93 REPORT — 18G7. 



the spring. The muscles draw the spring forward and bring it under a small latch 

 or catch ; directly this is relaxed, the elasticity of the organ jerks the spring back, 

 and throws the creature upwards aud forwards. The author described in detail 

 the muscles by which the spring is moved. Another remarkable peculiarity, and 

 in the author's opinion the special characteristic of the Thysanura, is the presence, 

 on the iirst abdominal ring, of a process which acts as a sucker in the Podurida?, 

 and in Smynthiiriis gives rise to two long filaments which serve the same purpose. 

 The author described the arrangements of the muscles by which this cmious appa- 

 ratus is moved. He then described tlie digestive and respiratory organs ; and after 

 pointing out that Snvjntlmnis and Papirms, though very nearly allied in external 

 character, differ entu-ely in their method of respiration, the latter genus being almost 

 or entirely deficient in trachea?, he proposed, therefore, to form for it a new family, 

 which he proposed to call Papiiiidce. 



BemarJcs on Mr. J. G. Jeffreys's Collection of Hehridean Annelids. 



By i)r. M'Intosh. 



The total number of species amoiuits to fifty ; though this is not a large collec- 

 tion, many of the species are very rare. Of the forms for the first time noted in 

 Britain are La-tmatonice Jilicornis, Kiuberg (and this he belieA'ed to be the same as 

 Dr. Baird's L. Kinherc/i), Pra.rilla 2]riTtcrmis><a , MalmgTen, lihodine Lovcni, Mgrn., 

 Amphicteis Gunneri, 8ars, and Hderonereis fucicola, ffirsted. 



Those at present considered new are a second species of Amphicteis, a pecu- 

 liar Lumhri nereis with eyes, a form allied to Travisia, but furnished Avith forked 

 bristles, a Troplionia, and an Idalia. 



Rej^ort on the Invertebrate Marine Fauna and FisJies of St, Andreivs. 



By Dr. M'Ixtosh. 



The richness of the coast-line at St. Andrews in marine animals was pointed out — 

 a state in some measure due to the varied habitat afforded by a smooth sandy beach 

 and a rocky border, with a large surface of tidal rocks. Its proximity to fertile co- 

 ralline gi'ound and the haunt of many deep-sea rarities, Avhich are tossed on shore 

 by storms or procured from the stomachs of fishes, all combine to render it a most 

 interesting field for the zoologist. Lists of species in the various departments were 

 given, and the most remarkable forms alluded to, such as Sac/ifta hipimctata, Mul- 

 yula (irenosa, and Pelonaia corrugata. The Mollusca number 170 species. 



On the Annelids of St. Andrews. By Dr. M'Intosh. 



The list of Turbellaria, Teretularia, and Annelida consists of 104 species, and 

 besides there are (5 Gephyrea. 



One of the Turbellaria is new to Britain, viz. Vortex capituta, ffirsted: one of 

 the Teretularia is also new, viz. a Porhsia, from deep water. He mentioned that he 

 bad observed no structural difference between Cephcdothrix riijifrons and C.Jiliformis, 

 aud none between Otnmafopka alba and O. rosea. The only ^' Parlasia" piirpwea, 

 Jolmst., met with in Britain is an Ommatoplean worm, which differs totally in 

 structure from a true Borlasian. 



Amongst the Annelids new to Britain are Ilalosydna r/elatinosa, Sars (Aletitia 

 f/clatinosa, Malmgren), and Nereis vircns, Sars (Alitta virens, jNIalmgren), b}^ far the 

 largest British marine worm yet encountered. Nereis Sarsii, Eathke, a distinct 

 species, has been confounded with N brevimaiia, Johnst., and consequently has not 

 been previously mentioned as British. The Si/dis armil/aris of Dr. Johnston in- 

 ♦iudes two species, one of which abounds under stones between tide-marks, wliereas 

 the second comes only from deep water. Other additions to the British fauna 

 are Casfalia punctata, CErsted, Notophyllum pvlynoides, QCrsted, Phyllodvce (jran- 

 landica, ffirsted, Eunnda sanyidnea. Q']rsted, Eteonc pttsilla, Oersted, Amtnochares 

 Oftonis, Grube (probably the Ops diyitata of Dr. Carrington), and a Lciocejdudus. 

 The TertheUa Jli/idus of Dalyell is not T. constrictor, Montagu, but a distinct .species 

 with 24 pairs of biistle bundles, whereas T. constrictor has only 17 pairs. Physelia 

 zostei-icola, ffirsted {Nicolea zosfericola, Malmgren), is common. 



