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



Grcfjarina sipxmcuU. 



T may refer here to a paper in the ' Quart. Journ. ISlxcx. Sci.' 

 Oetoher 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. 



Spectroscopic 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 Aplirodite acu- 

 leatOj also in its pharyngeal nmscular tissue, in muscles of the 

 dorsal fin of H/pjMcanijniSj in muscles of the pharynx of various 

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

 ])usclcs in the perivisceral fluid of Glycera^ of Gapitella^ of 

 Phoronis hippocrepia. and diffused in the perivisceral fluid of 

 Poh'a sangairnhra. 



No characterizable absorption-bands could be obtained from 

 the hhte pigment of VcleJIa^ from the hlae pigment of Salpa 

 deiiiocrdtica, or from the red pigment of other Saljjm, from the 

 red pigment of the foot of Cardium and other Lamellibranchs, 

 or from the rec/ pigment of chromatophores of Loligo and other 

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

 of the corpuscles of the perivisceral fluid of Sipunculus. 



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 Keale, 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 

 ernjilnyes of the station. Further, he will have the use of a 

 splendid library*, he will be able to keep his spsdmens 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 nothing, with whicli the waters of the bay 

 are teeming. 



* I take tliif opportunity of asking for contributions of zoological and 

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

 publishers in Germany have given valuable works; the Messrs. Engelmann 

 of Leipzig have presented the whole of their biological publications. 



Ann. & Mag. N. Hist. Ser.4. Vol.:d. 7 



