made at Naples in the lointcr o/' 1871-72. 97 



Gregarina .tiprincuU. 



I may refer here to a paper in the 'Quart. Journ. Micr. Sci.' 

 October 1872, in which I have described some facts relating to 

 the development of this form, and figured the pseudo-Navicula 

 or spore-form, the Moneran, pseudo-Cercarian, and Gregarina- 

 forms of this parasite. 



Spectroscop ic Observations. 



Numerous observations with the spectroscope on a variety 

 of animal colouring-matters gave the following results. 



Haemoglobin is present in the nerve-cord of AjjJirocUte acu- 

 leata^ also in its pharyngeal muscular tissue, in muscles of the 

 dorsal tin of Hippocampus^ in muscles of the pharynx of various 

 mollusks, in corpuscles in the blood of Solen legumen^ in cor- 

 j)uscles in the perivisceral fluid of Glycera, of Capitella, of 

 Phoronis hippocrepia. and diffused in the perivisceral fluid of 

 Polia sanguirubra. 



No characterizable absorption-bands could be obtained from 

 the blue pigment of Velella^ from the blue pigment of Salpa 

 democrutica, or from the red pigment of other Saljxe, from the 

 red pigment of the foot of Cardium and other Lamellibranchs, 

 or from the reo? pigment of chromatophores of LoUgo and other 

 red pigments offish, &c., or from the madder-pinlx. pigment 

 of the corpuscles of the perivisceral fluid of Sipnnculus. 



I cannot conclude this summary without pointing out how 

 great an advantage will be gained by zoologists in the station, 

 now nearly ready for work, which my friend Anton Dohrn has 

 erected on so magnificent a scale, by the devotion of his 

 private fortune and much energy and patience. It stands in 

 the Villa Reale, on the sea's edge ; and there the naturalist will 

 not have to dispute and bargain with the intelligent but 

 rascally fishermen ; all will be managed for him by the 

 employes of the station. Further, he Avill have tlie use of a 

 splendid library*, he will be able to keep his sp3( imens with 

 ease in the tanks of the station, supplied with streams of sea- 

 water, and will have constantly the means of contemplating, 

 even when he may not wish to study minutely, those exquisite 

 forms which came in hundreds through my hand-!, but of which 

 I have here said notliing, with which the waters of the bay 

 are teeming. 



* I take this opportunity of askinf? for contributions of zoological and 

 botanical books or papers to the library of the Naples station. Several 

 publishers in Germany have given valuable works; tlie Messr.*^. Engelniann 

 of Leipzig have presented the whole of their biological publications. 



Ann. & Mag. N. Hist. 8er.4. IW. xi. 7 



