caprella 

 acanthi/era. 



Of Podalirius, Kroyer, two species are given, Podalirius typicus, Krciyer, and Podalirius kroyeri, 

 n. s. (Figs. 46-49), both species being described in detail. 



In the conclusion, Haller draws out the following genealogical tree of the Caprellidae, which he 

 regards as probably Crevettina metamorphosed by a parasitic mode of life. 



Crevettina 

 {AMphitlwe) 



Proto 



I 

 Protella 



1 (Protella gracilis Dana 



I Protella phasma Mont.) 



CyamidEB. | 



.iEgina 



I 

 Caprella 



I 

 Podalirius. 



1878-Hayek, Gustav von. 



1879. 



Handbucli der Zoologie. Siebente, (des II. Bandes erste) Lieferung. Wien, 



1878. Achte (de.s II. Bandes zweite) Lieferung. Wien, 1879. 



Von Hayek divides the " Unterreich, Arthropoda, Gliederfiissler," into four classes, Crustacea, 

 Arachnoidea, Myriopoda, Insecta. In the higher forms, he says, the body is clearly divided 

 into three principal sections, constituting the head, thorax, and abdomen, but " bei den 

 Krebsthieren, als den niederst organisirten Gliederfiisslern, ist eine derartig ausgesprochene 

 Sonderung niemals zu bemerken, sondem eine mehr oder weniger weitgehende Verschmel- 



