EUPHROSYNE MEDITERRANEA. 173 



Those of the ventral fascicle and a great part of the dor- 

 sal one have the limbs of the fork smooth , resembling 

 much those of E. capensis figured by M'Intosh, loc. cit. pi. 

 Ia , fig. 3 , only with the spur a little longer. Besides these 

 the dorsal row contains serrated bristles , quite similar to 

 those of E. borealis , figured by M'Intosh, loc. cit. pi. Ia, 

 fig. 4. No doubt these serrated bristles were overlooked by 

 Grube , Kke he did in E. laureata. In Ehlers' E. racemosa ^) 

 the branchiae seem to be more branched; however I be- 

 lieve Claparède ^) was quite right in considering this spe- 

 cies synonymous with E. mediterranea and with the little- 

 known Lophonota Audouinii, described by Costa ^). 



Explanation of the plates. 



Plate 7. 

 Fig. 1. Dorsal view of the anterior end of Eurythoë 



alcyonia Sav., from the Indian Ocean, x 3 diam. 

 » 2. Ventral view of the same. 

 » 3. Ventral bristle of a Red-Sea-specimen of the same 



species. 

 » 4. Ventral bristle of a specimen from the Indian 



Ocean of the same. 

 » 5. Elongated bifid ventral bristle of the same. 

 » 6. Stout hastate spine of the ventral fascicle of the same. 

 » 7. A long, slightly bifid dorsal bristle of the same. 

 » 8. Simple , slightly curved dorsal bristle of the same. 

 » 9. A stout, serrated dorsal bristle of the same; this 



bristle, like all the foregoing are taken from the 



48th segment. 

 » 10. Dorsal view of the anterior extremity of Phere- 



cardia lohata Horst, x 4 diam. 

 » 11. Hastate spine of the ventral fascicle of the same. 

 » 12. Ventral bristle of the same. 



1) Borstenwiirmer , p. 67, pi. I. 



2) Annel. Chetop. du Golfe de Naples, p. 418, pi. IX, fig. 8. 



3) Ann. Sc. Natur. Tom. XVI, 1841, p. 270, pi. XIII, fig. 1. 



Notes from the Leyden IMuseura, Vol. VIII. 



