392 Miscellaneous. 



ment occurs on the lower part of the branchiferous portion of the 

 back. The animal is well figured, with elaborate details. Its total 

 length is 0-0075 metre. — Annali del Maseo Civico di Storia Natii- 

 raU di Qenova, i. pp. 47-54, pis. 4-7. 



On the Entozoa of the Dolphins. By M. H. Gervais. 



About twenty species of Entozoa have been indicated as living in 

 the toothed Cetacea, and M. van Benedeii has lately published a 

 complete list of them in the Bulletins of the Belgian Academy. 



Of these the common porpoise {Phoccena communis) alone has 

 furnished five — namely, Ascaris simplex, Strongyliis injiexus, S. 

 minor, S. convolutus, and Filaria injle.vicaudata. Only two are cited 

 from the common dolphin {Delphinus Delphis), namely Echino- 

 rhyndius pellucidus and Phyllohothrium Delphini. A dolphin of this 

 species from Concarneau, dissected at the anatomical laboratoiy of 

 the Museum, furnished, besides the Phyllohothrium, several other 

 species, namely: — among the ITematoda, (1) Ascaris simplex, pre- 

 viously observed in the porpoise ; (2) an undescribed species of Tri- 

 chosoma found in the lung : among the Trematoda, a species of fluke 

 {Distoma) extracted from the biliary canals : and araong the Cestoda 

 a very singular worm, with a long and slender body, without arti- 

 culations, and resembling the Ligulce, but possessing, like the scoleces 

 of this order, a cephalic inflation furnished with four disks, but 

 wanting the circlet of hooks. The scoleciform part is slender, and 

 may be about one metre in length. From the head start two long, 

 waved excretory canals, analogous to those found by M. van Benedeu 

 in the Cestode worms of various osseous fishes. 



These woims were enveloped in cysts placed on the lower surface 

 of the diaphragm, and some of them on the anterior abdominal 

 muscles. The cysts are very voluminous, measuring 3 or 4 centi- 

 metres in length and 2 in breadth ; they are generally oval or 

 almond-shaped, but sometimes nearly spherical. Their walls are 

 tolerably resistant ; on cutting into them, a second envelope is 

 found, forming a second cyst, of which the form varies greatly. 

 The greater number of them were splterical, and one of the halves 

 was invaginated in the other : this kind of sphere was umbilicated 

 at one of its poles ; and a very delicate nearly transparent membrane 

 fixed it to the wall of the first cyst. Others were oval, flattened and 

 festooned at the margins ; others, united by their extremities, com- 

 municated through a short hollow pedicle. On opening the second 

 cyst, the wonn is found coiled up like a ball of thread. 



The author regards this worm as constituting a new genus uniting 

 the Tcenice with the Ligulce ; but the generative form (strobile) has 

 yet to be discovered. He proposes to name the animal Stenotenia 

 Delphini. The dolphin which furnished it also contained numerous 

 smaller cysts tenanted by Pliyllohotlirium Delphini ; and the author 

 has met with the latter species in a very old Delphinus Tursio taken 

 in the Mediterranean near Cette. — Comptes liendus, Nov. 28, 1870, 

 p. 779. 



