luvertebrata. Zoological Collections. 61 



in our present Number, as an index of what we are to expect from the labours of 

 that gentleman in the Invertebral Kingdom. Ed. 



Mode of constructing the tube of the larva of Cryptocephalus and Clythra. — 

 It has been supposed by entomologists that the tube in which the larva of Cryp- 

 tocephalus and Clythra live, is formed of earth agglutinated together by a secre- 

 tion exuded by the animal. M. Gene has, however, recently observed that the 

 tube of the larva of the Cryptocephalus is constructed from its excrement, which, 

 on being passed from the anus, is collected by the larva, and worked into the form, 

 of the tube by its mandibles. For some time after its formation the tube pre- 

 serves the green colour of the excrement ; but afterwards becomes black. M . 

 Gend conjectures, from analogy, that a similar method is followed by the larva of 

 the Clythra, a neighbouring genus, in the construction of its tubes. And he has 

 also remarked, that the same process is employed by the mother in providing for 

 the preservation of the egg of the young Cryptocephalus. As the egg passes 

 from her body, she completely envelopes it in her own excrement ; and the larva, 

 at the proper period, bieaking the egg in which it is contained, at the same time 

 ruptures the excrementitious envelope, and thus forms the first part of its tube.— 

 Ann. des Sci. Nat. xx. 143. 



Hipponoe ; a new genus of Annelida, instituted by MM. Audouin and Ed- 

 wards — The characters of this genus, the only known species of which was 

 brought home by M. Gaudichaud from Port-Jackson, are as follows : — 



Head distinct, and furnished with antennae ; proboscis destitute of jaws ; feet 

 composed of a single row ; no papillae, nor dorsal cirri ; branchiae in the form of 

 taraose tufts, or leaves, fixed to the superior base of the feet. 



The Hipponoe Gaudichaudi is nearly an inch long, and contains about thirty 

 articulations, the first of which (from the head) carries rudimentary branchiae only, 

 and the last of which are very small ; on the middle line of the ventral surface of 

 the body, which is very convex, there is a longitudinal groove, and on each side 

 a row of pores ; the dorsal surface is flat, and presents nothing remarkable ; the 

 feet are very little protruded. — Ann. des Sci. Nat. xx. 156. 



New habitat of the Euphrosine myrtosa. — The Euphrosine, a genus allied to 

 the Hipponoe, above described, in the group AmphinomcB of Savigny, was ori- 

 ginally discovered in the Red Sea, and had not been found elsewhere, till MM. 

 Audouin and Milne Edwards recently met with it, whilst dredging on the coasts 

 of the deparment of Manche. The species they found was the E. myrtosa Lam. ; 

 it occurred in abundance. — Ibid. 



Habitat of Asterias discoidea and A. laevigata. — The country of the Asterias 

 discoidea was unknown to M. Lamarck. M. J. Desjardins has found it on the 

 reefs, and the sands near Flacq, in the Mauritius. The Asterias Icevigata 

 also inhabits these coasts. In this species, M. Desjardins counted 3250 spines 

 on the margins of the rays. Reaumur considered 1520 a great number in the 

 common sea-star Ann. des Sci. Nat. xx. 177« 



On the Anatomical Structure of the Sea-mouse, (Aphrodita aculeata, Lin., 

 Halithea aculeata, Lam. ;) by M. G. R. Treviranus — Many naturalists, and, 

 amongst others, Redi, {JDe Animalculis vivis, p. 281 ;) Swammerdam, (Bibl. 

 Nat. p. 904 ;) Gunner, (Schrift. der Drontheimischen Gesellschaft, Part iii. p. 

 64 ;) Palias, (Miscell. Zool. p. 81 ;) and Home, (Phil. Trans. 1815, p. 260 ;) 

 have already described the internal structure of the Aphrodita aculeata. Never- 

 theless, M. Treviranus has been able to enrich our knowledge of the anatomy of 

 this Annelida with many new observations. 



Under the integuments of the back of the animal, two transparent membranes 

 are found, one external and the other internal. The external membrane, which 



