Professor Duns Zoological Notes. 41 



others. The lateral paddles are leaf-like and irregularly 

 heart-shaped, placed on a cushion, and associated with two 

 bundles of bristles on the same ring. The head is small, 

 with two pairs of minute terminal antennse, behind which, 

 at- the edge of the first ring, are four pairs of well marked 

 tentacular cirrhi. A deep groove runs from the head along 

 the middle of the ventral surface of the body. 



(3.) On the spcvwning of the Hermit Crah {Pagurus Bern- 

 liar dus). — Three specimens were exhibited, one 6 J inches 

 long, another 6 inches, and a third not more than x^V^hs of 

 an inch in length. All have layers of light brown round 

 eggs attached to the left side of the soft abdomen. The tiny 

 specimen when taken was clinging to the under surface of 

 one of the mature forms. Its slenderness and size seem to 

 indicate that it could not long have completed the stages of 

 its metamorphosis — a curious example of sexual maturity in 

 a comparatively high invertebrate at a very early age, the 

 parent continuing to live, unlike some insecta by which ova 

 are prodiiced at an equally early period. It is generally stated 

 that April is the spawning time of the hermit crab, but these 

 specimens, with their egg-clusters attached, were taken in Oban 

 Bay, August 1874. Many more were captured in the same 

 condition, and in every case the egg-bearing forms came up in 

 the dredge uncovered, having left their borrowed shells before 

 getting entangled in the dredge, as no empty shells fitted to 

 lodge them were found in it. 



(4.) On a species of Phasma {Palophus centauries, AVestw.) 

 — This large and finely preserved specimen was forwarded by 

 Dr Eobertson, Old Calabar, to the New College Museum. It 

 differs both in size and in some of its markings from a 

 specimen from the same locality, described by Westwood 

 in the British Museum Catalogue of Phasmidce. The length 

 of the body is 10 J inches, and the wing-expanse 7 inches, as 

 compared with Westwood's specimen, which is 9 inches long, 

 and the wing-expanse 5| inches. There is a corresponding 

 increase of size in the various parts of the body. The central 

 oblong tubercle on the tegmina, or winglet covers, is rough 

 above and smooth below. Fom^ dark spots, irregular in size 

 and position, occur on the thorax. 



