274 Miscellaneous. 



males of Temora have on the second joint a spiniform process, which 

 is wanting in Temorella ; while in Temorella the penultimate joint 

 presents a spine which is deficient in Ttmora. In Temora the 

 outer ramus of the first pair of feet is biarticulate, in Temorella 

 uniarticulate. No species of Temorella seems as yet to have occurred 

 near "Wimereux, but T. affinis has been met with off Honfleur. 



4. Isias Bonnieri, sp. n. 



" Syn. Isias clavipes, Boeck, 1864 (?), non Brady, 1878 (!)." 



The cephalothorax is of a rounded oval form and without a 

 dorso-cervical impression. The head bears a bifurcated frontal 

 rostrum, deeply incised. The antennae attain the first segment of 

 the abdomen and are of twenty-four joints in the females and of 

 twenty-one in the males ; in both sexes they are bent into the form 

 of an S. In the males the geniculation is between the eighteenth 

 and nineteenth joints of the right antennae, which are furnished at 

 their anterior margin with a denticulated crest ; the seventeenth 

 joint bears a strong articulated spine. The cephalic appendages 

 resemble those of Centropages and the genera of the Galanus section, 

 especially those of Clausia, Boeck. The natatory appendages of the 

 first four thoracic segments do not resemble the feet of CentroiKiges 

 typicus, Kroy. ; they are shorter and broader ; the outer ramus 

 terminates with a long spine denticulated exteriorly, like that 

 found in the same place in Temora longicornis. The limbs of the 

 fifth thoracic segment present characters which enable us to separate 

 /. Bonnieri from its congener. In the adult female the outer ramus 

 is triarticulate, the second joint having a long hooked spine on its 

 inner margin ; the inner ramus is simple. In the adult males the 

 biarticulate outer rami are as in /. clavipes, but the inner rami 

 differ, especially upon the right side. On both sides the inner 

 ramus is of a single joint, which on the right side is reduced to a 

 mere tubercle armed with two short spines. The abdomen, of five 

 segments in the male and of four in the female, has in both sexes 

 a tubercle on the ventral surface of the third somite. In the adult 

 female the genital segment formed by the first and second abdo- 

 minal somites has a long ciliated spine on each side of the genital 

 aperture. The fovea is as long as the last thoracic segment and 

 formed of two broad pieces bearing five terminal setae of moderate 

 size. The species is common at Wimereux, but the female has not 

 been found bearing an ovigerous sac. 



5. Centropages typicus, Kroyer. 

 Not uncommon off' Wimereux. 



6. Centropages hamatus, Lilljeborg. 

 A littoral species. 



