442 D. BTIYCE ON MACROTRACHELOUS CALLIDIN^. 



moderately-curved and tapering spurs. Besides this mark are 

 equally distinctive the prominent lobes of the upper lip, and the 

 tooth formula, while the modification of the toes into a tube -like 

 process, ending in a perforated disc, occurs only in a few other 

 forms. It is probably of very general distribution in this country, 

 as I have already seen examples from Devon, Bucks, Essex, and 

 Sussex. I bave observed in some specimens that the body 

 fluid contained numbers of minute granular bodies which flowed 

 hither and thither with each movement of the skin or organs. Dr. 

 Zelinka ^ has already observed similar constituents of the body 

 fluid in Call, russeola, and says that they are doubtless the same 

 structures which Leydig in his time described as blood-corpuscles, 

 and which we likewise have to regard as such. 



Callidina alpium, Ehr.2 (PI. XXIII., Fig. 1.) 



Sp. Ch. — Stout, transparent ; skin rough and stippled, 

 but not viscid; 14 dorsal and lateral longitudinal, and 9-10 

 Yentral transverse skin-folds ; anterior margin of first central 

 segment, with six knob-like prominences in two series, which 

 produce a cleft appearance at anterior end when body contracted. 

 Head with fronto-lateral swellings ; corona (54), sulcus (16) wide 

 by (10) deep ; upper lip concave, (usually) with minute tooth-like 

 prominences. Mastax longer than broad, rami (28|), formula |-, 

 teeth slightly diverging towards inner edge of ramus. Foot 

 moderately short, of four joints ; spurs (4-5), short blunt cones^ 

 with moderate interstice ; toes four, in two dissimilar pairs. Max. 

 length (238). 



Habitat : Wall and ground moss, Bognor ; roof moss, very 

 abundant, Deal. 



On page 11 of the " Supplement" Dr. Hudson,^ referring to 

 Ehrenberg's species (under the name " alpina"), states that it is 

 an alpine species of which he could find no details. Thanks, how- 

 ever, to the comprehensive Bibliography furnished by Zelinka, I 

 have been able to find the original description, a very brief one, 

 which I quote : — " Corpore hyalino, in contractione dorso longi- 

 tudinaliter, ventre transverse plicato, ovulis albis, dentibus binis 

 eccentricis. Longit. ^". E. viontis liosce alpiiim, 11138 pedum 

 altitudine. Plicse longitudinales 14, transversse 9-10 valde 

 singulares." This description was published in 1853, and the 

 species was thereafter, like most of the other Ehrenbergian Cal- 



