Rev. Canon A. M. Norman on British MysirUe. 148 



the antennae) and 1 niillim. in breadtli. All the appendat^es 

 were developed, viz. antcnnne, oral papillae, two pairs of jaws, 

 and fifteen pairs of claw-bearing legs. The eyes were con- 

 spicnous at the bases of the antennae, and the antennae them- 

 selves showed each about twenty deeply pigmented anniili. 

 The remainder of the body was nearly white ; but very 

 distinct isolated pigment patches (chiefly indigo-blue, with a 

 few specks of orange) appeared, scattered pretty abundantly 

 over the legs and back. The mouth was surrounded by the 

 very characteristic thick transversely furrowed lip. The 

 dermal papilla3 were very obvious and exhibited the charac- 

 teristic spines, the cuticle being very strongly developed. 

 The chiws on the feet were very distinct. The alimentary 

 canal was full of granular food-yolk. The specimen was 

 stained with borax carmine and mounted in Canada balsam. 



This embryo, then, developed for at least eight months and 

 a half after the egg was laid, and at the end of that time was 

 a perfect young Peripatns, differing externally from the adult 

 only in its smaller size and less deeply pigmented skin. 



There are still two eggs left in the hatching -box, but they 

 do not look to me at present as if they were going to hatch. 

 Whether they do so or not, however, I think I may fairly 

 claim to have now definitely proved that the larger Victorian 

 Peripatus at any rate sometimes lays eggs, and that these eggs 

 are capable of undergoing development outside the body until 

 perfect young animals are produced. The great length of 

 time required for the development of the eggs is very remark- 

 able, but is only what one might expect on considering the 

 unusual length of time required for intra-uterine development 

 in other species. 



XV. — On British Mysidaj, a Familij of Crustacea Sohizo- 

 poda. By the Rev. Canon A. M. NORMAN, M.A., D.C.L., 

 F.R.S., &c. 



[Plates IX. & X.] 



In the ' Annals ' for June I published a paper on the British 

 species of the families Lophogastrida^ and Euphausildie; it 

 is my present purpose to complete the account of our Schizo- 

 poda by the following descriptions of the Mysidi^. 



Only six species of this family were described in Bell's 

 ' British Stalk-eyed Crustacea.' Since the publication of 

 that work a considerable number of additional species have 

 from time to time been recorded or described. The present 

 paper will be found to contain thirty-three forms, the known 

 geographical distribution of which will be seen in the follow- 

 ing: table : — 



