ZOOLOGY AND BOTANY, MICKOSCOPY, ETC. 51 



New Host for Cirolana concharum Harger. * — S. Lockwood 

 announces the discovery of this isopod in the interior of the edible 

 crab, Callinedes Jiastatus Ordway. The crab was an adult female, 

 and the parasites were crowded in the left side of the carapace. 

 Incredible to say, there were twenty-three full-grown specimens, 

 measuring 3/4 in. by about 1/4 in. each. The ovaries and the 

 tissues on the left side were completely honeycombed. How long 

 the animal could have lived, and what its real sufferance of pain was, 

 are questions. But with these predaceous wolves, literally consuming 

 its inner parts, it surely would soon succumb. It seemed to Mr. Lock- 

 wood that they must, when in the swimming larval state, have entered 

 near the eye-stalks of the crab, which, with a large catch of others, 

 was taken at the close of February in Earitan Bay, N.J. From the size 

 of the parasites, it would seem that they had been in possession some 

 three months. The determination of the isopods was due to Mr. 0. 

 Harger. The query how so large a number could have entered the 

 same place, and at the same time, he thought was met by the sup- 

 position that the crab had found a nest of the larvae, and was feeding 

 on them, when a part of the batch entered the host, as conjectured 

 above. 



Copepoda Entoparasitic on Compound Ascidians.f — Prof. A. 

 Delia Valle finds three Copepoda in the compound ascidians of the 

 Bay of Naples. The most abundant species are Doroyxsis uncinata 

 and Enterocola fulgens ; the first-named is found in the branchial sac, 

 the second only in the stomach. For the third form is established a 

 new genus, Kossmecthrus, distinguished by the form of the mouth- 

 organs and by the dorsal position of the third pair of legs ; the two 

 legs of the fourth pair show a marked asymmetry ; it occurs in the 

 branchial sacs of the ascidians. Delia Valle considers that Enterocola 

 and the new genus should form types of two new families. 



Anatomy and Physiology of Sacculina.J — Y. Delage states 

 that SaccuUna is composed of two parts, one external and the other 

 internal; the latter is made up of tubes and of a basilar mem- 

 brane. This membrane forms a kind of flattened sac invested by 

 a delicate chitinous layer, which is continued on to the tubes. Its 

 walls are formed by a layer of large cells, which, in their deeper 

 parts, separate into ramified filiform prolongations. The whole cavity 

 of the sac is occupied by cavernous tissue, which is formed of cells 

 converted into fibres ; these ramify and anastomose abundantly. 



The part which is external to the crab-host is enveloped in a sac 

 which has been improperly called a mantle, and which serves to 

 bound the incubatory pouch, and to protect the visceral mass. In 

 its walls there is a close plexus of striated muscular and a layer of 

 connective fibres ; at the point of insertion of each of these latter there 

 is a large nucleus — the nucleus of the cell which formed the fibre, 



* New Jersey St. Micr. Soc, meeting Mai-ch 19, 1883. Cf. Science, ii. (ISSS'i 

 p. 664. 



t Atti E. Accad. Lincei, Trans., vii. (1883) p. 180. 

 j Comptes Eendus, xcvii. (1883) pp. 961-4. 



